2019 in ichnology

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Last updated November 30, 2023

This article records new taxa of trace fossils of every kind that are scheduled to be described during the year 2019, as well as other significant discoveries and events related to trace fossil paleontology that are scheduled to occur in the year 2019.

Research

Ivantsov, Nagovitsyn & Zakrevskaya (2019) describe traces of macroorganisms associated with the body imprints of trace-producers from Ediacaran deposits of the southeastern White Sea region (Russia).^[1]
Xiao et al. (2019) describe a new trace fossil from the Ediacaran Dengying Formation (China), interpreted as produced by a bilaterian animal exploring an oxygen oasis in microbial mats, and name a new ichnotaxon Yichnus levis.^[2]
A study on the ichnotaxon Macaronichnus segregatis degiberti described on the basis of fossil burrows likely formed through selective sand feeding and excretion of polychaetes, aiming to reconstruct tracemaker behaviour, is published by Nara & Seike (2019).^[3]
A study on the horseshoe crab traces from the Carboniferous Steven C. Minkin Fossil Site (Alabama, United States) is published by King, Stimson & Lucas, who name new ichnospecies Kouphichnium atkinsoni and K. minkinensis.^[4]
Horseshoe crab traces from the Middle Jurassic strata of the Imilchil area (Central High Atlas, Morocco), indicating the presence of horseshoe crabs at the southern margin of the Tethys Ocean, are described by Oukassou et al. (2019).^[5]
Tracks of giant millipede-like arthropods, assigned to the ichnotaxon Diplichnites cuithensis and likely produced by members of the genus Arthropleura , are described from the Carboniferous (late Pennsylvanian) of the Graissessac Basin (southern France) by Moreau et al. (2019).^[6]
Tracks produced by an edopoid temnospondyl are described from the Carboniferous (Viséan) Alston Formation (North Yorkshire, United Kingdom) by Bird et al. (2019), representing the stratigraphically oldest known tetrapod trackway from the United Kingdom reported so far and the oldest known record of Edopoidea.^[7]
First tetrapod tracks from the Permian of Sardinia (Italy), assigned to the ichnogenus Merifontichnus and representing the oldest occurrence of the ichnogenus to date, are described by Citton et al. (2019).^[8]
A study on the taphonomy of Permian (Cisuralian) tetrapod tracks from the Coconino and De Chelly formations of Arizona, and on the locomotion and phylogenetic relationships of the trackmakers, is published by Marchetti et al. (2019).^[9]
Tetrapod tracks assigned to the ichnogenus Ichniotherium are reported from the eolian Coconino Sandstone by Francischini et al. (2019), who interpret these tracks as the oldest known evidence of occupation of deserts by non-amniote tetrapods (probably diadectomorphs.^[10]
A revision of Lopingian tetrapod tracks from eolian paleoenvironments of Germany and Scotland is published by Marchetti, Voigt & Lucas (2019), who reject the interpretation of these tracks as monospecific associations of synapsid footprints, reporting them to be more diverse, and interpret them as evidence indicating that faunal turnover related to end-Guadalupian extinction event occurred not only at high-mid paleolatitudes, but also at low paleolatitudes of Pangaea.^[11]
A revision of tetrapod tracks from the Upper Permian Val Gardena Formation of the Dolomites region in northern Italy is published by Marchetti, Voigt & Klein (2019), who name new ichnogenus Dolomitipes .^[12]
A revision of tetrapod tracks from Permian-Early Triassic tracksites in the main Karoo Basin of South Africa is published by Marchetti et al. (2019), who name new ichnotaxon Karoopes gansfonteinensis.^[13]
Tetrapod footprints, mostly quadruped trackways of large footprints most likely produced by kannemeyeriiform dicynodonts, are described from the Middle Triassic Cerro de las Cabras Formation (Argentina) by Lagnaoui et al. (2019), who name a new ichnotaxon Pentasauropus argentinae.^[14]
The oldest frog tracks reported from the fossil record are described from the Lower Cretaceous (Aptian-Albian) Jinju Formation (South Korea) by Kim et al. (2019).^[15]
A new assemblage of lizard tracks, representing the largest such assemblage yet reported from the Cretaceous, is described from the Lower Cretaceous Jinju Formation (South Korea) by Kim et al. (2019), who name a new ichnotaxon Neosauroides innovatus.^[16]
Trackways of sea turtle hatchlings are described from the Pleistocene of South Africa by Lockley et al. (2019), who name new ichnotaxa Australochelichnus agulhasii and Marinerichnus latus.^[17]
Complete step cycles produced by archosaurs, assigned to the ichnogenus Brachychirotherium , are described from the Upper Triassic Machraa Abbass Member of the Oued Oum Er Rbiaa Formation (Morocco) by Hminna et al. (2019), representing the first complete trackway of this ichnogenus in North Africa.^[18]
A study on tracks assigned to the ichnogenus Chirotherium from the Middle Triassic Guanling Formation (Yunnan, China), produced by members of Archosauriformes, is published online by Xing & Klein (2019), who also describe the first tracks and trackways of the ichnogenus Rhynchosauroides from the Asian continent.^[19]
Five invertebrate traces including a new ichnospecies of Diplichnites (Diplichnites rawi), were described from the latest Carboniferous of Shropshire, England by Hedge et al. (2019) ^[20]
Tetrapod burrow most likely produced by a notosuchian crocodylomorph is described from the Upper Cretaceous Bauru Group (Brazil) by Martinelli et al. (2019).^[21]
Crocodyliform tracks, probably produced under water by a bottom walking and punting animal, are described from the Upper Cretaceous (?Cenomanian-Santonian) Bayan Shireh Formation (Mongolia) by Lee et al. (2019).^[22]
Costa-Pérez, Moratalla & Marugán-Lobón (2019) evaluate the utility of geometric morphometrics for determining the degree to which size, speed and taxonomy are contributing factors to the difference of bipedal dinosaur trackways.^[23]
New Middle Jurassic tracksite dominated by non-avian theropod footprints, including theropod trackways with preserved manus tracks, is reported from the Wangjiashan Formation (Gansu, China) by Li et al. (2019), who name a new ichnotaxon Grallator pingchuanensis.^[24]
A study comparing Late Jurassic tracks of large theropods from Europe and North Africa is published by Belvedere et al. (2019).^[25]
A diverse assemblage of dinosaur footprints is described from the Lower Cretaceous (Berriasian-Valanginian) Ashdown Formation of East Sussex, southern England by Shillito & Davies (2019).^[26]
Theropod footprints with anatomical features which don't match any known Gondwanan theropod with preserved pedal bones are described from the Albian Lagarcito Formation (Argentina) by Melchor et al. (2019), who name a new ichnotaxon Picunichnus quijadaensis Melchor.^[27]
A study on the ichnotaxonomy of theropod footprints from the Lower Cretaceous Kitadani Formation (Japan) is published by Tsukiji et al. (2019).^[28]
Small theropod footprints representing the ichnogenus Minisauripus , preserving high-definition skin traces, are described from the Lower Cretaceous Jinju Formation (South Korea) by Kim et al. (2019).^[29]
A study on putative theropod footprints assigned to the ichnogenus Eubrontes is published by Weems (2019), who argues that bipedal sauropodomorphs were more likely trackmakers of these tracks.^[30]
A study on sauropod tracks from the Jurassic Tafaytour tracksites (Argana Basin, Morocco), and on their implications for inferring forelimb posture in sauropod dinosaurs, is published by Lallensack et al. (2019).^[31]
A study on sauropod tracks from a new dinosaur tracksite from the Middle Jurassic Isli Formation (Morocco), providing evidence of presence of basal eusauropods in the Middle Jurassic-Early Cretaceous interval in the northwestern part of Gondwana, is published by Oukassou et al. (2019).^[32]
A study on sauropod tracks from the Upper Jurassic Tianchihe Formation at the Guanxi site (Shanxi, China) is published online by Xing et al. (2019).^[33]
An assemblage of sauropod tracks with a considerable size range, likely produced by an association of sauropods of different size-classes, is described from the Cretaceous Hengshan Formation (Zhejiang, China) by Xing et al. (2019).^[34]
New sauropod trackway, representing the first record of a narrow-gauge sauropod trackway from the Cenomanian reported so far, will be described from the Candeleros Formation (Argentina) by Heredia et al. (2019).^[35]
Large ornithischian (probably thyreophoran) tracks are described from the Middle Jurassic Chuanjie Formation (China) by Xing et al. (2019).^[36]
Probable track of a thyreophoran dinosaur, possibly produced by Isaberrysaura , is described from the Middle Jurassic Lajas Formation (Argentina) by Pablo et al. (2019).^[37]
Ordovician arthropod trackways in the Borrowdale Volcanic Group were shown to be more likely to be death traces than evidence for early life on land by Shillito and Davies (2019). ,^[38]
A study on non-avian dinosaur and bird tracks (representing some of the oldest known bird tracks) preserved in slabs used as building stones at the Chengde Mountain Resort, originating from the Tuchengzi Formation (China) and dating to the Jurassic-Cretaceous boundary, is published online by Xing et al. (2019).^[39]
Description of non-avian dinosaur and bird tracks from the Upper Cretaceous Chignik Formation (southwestern Alaska), evaluating their implications for the knowledge of habitat preferences of northern high-latitude dinosaurs, is published by Fiorillo et al. (2019).^[40]
A study on bird footprints from the Maastrichtian–Danian Yacoraite Formation (Argentina) is published by de Valais & Cónsole-Gonella (2019).^[41]
Flamingo-like and anatid-like fossil bird footprints are described from the Vinchina Formation (Argentina) by Farina et al. (2019), who name new ichnotaxa Phoenicopterichnum lucioi and P. vinchinaensis.^[42]
Pterosaur tracks, larger than most other pterosaurian ichnites of the Late Jurassic age, are described from the Kimmeridgian carbonate deposits exposed in Wierzbica Quarry (Poland) by Elgh, Pieńkowski & Niedźwiedzki (2019).^[43]
Evidence from coprolites, isolated worn teeth, fossil regurgitates and crushed or bite-marked dicynodont bones, indicating that Triassic archosaur Smok wawelski was at least an occasional osteophage consuming bones in a manner comparable to tyrannosaurid theropod dinosaurs, is presented by Qvarnström, Ahlberg & Niedźwiedzki (2019).^[44]
A new late Pleistocene site containing bones and footprints of mammals is reported from Brazil by Oliveira et al. (2019).^[45]
Large carnivore footprints, probably produced by Smilodon populator, will be described from a new ichnological site from the Late Pleistocene of Buenos Aires Province (Argentina) by Agnolin et al. (2019), who name a new ichnotaxon Felipeda miramarensis.^[46]
A study on hominin footprints discovered near Ileret (Kenya) and on their implications for the knowledge of sexual dimorphism in Homo erectus is published by Villmoare, Hatala & Jungers (2019).^[47]
A study on human footprints, handprints and other traces from the Upper Paleolithic of the Bàsura Cave (Italy), and on their implications for the knowledge of the behavior and social structure of the human group inhabiting this cave, is published by Romano et al. (2019).^[48]
Trace fossils assigned to the ichnogenus Protopaleodictyon , of large size compared to other ichnospecies of this ichnogenus, are described from the Cambrian Stephen–Eldon formation transition (Alberta, Canada) by Morgan, Henderson & Pratt (2019), who name a new ichnospecies Protopaleodictyon aitkeni.^[49]
A study on trace fossils from the Lower Triassic Dongchuan, Feixianguan and Jialingjiang formations (China), and on their implications for inferring how the Permian–Triassic extinction event affected the brackish-water ecosystem and how this ecosystem recovered in the Early Triassic, is published by Zhang et al. (2019).^[50]
A study on trace fossils from the early Middle Triassic Luoping Biota (Yunnan Province, South China), and on their implications for inferring the timing of recovery of marine ecosystems after Permian–Triassic extinction event, is published by Luo et al. (2019).^[51]
Paleodictyon trace fossils are reported from the Upper Triassic Bagong Formation (China) by Zhan, Peng & Chen (2019).^[52]

Related Research Articles

<span class="mw-page-title-main">Fossil track</span> Fossilized footprint (ichnite)

A fossil track or ichnite is a fossilized footprint. This is a type of trace fossil. A fossil trackway is a sequence of fossil tracks left by a single organism. Over the years, many ichnites have been found, around the world, giving important clues about the behaviour of the animals that made them. For instance, multiple ichnites of a single species, close together, suggest 'herd' or 'pack' behaviour of that species.

<span class="mw-page-title-main">Lark Quarry Dinosaur Trackways</span> Conservation park in Queensland, Australia

Dinosaur Stampede National Monument at Lark Quarry Conservation Park in Queensland, Australia is considered to be the site of the world's only known record of a dinosaur stampede, with fossilised footprints are interpreted as a predator stalking and causing a stampede of around 150 two-legged dinosaurs. This interpretation has been challenged in recent years, with evidence suggesting it may have been a natural river crossing.

The Ziliujing Formation is a geological formation in China, It is Early Jurassic in age. It is part of the stratigraphy of the Sichuan Basin. The dinosaur Gongxianosaurus and indeterminate theropod material are known from the Dongyuemiao Member of the formation, as well as dinosaur footprints, Zizhongosaurus and indeterminate prosauropods from the Da'anzhai Member. The basal sauropod Sanpasaurus is known from the Maanshan Member. An unnamed stegosaur and the pliosauroid plesiosaur Sinopliosaurus are also known from this formation but they were found an indeterminate member. An unnamed teleosaurid known from a complete skull has also been found in the formation, pending a formal description. The deposition environment during the Da'anzhai Member in the lower Toarcian is thought to have been that of a giant freshwater lake encompassing the whole of the Sichuan basin, around 3 times larger than Lake Superior, coeval with the Toarcian Oceanic Anoxic Event around 183 Ma.

Eubrontes is the name of fossilised dinosaur footprints dating from the Late Triassic and Early Jurassic. They have been identified from France, Poland, Slovakia, Czech Republic, Italy, Spain, Sweden, Australia (Queensland), US, India and China.

Otozoum is an extinct ichnogenus of sauropodomorph dinosaur from the Late Triassic-Middle Jurassic sandstones. Footprints were made by heavy, bipedal or, sometimes, quadrupedal animals with a short stride that walked on four toes directed forward. These footprints are relatively large, over 20 cm in pes length. Otozoum differs from Plateosaurus by having a notable homopody.

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The Haman Formation is an Early Cretaceous geological formation in South Korea. It has been dated to the Albian, with an estimated maximum depositional age of 105.4 ± 0.4 Ma. The deposit is known for its tracks, including those of dinosaurs, pterosaurs and birds. It overlies the Silla Conglomerate which overlies the Chilgok Formation. It is laterally equivalent to the Sagog Formation.

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This article records new taxa of fossil archosaurs of every kind that are scheduled described during the year 2020, as well as other significant discoveries and events related to paleontology of archosaurs that are scheduled to occur in the year 2020.

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This article records new taxa of fossil archosaurs of every kind that are scheduled described during the year 2022, as well as other significant discoveries and events related to paleontology of archosaurs that are scheduled to occur in the year 2022.

Characichnos is an ichnogenus of possibly dinosaurian tetrapod footprint. It includes a single species, C. tridactylus, known from prints found in the Middle Jurassic Saltwick Formation of Yorkshire, United Kingdom.

This article records new taxa of every kind of fossil archosaur that are scheduled to be described during 2023, as well as other significant discoveries and events related to the paleontology of archosaurs that will be published in 2023.

Farlowichnus is an ichnogenus of small theropod dinosaur footprint. It includes a single species, F. rapidus, known from prints found in the Early Cretaceous Botucatu Formation of Brazil. Farlowichnus is known from several fossil trackways that indicate that it was likely a cursorial animal that was well-adapted to desert environments.

References

↑ Andrey Ivantsov; Aleksey Nagovitsyn; Maria Zakrevskaya (2019). "Traces of locomotion of Ediacaran macroorganisms". Geosciences. 9 (9): Article 395. doi: 10.3390/geosciences9090395 .
↑ Shuhai Xiao; Zhe Chen; Chuanming Zhou; Xunlai Yuan (2019). "Surfing in and on microbial mats: Oxygen-related behavior of a terminal Ediacaran bilaterian animal". Geology. 47 (11): 1054–1058. doi: 10.1130/G46474.1 .
↑ Masakazu Nara; Koji Seike (2019). "Palaeoecology of Macaronichnus segregatis degiberti: Reconstructing the infaunal lives of the travisiid polychaetes". Palaeogeography, Palaeoclimatology, Palaeoecology. 516: 284–294. doi:10.1016/j.palaeo.2018.12.011. S2CID 134164851.
↑ Olivia A. King; Matthew R. Stimson; Spencer G. Lucas (2019). "The ichnogenus Kouphichnium and related xiphosuran traces from the Steven C. Minkin Paleozoic Footprint Site (Union Chapel Mine), Alabama, USA: ichnotaxonomic and paleoenvironmental implications". Ichnos: An International Journal for Plant and Animal Traces. 26 (4): 266–302. doi: 10.1080/10420940.2018.1561447 .
↑ Mostafa Oukassou; Abdelouahed Lagnaoui; André Charrière; Hafid Saber; Wahiba Bel Haouz; Gerard D. Gierliński; Hendrik Klein; Hassan Ibouh (2019). "New evidence of xiphosurids from the Middle Jurassic of Morocco: Palaeoenvironmental, palaeoecological and palaeobiogeographical implications". Palaeogeography, Palaeoclimatology, Palaeoecology. 516: 268–283. doi:10.1016/j.palaeo.2018.11.034. S2CID 133758009.
↑ Jean-David Moreau; Georges Gand; Emmanuel Fara; Jean Galtier; Nicolas Aubert; Stéphane Fouché (2019). "Trackways of Arthropleura from the Late Pennsylvanian of Graissessac (Hérault, southern France)". Historical Biology: An International Journal of Paleobiology. 33 (7): 996–1007. doi:10.1080/08912963.2019.1675055. S2CID 208597626.
↑ Hannah C. Bird; Angela C. Milner; Anthony P. Shillito; Richard J. Butler (2019). "A lower Carboniferous (Visean) tetrapod trackway represents the earliest record of an edopoid amphibian from the UK". Journal of the Geological Society. 177 (2): 276–282. doi:10.1144/jgs2019-149. S2CID 213393740.
↑ Paolo Citton; Ausonio Ronchi; Simone Maganuco; Martina Caratelli; Umberto Nicosia; Eva Sacchi; Marco Romano (2019). "First tetrapod footprints from the Permian of Sardinia and their palaeontological and stratigraphical significance". Geological Journal. 54 (4): 2084–2098. doi:10.1002/gj.3285. S2CID 135216684.
↑ Lorenzo Marchetti; Sebastian Voigt; Spencer G. Lucas; Heitor Francischini; Paula Dentzien-Dias; Roberto Sacchi; Marco Mangiacotti; Stefano Scali; Andrea Gazzola; Ausonio Ronchi; Amanda Millhouse (2019). "Tetrapod ichnotaxonomy in eolian paleoenvironments (Coconino and De Chelly formations, Arizona) and late Cisuralian (Permian) sauropsid radiation". Earth-Science Reviews. 190: 148–170. doi: 10.1016/j.earscirev.2018.12.011 .
↑ Heitor Francischini; Spencer G. Lucas; Sebastian Voigt; Lorenzo Marchetti; Vincent L. Santucci; Cassandra L. Knight; John R. Wood; Paula Dentzien-Dias; Cesar L. Schultz (2019). "On the presence of Ichniotherium in the Coconino Sandstone (Cisuralian) of the Grand Canyon and remarks on the occupation of deserts by non-amniote tetrapods". PalZ. 94 (1): 207–225. doi:10.1007/s12542-019-00450-5. S2CID 181356924.
↑ Lorenzo Marchetti; Sebastian Voigt; Spencer G. Lucas (2019). "An anatomy-consistent study of the Lopingian eolian tracks of Germany and Scotland reveals the first evidence of the end-Guadalupian mass extinction at low paleolatitudes of Pangea". Gondwana Research. 73: 32–53. doi:10.1016/j.gr.2019.03.013. S2CID 146780505.
↑ Lorenzo Marchetti; Sebastian Voigt; Hendrik Klein (2019). "Revision of Late Permian tetrapod tracks from the Dolomites (Trentino-Alto Adige, Italy)". Historical Biology: An International Journal of Paleobiology. 31 (6): 748–783. doi:10.1080/08912963.2017.1391806. S2CID 134771751.
↑ Lorenzo Marchetti; Hendrik Klein; Michael Buchwitz; Ausonio Ronchi; Roger M.H. Smith; William J. De Klerk; Lara Sciscio; Gideon H. Groenewald (2019). "Permian-Triassic vertebrate footprints from South Africa: Ichnotaxonomy, producers and biostratigraphy through two major faunal crises". Gondwana Research. 72: 139–168. doi: 10.1016/j.gr.2019.03.009 .
↑ Abdelouahed Lagnaoui; Ricardo N. Melchor; Eduardo S. Bellosi; Pablo M. Villegas; Nahuel Espinoza; Aldo M. Umazano (2019). "Middle Triassic Pentasauropus-dominated ichnofauna from western Gondwana: Ichnotaxonomy, palaeoenvironment, biostratigraphy and palaeobiogeography". Palaeogeography, Palaeoclimatology, Palaeoecology. 524: 41–61. doi:10.1016/j.palaeo.2019.03.020. S2CID 133757156.
↑ Kyung Soo Kim; Martin G. Lockley; Jong Deock Lim; Dong Hee Kim (2019). "The oldest known anuran (frog) trackways from the Jinju Formation, Lower Cretaceous, Korea". Cretaceous Research. 96: 142–148. doi:10.1016/j.cretres.2018.12.008. S2CID 134521999.
↑ Kyung Soo Kim; Jong Deock Lim; Martin G. Lockley; Dong Hee Kim; Laura Piñuela; Jae Sang Yoo (2019). "Largest Cretaceous lizard track assemblage, new morphotypes and longest trackways comprise diverse components of an exceptional Korean Konservat-Lagerstätten ichnofauna". Scientific Reports. 9 (1): Article number 13278. doi:10.1038/s41598-019-49442-0. PMC 6746761 . PMID 31527673.
↑ Martin G. Lockley; Hayley C. Cawthra; Jan C. De Vynck; Charles W. Helm; Richard T. McCrea; Ronel Nel (2019). "New fossil sea turtle trackway morphotypes from the Pleistocene of South Africa highlight role of ichnology in turtle paleobiology". Quaternary Research. 92 (3): 626–640. doi: 10.1017/qua.2019.40 .
↑ Abdelkbir Hminna; Hendrik Klein; Tariq Zouheir; Abdelouahed Lagnaoui; Hafid Saber; Jens N. Lallensack; Mostafa Oukassou (2019). "The Late Triassic archosaur ichnogenus Brachychirotherium: first complete step cycles from Morocco, North Africa, with implications for trackmaker identification and ichnotaxonomy". Historical Biology: An International Journal of Paleobiology. 33 (5): 1–14. doi:10.1080/08912963.2019.1658097. S2CID 202864611.
↑ Lida Xing; Hendrik Klein (2019). "Chirotherium and first Asian Rhynchosauroides tetrapod trackways from the Middle Triassic of Yunnan, China". Historical Biology: An International Journal of Paleobiology. 33 (6): 791–801. doi:10.1080/08912963.2019.1661409. S2CID 202863096.
↑ J. Hedge; A. P. Shillito; N. S. Davies; R. J. Butler; I. J. Sansom (2019). "Invertebrate trace fossils from the Alveley Member, Salop Formation (Pennsylvanian, Carboniferous), Shropshire, UK" (PDF). Proceedings of the Geologists' Association. 130: 103–111. doi:10.1016/j.pgeola.2018.10.002. S2CID 134109139.
↑ Agustín G. Martinelli; Giorgio Basilici; Lucas E. Fiorelli; Carolina Klock; Joachim Karfunkel; Ariela Costa Diniz; Marcus V.T. Soares; André Marconato; João Ismael da Silva; Luiz Carlos B. Ribeiro; Thiago S. Marinho (2019). "Palaeoecological implications of an Upper Cretaceous tetrapod burrow (Bauru Basin; Peirópolis, Minas Gerais, Brazil)". Palaeogeography, Palaeoclimatology, Palaeoecology. 528: 147–159. doi:10.1016/j.palaeo.2019.05.015. S2CID 181458875.
↑ Yuong-Nam Lee; Hang-Jae Lee; Yoshitsugu Kobayashi; Ariana Paulina-Carabajal; Rinchen Barsbold; Anthony R. Fiorillo; Khishigjav Tsogtbaatar (2019). "Unusual locomotion behaviour preserved within a crocodyliform trackway from the Upper Cretaceous Bayanshiree Formation of Mongolia and its palaeobiological implications". Palaeogeography, Palaeoclimatology, Palaeoecology. 533: Article 109239. doi:10.1016/j.palaeo.2019.109239. S2CID 197584839.
↑ Mireia Costa-Pérez; José Joaquín Moratalla; Jesús Marugán-Lobón (2019). "Studying bipedal dinosaur trackways using geometric morphometrics". Palaeontologia Electronica. 22 (3): Article number 22.3.pvc–3. doi: 10.26879/980 .
↑ Da-Qing Li; Li-Da Xing; Martin G. Lockley; Anthony Romilio; Jing-Tao Yang; Long-Feng Li (2019). "The first theropod tracks from the Middle Jurassic of Gansu, Northwest China: new and rare evidence of quadrupedal progression in theropod dinosaurs". Journal of Palaeogeography. 8 (1): Article 10. doi: 10.1186/s42501-019-0028-4 .
↑ Matteo Belvedere; Diego Castanera; Christian A. Meyer; Daniel Marty; Octavio Mateus; Bruno Camilo Silva; Vanda F. Santos; Alberto Cobos (2019). "Late Jurassic globetrotters compared: A closer look at large and giant theropod tracks of North Africa and Europe". Journal of African Earth Sciences. 158: Article 103547. doi:10.1016/j.jafrearsci.2019.103547. S2CID 198400391.
↑ Anthony P. Shillito; Neil S. Davies (2019). "Dinosaur-landscape interactions at a diverse Early Cretaceous tracksite (Lee Ness Sandstone, Ashdown Formation, southern England)". Palaeogeography, Palaeoclimatology, Palaeoecology. 514: 593–612. doi:10.1016/j.palaeo.2018.11.018. S2CID 135081484.
↑ Ricardo N. Melchor; David L. Rivarola; Aldo Martín Umazano; Magdalena Nalín Moyano; Fátima R. Mendoza Belmontes (2019). "Elusive Cretaceous Gondwanan theropods: the footprint evidence from central Argentina". Cretaceous Research. 97: 125–142. doi:10.1016/j.cretres.2019.01.004. S2CID 133788331.
↑ Yuta Tsukiji; Yoichi Azuma; Fumito Shiraishi; Masateru Shibata (2019). "A diverse theropod footprint assemblage from the Lower Cretaceous Kitadani Formation, Tetori Group, central Japan". Cretaceous Research. 97: 16–33. doi:10.1016/j.cretres.2019.01.003. S2CID 135285358.
↑ Kyung Soo Kim; Martin G. Lockley; Jong Deock Lim; Lida Xing (2019). "Exquisitely-preserved, high-definition skin traces in diminutive theropod tracks from the Cretaceous of Korea". Scientific Reports. 9 (1): Article number 2039. doi:10.1038/s41598-019-38633-4. PMC 6375998 . PMID 30765802.
↑ Robert E. Weems (2019). "Evidence for bipedal prosauropods as the likely Eubrontes track-makers". Ichnos: An International Journal for Plant and Animal Traces. 26 (3): 187–215. doi:10.1080/10420940.2018.1532902. S2CID 133770251.
↑ Jens N. Lallensack; Shinobu Ishigaki; Abdelouahed Lagnaoui; Michael Buchwitz; Oliver Wings (2019). "Forelimb orientation and locomotion of sauropod dinosaurs: insights from the ?Middle Jurassic Tafaytour tracksites (Argana Basin, Morocco)". Journal of Vertebrate Paleontology. 38 (5): e1512501. doi:10.1080/02724634.2018.1512501. S2CID 92247018.
↑ Mostafa Oukassou; Hendrik Klein; Abdelouahed Lagnaoui; André Charrière; Hafid Saber; Gerard D. Gierliński; Jens N. Lallensack; Abdelkbir Hminna; Ayoub Boumaalif; Ahmed Oussou; Driss Ouarhache (2019). "Polyonyx-like tracks from Middle-?Upper Jurassic red beds of Morocco: implications for sauropod communities on southern margins of Tethys". Palaeogeography, Palaeoclimatology, Palaeoecology. 536: Article 109394. doi:10.1016/j.palaeo.2019.109394. S2CID 210315305.
↑ Lida Xing; Hendrik Klein; Enze Wang; W. Scott Persons IV (2019). "Upper Jurassic dinosaur tracks from the Tianchihe Formation of Shanxi Province, China: review and new observations". Historical Biology: An International Journal of Paleobiology. 33 (6): 1–8. doi:10.1080/08912963.2019.1661408. S2CID 202857014.
↑ Lida Xing; Martin G. Lockley; Hendrik Klein; Chunyong Chou; Donghao Wang; W. Scott Persons IV (2019). "A mid-Cretaceous dinosaur track assemblage from the Hengshan Formation in central Zhejiang, China". Historical Biology: An International Journal of Paleobiology. 33 (7): 973–980. doi:10.1080/08912963.2019.1675053. S2CID 208593638.
↑ Arturo Miguel Heredia; Pablo José Pazos; Diana Elizabeth Fernández; Ignacio Díaz Martínez; Marcos Comerio (2019). "A new narrow-gauge sauropod trackway from the Cenomanian Candeleros Formation, northern Patagonia, Argentina". Cretaceous Research. 96: 70–82. doi:10.1016/j.cretres.2018.11.016. hdl: 11336/94924 . S2CID 134917409.
↑ Lida Xing; Martin G. Lockley; Hendrik Klein; Gerard D. Gierliński; Yong Ye; Jianping Zhang; W. Scott Persons IV; Tao Wang (2019). "First thyreophoran type tracks from the Middle Jurassic Chuanjie Formation of Yunnan Province, China". Ichnos: An International Journal for Plant and Animal Traces. 26 (1): 8–15. doi:10.1080/10420940.2018.1479962. S2CID 134190731.
↑ J. Pazos Pablo; González Estebenet M. Candela; E. Cocca Sergio; Dania Pascua (2019). "The oldest record of a tyreophoran track in Gondwana: Geological implications of subaerial exposure in the lower part of the Lajas Formation at the Covunco section (Neuquén Basin), Patagonia, Argentina". Journal of South American Earth Sciences. 94: Article 102198. doi:10.1016/j.jsames.2019.05.014. S2CID 181619510.
↑ A. P. Shillito; N. S. Davies (2019). "Death near the shoreline, not life on land: Ordovician arthropod trackways in the Borrowdale Volcanic Group, UK". Geology. 47: 55–58. doi:10.1130/G45663.1.
↑ Lida Xing; Martin G. Lockley; Tianming Du; Lijun Zhang; Hendrik Klein; Anthony Romilio; W. Scott Persons IV; Kuan Wang; Zhenyu Li; Xiaoqiao Wan (2019). "Dinosaur tracks from the Jurassic-Cretaceous boundary Tuchengzi Formation (Hebei Province, China) used as building stones in the Chengde imperial summer resort: age, ichnology, and history". Cretaceous Research. 107: Article 104310. doi:10.1016/j.cretres.2019.104310. S2CID 210266977.
↑ Anthony R. Fiorillo; Yoshitsugu Kobayashi; Paul J. McCarthy; Tomonori Tanaka; Ronald S. Tykoski; Yuong-Nam Lee; Ryuji Takasaki; Junki Yoshida (2019). "Dinosaur ichnology and sedimentology of the Chignik Formation (Upper Cretaceous), Aniakchak National Monument, southwestern Alaska; Further insights on habitat preferences of high-latitude hadrosaurs". PLOS ONE. 14 (10): e0223471. doi: 10.1371/journal.pone.0223471 . PMC 6821036 . PMID 31665132.
↑ Silvina de Valais; Carlos Cónsole-Gonella (2019). "An updated review of the avian footprint record from the Yacoraite Formation (Maastrichtian-Danian), northwestern Argentina". Ichnos: An International Journal for Plant and Animal Traces. 26 (3): 224–241. doi:10.1080/10420940.2018.1538982. S2CID 134497422.
↑ Martin Ezequiel Farina; Verónica Krapovickas; Lucas Fernández Piana; Rocío Belen Vera; María De Los Ángeles Ordoñez (2019). "Flamingo-like footprints and the problem of addressing biological diversity in the past". Historical Biology: An International Journal of Paleobiology. 33 (7): 912–926. doi:10.1080/08912963.2019.1669024. S2CID 208582248.
↑ Erik Elgh; Grzegorz Pieńkowski; Grzegorz Niedźwiedzki (2019). "Pterosaur track assemblages from the Upper Jurassic (lower Kimmeridgian) intertidal deposits of Poland: Linking ichnites to potential trackmakers". Palaeogeography, Palaeoclimatology, Palaeoecology. 530: 32–48. doi:10.1016/j.palaeo.2019.05.016. S2CID 182940454.
↑ Martin Qvarnström; Per E. Ahlberg; Grzegorz Niedźwiedzki (2019). "Tyrannosaurid-like osteophagy by a Triassic archosaur". Scientific Reports. 9 (1): Article number 925. doi:10.1038/s41598-018-37540-4. PMC 6353991 . PMID 30700743.
↑ Édison V. Oliveira; Pétrius S. Bélo; Gelson L. Fambrini; Alcides N. Sial; Ana K.B. Silva; Alcina M.F. Barreto (2019). "A new late Pleistocene ichnological site with mammal footprints from Brazil". Journal of South American Earth Sciences. 94: Article 102216. doi:10.1016/j.jsames.2019.102216. S2CID 189964303.
↑ Federico L. Agnolin; Nicolás R. Chimento; Denise H. Campo; Mariano Magnussen; Daniel Boh; Francisco De Cianni (2019). "Large carnivore footprints from the Late Pleistocene of Argentina". Ichnos: An International Journal for Plant and Animal Traces. 26 (2): 119–126. doi:10.1080/10420940.2018.1479962. S2CID 134190731.
↑ Brian Villmoare; Kevin G. Hatala; William Jungers (2019). "Sexual dimorphism in Homo erectus inferred from 1.5 Ma footprints near Ileret, Kenya". Scientific Reports. 9 (1): Article number 7687. doi:10.1038/s41598-019-44060-2. PMC 6531427 . PMID 31118467.
↑ Marco Romano; Paolo Citton; Isabella Salvador; Daniele Arobba; Ivano Rellini; Marco Firpo; Fabio Negrino; Marta Zunino; Elisabetta Starnini; Marco Avanzini (2019). "A multidisciplinary approach to a unique palaeolithic human ichnological record from Italy (Bàsura Cave)". eLife. 8: e45204. doi: 10.7554/eLife.45204 . PMC 6548500 . PMID 31084704.
↑ Chad A. Morgan; Charles M. Henderson; Brian R. Pratt (2019). "A giant Protopaleodictyon from the Middle Cambrian of western Canada". Ichnos: An International Journal for Plant and Animal Traces. 26 (3): 216–223. doi:10.1080/10420940.2018.1538981. S2CID 135039835.
↑ Li-Jun Zhang; Luis A. Buatois; M. Gabriela Mángano; Yong-An Qi; Chao Tai (2019). "Early Triassic trace fossils from South China marginal-marine settings: Implications for biotic recovery following the end-Permian mass extinction". GSA Bulletin. 131 (1–2): 235–251. doi:10.1130/B31867.1. S2CID 135345831.
↑ Mao Luo; G.R. Shi; Shixue Hu; Michael J. Benton; Zhong-Qiang Chen; Jinyuan Huang; Qiyue Zhang; Changyong Zhou; Wen Wen (2019). "Early Middle Triassic trace fossils from the Luoping Biota, southwestern China: Evidence of recovery from mass extinction" (PDF). Palaeogeography, Palaeoclimatology, Palaeoecology. 515: 6–22. doi:10.1016/j.palaeo.2017.11.028. hdl:1983/45af6911-1d6c-4fc9-93c6-6b6fa4cb82a8. S2CID 134415362. Archived from the original (PDF) on 2019-04-07. Retrieved 2019-04-07.
↑ Wangzhong Zhan; Qinghua Peng; Wenbin Chen (2019). "The discovery of Paleodictyon in Upper Triassic Bagong Formation in Dongqu area of Qiangtang basin and its palaeoenvironment significance". Geological Bulletin of China. 38 (2/3): 208–212.

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[1] Andrey Ivantsov; Aleksey Nagovitsyn; Maria Zakrevskaya (2019). "Traces of locomotion of Ediacaran macroorganisms". Geosciences. 9 (9): Article 395. doi: 10.3390/geosciences9090395 .

[2] Shuhai Xiao; Zhe Chen; Chuanming Zhou; Xunlai Yuan (2019). "Surfing in and on microbial mats: Oxygen-related behavior of a terminal Ediacaran bilaterian animal". Geology. 47 (11): 1054–1058. doi: 10.1130/G46474.1 .

[3] Masakazu Nara; Koji Seike (2019). "Palaeoecology of Macaronichnus segregatis degiberti: Reconstructing the infaunal lives of the travisiid polychaetes". Palaeogeography, Palaeoclimatology, Palaeoecology. 516: 284–294. doi:10.1016/j.palaeo.2018.12.011. S2CID 134164851.

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[6] Jean-David Moreau; Georges Gand; Emmanuel Fara; Jean Galtier; Nicolas Aubert; Stéphane Fouché (2019). "Trackways of Arthropleura from the Late Pennsylvanian of Graissessac (Hérault, southern France)". Historical Biology: An International Journal of Paleobiology. 33 (7): 996–1007. doi:10.1080/08912963.2019.1675055. S2CID 208597626.

[7] Hannah C. Bird; Angela C. Milner; Anthony P. Shillito; Richard J. Butler (2019). "A lower Carboniferous (Visean) tetrapod trackway represents the earliest record of an edopoid amphibian from the UK". Journal of the Geological Society. 177 (2): 276–282. doi:10.1144/jgs2019-149. S2CID 213393740.

[8] Paolo Citton; Ausonio Ronchi; Simone Maganuco; Martina Caratelli; Umberto Nicosia; Eva Sacchi; Marco Romano (2019). "First tetrapod footprints from the Permian of Sardinia and their palaeontological and stratigraphical significance". Geological Journal. 54 (4): 2084–2098. doi:10.1002/gj.3285. S2CID 135216684.

[9] Lorenzo Marchetti; Sebastian Voigt; Spencer G. Lucas; Heitor Francischini; Paula Dentzien-Dias; Roberto Sacchi; Marco Mangiacotti; Stefano Scali; Andrea Gazzola; Ausonio Ronchi; Amanda Millhouse (2019). "Tetrapod ichnotaxonomy in eolian paleoenvironments (Coconino and De Chelly formations, Arizona) and late Cisuralian (Permian) sauropsid radiation". Earth-Science Reviews. 190: 148–170. doi: 10.1016/j.earscirev.2018.12.011 .

[10] Heitor Francischini; Spencer G. Lucas; Sebastian Voigt; Lorenzo Marchetti; Vincent L. Santucci; Cassandra L. Knight; John R. Wood; Paula Dentzien-Dias; Cesar L. Schultz (2019). "On the presence of Ichniotherium in the Coconino Sandstone (Cisuralian) of the Grand Canyon and remarks on the occupation of deserts by non-amniote tetrapods". PalZ. 94 (1): 207–225. doi:10.1007/s12542-019-00450-5. S2CID 181356924.

[11] Lorenzo Marchetti; Sebastian Voigt; Spencer G. Lucas (2019). "An anatomy-consistent study of the Lopingian eolian tracks of Germany and Scotland reveals the first evidence of the end-Guadalupian mass extinction at low paleolatitudes of Pangea". Gondwana Research. 73: 32–53. doi:10.1016/j.gr.2019.03.013. S2CID 146780505.

[12] Lorenzo Marchetti; Sebastian Voigt; Hendrik Klein (2019). "Revision of Late Permian tetrapod tracks from the Dolomites (Trentino-Alto Adige, Italy)". Historical Biology: An International Journal of Paleobiology. 31 (6): 748–783. doi:10.1080/08912963.2017.1391806. S2CID 134771751.

[13] Lorenzo Marchetti; Hendrik Klein; Michael Buchwitz; Ausonio Ronchi; Roger M.H. Smith; William J. De Klerk; Lara Sciscio; Gideon H. Groenewald (2019). "Permian-Triassic vertebrate footprints from South Africa: Ichnotaxonomy, producers and biostratigraphy through two major faunal crises". Gondwana Research. 72: 139–168. doi: 10.1016/j.gr.2019.03.009 .

[14] Abdelouahed Lagnaoui; Ricardo N. Melchor; Eduardo S. Bellosi; Pablo M. Villegas; Nahuel Espinoza; Aldo M. Umazano (2019). "Middle Triassic Pentasauropus-dominated ichnofauna from western Gondwana: Ichnotaxonomy, palaeoenvironment, biostratigraphy and palaeobiogeography". Palaeogeography, Palaeoclimatology, Palaeoecology. 524: 41–61. doi:10.1016/j.palaeo.2019.03.020. S2CID 133757156.

[15] Kyung Soo Kim; Martin G. Lockley; Jong Deock Lim; Dong Hee Kim (2019). "The oldest known anuran (frog) trackways from the Jinju Formation, Lower Cretaceous, Korea". Cretaceous Research. 96: 142–148. doi:10.1016/j.cretres.2018.12.008. S2CID 134521999.

[16] Kyung Soo Kim; Jong Deock Lim; Martin G. Lockley; Dong Hee Kim; Laura Piñuela; Jae Sang Yoo (2019). "Largest Cretaceous lizard track assemblage, new morphotypes and longest trackways comprise diverse components of an exceptional Korean Konservat-Lagerstätten ichnofauna". Scientific Reports. 9 (1): Article number 13278. doi:10.1038/s41598-019-49442-0. PMC 6746761 . PMID 31527673.

[17] Martin G. Lockley; Hayley C. Cawthra; Jan C. De Vynck; Charles W. Helm; Richard T. McCrea; Ronel Nel (2019). "New fossil sea turtle trackway morphotypes from the Pleistocene of South Africa highlight role of ichnology in turtle paleobiology". Quaternary Research. 92 (3): 626–640. doi: 10.1017/qua.2019.40 .

[18] Abdelkbir Hminna; Hendrik Klein; Tariq Zouheir; Abdelouahed Lagnaoui; Hafid Saber; Jens N. Lallensack; Mostafa Oukassou (2019). "The Late Triassic archosaur ichnogenus Brachychirotherium: first complete step cycles from Morocco, North Africa, with implications for trackmaker identification and ichnotaxonomy". Historical Biology: An International Journal of Paleobiology. 33 (5): 1–14. doi:10.1080/08912963.2019.1658097. S2CID 202864611.

[19] Lida Xing; Hendrik Klein (2019). "Chirotherium and first Asian Rhynchosauroides tetrapod trackways from the Middle Triassic of Yunnan, China". Historical Biology: An International Journal of Paleobiology. 33 (6): 791–801. doi:10.1080/08912963.2019.1661409. S2CID 202863096.

[20] J. Hedge; A. P. Shillito; N. S. Davies; R. J. Butler; I. J. Sansom (2019). "Invertebrate trace fossils from the Alveley Member, Salop Formation (Pennsylvanian, Carboniferous), Shropshire, UK" (PDF). Proceedings of the Geologists' Association. 130: 103–111. doi:10.1016/j.pgeola.2018.10.002. S2CID 134109139.

[21] Agustín G. Martinelli; Giorgio Basilici; Lucas E. Fiorelli; Carolina Klock; Joachim Karfunkel; Ariela Costa Diniz; Marcus V.T. Soares; André Marconato; João Ismael da Silva; Luiz Carlos B. Ribeiro; Thiago S. Marinho (2019). "Palaeoecological implications of an Upper Cretaceous tetrapod burrow (Bauru Basin; Peirópolis, Minas Gerais, Brazil)". Palaeogeography, Palaeoclimatology, Palaeoecology. 528: 147–159. doi:10.1016/j.palaeo.2019.05.015. S2CID 181458875.

[22] Yuong-Nam Lee; Hang-Jae Lee; Yoshitsugu Kobayashi; Ariana Paulina-Carabajal; Rinchen Barsbold; Anthony R. Fiorillo; Khishigjav Tsogtbaatar (2019). "Unusual locomotion behaviour preserved within a crocodyliform trackway from the Upper Cretaceous Bayanshiree Formation of Mongolia and its palaeobiological implications". Palaeogeography, Palaeoclimatology, Palaeoecology. 533: Article 109239. doi:10.1016/j.palaeo.2019.109239. S2CID 197584839.

[23] Mireia Costa-Pérez; José Joaquín Moratalla; Jesús Marugán-Lobón (2019). "Studying bipedal dinosaur trackways using geometric morphometrics". Palaeontologia Electronica. 22 (3): Article number 22.3.pvc–3. doi: 10.26879/980 .

[24] Da-Qing Li; Li-Da Xing; Martin G. Lockley; Anthony Romilio; Jing-Tao Yang; Long-Feng Li (2019). "The first theropod tracks from the Middle Jurassic of Gansu, Northwest China: new and rare evidence of quadrupedal progression in theropod dinosaurs". Journal of Palaeogeography. 8 (1): Article 10. doi: 10.1186/s42501-019-0028-4 .

[25] Matteo Belvedere; Diego Castanera; Christian A. Meyer; Daniel Marty; Octavio Mateus; Bruno Camilo Silva; Vanda F. Santos; Alberto Cobos (2019). "Late Jurassic globetrotters compared: A closer look at large and giant theropod tracks of North Africa and Europe". Journal of African Earth Sciences. 158: Article 103547. doi:10.1016/j.jafrearsci.2019.103547. S2CID 198400391.

[26] Anthony P. Shillito; Neil S. Davies (2019). "Dinosaur-landscape interactions at a diverse Early Cretaceous tracksite (Lee Ness Sandstone, Ashdown Formation, southern England)". Palaeogeography, Palaeoclimatology, Palaeoecology. 514: 593–612. doi:10.1016/j.palaeo.2018.11.018. S2CID 135081484.

[27] Ricardo N. Melchor; David L. Rivarola; Aldo Martín Umazano; Magdalena Nalín Moyano; Fátima R. Mendoza Belmontes (2019). "Elusive Cretaceous Gondwanan theropods: the footprint evidence from central Argentina". Cretaceous Research. 97: 125–142. doi:10.1016/j.cretres.2019.01.004. S2CID 133788331.

[28] Yuta Tsukiji; Yoichi Azuma; Fumito Shiraishi; Masateru Shibata (2019). "A diverse theropod footprint assemblage from the Lower Cretaceous Kitadani Formation, Tetori Group, central Japan". Cretaceous Research. 97: 16–33. doi:10.1016/j.cretres.2019.01.003. S2CID 135285358.

[29] Kyung Soo Kim; Martin G. Lockley; Jong Deock Lim; Lida Xing (2019). "Exquisitely-preserved, high-definition skin traces in diminutive theropod tracks from the Cretaceous of Korea". Scientific Reports. 9 (1): Article number 2039. doi:10.1038/s41598-019-38633-4. PMC 6375998 . PMID 30765802.

[30] Robert E. Weems (2019). "Evidence for bipedal prosauropods as the likely Eubrontes track-makers". Ichnos: An International Journal for Plant and Animal Traces. 26 (3): 187–215. doi:10.1080/10420940.2018.1532902. S2CID 133770251.

[31] Jens N. Lallensack; Shinobu Ishigaki; Abdelouahed Lagnaoui; Michael Buchwitz; Oliver Wings (2019). "Forelimb orientation and locomotion of sauropod dinosaurs: insights from the ?Middle Jurassic Tafaytour tracksites (Argana Basin, Morocco)". Journal of Vertebrate Paleontology. 38 (5): e1512501. doi:10.1080/02724634.2018.1512501. S2CID 92247018.

[32] Mostafa Oukassou; Hendrik Klein; Abdelouahed Lagnaoui; André Charrière; Hafid Saber; Gerard D. Gierliński; Jens N. Lallensack; Abdelkbir Hminna; Ayoub Boumaalif; Ahmed Oussou; Driss Ouarhache (2019). "Polyonyx-like tracks from Middle-?Upper Jurassic red beds of Morocco: implications for sauropod communities on southern margins of Tethys". Palaeogeography, Palaeoclimatology, Palaeoecology. 536: Article 109394. doi:10.1016/j.palaeo.2019.109394. S2CID 210315305.

[33] Lida Xing; Hendrik Klein; Enze Wang; W. Scott Persons IV (2019). "Upper Jurassic dinosaur tracks from the Tianchihe Formation of Shanxi Province, China: review and new observations". Historical Biology: An International Journal of Paleobiology. 33 (6): 1–8. doi:10.1080/08912963.2019.1661408. S2CID 202857014.

[34] Lida Xing; Martin G. Lockley; Hendrik Klein; Chunyong Chou; Donghao Wang; W. Scott Persons IV (2019). "A mid-Cretaceous dinosaur track assemblage from the Hengshan Formation in central Zhejiang, China". Historical Biology: An International Journal of Paleobiology. 33 (7): 973–980. doi:10.1080/08912963.2019.1675053. S2CID 208593638.

[35] Arturo Miguel Heredia; Pablo José Pazos; Diana Elizabeth Fernández; Ignacio Díaz Martínez; Marcos Comerio (2019). "A new narrow-gauge sauropod trackway from the Cenomanian Candeleros Formation, northern Patagonia, Argentina". Cretaceous Research. 96: 70–82. doi:10.1016/j.cretres.2018.11.016. hdl: 11336/94924 . S2CID 134917409.

[36] Lida Xing; Martin G. Lockley; Hendrik Klein; Gerard D. Gierliński; Yong Ye; Jianping Zhang; W. Scott Persons IV; Tao Wang (2019). "First thyreophoran type tracks from the Middle Jurassic Chuanjie Formation of Yunnan Province, China". Ichnos: An International Journal for Plant and Animal Traces. 26 (1): 8–15. doi:10.1080/10420940.2018.1479962. S2CID 134190731.

[37] J. Pazos Pablo; González Estebenet M. Candela; E. Cocca Sergio; Dania Pascua (2019). "The oldest record of a tyreophoran track in Gondwana: Geological implications of subaerial exposure in the lower part of the Lajas Formation at the Covunco section (Neuquén Basin), Patagonia, Argentina". Journal of South American Earth Sciences. 94: Article 102198. doi:10.1016/j.jsames.2019.05.014. S2CID 181619510.

[38] A. P. Shillito; N. S. Davies (2019). "Death near the shoreline, not life on land: Ordovician arthropod trackways in the Borrowdale Volcanic Group, UK". Geology. 47: 55–58. doi:10.1130/G45663.1.

[39] Lida Xing; Martin G. Lockley; Tianming Du; Lijun Zhang; Hendrik Klein; Anthony Romilio; W. Scott Persons IV; Kuan Wang; Zhenyu Li; Xiaoqiao Wan (2019). "Dinosaur tracks from the Jurassic-Cretaceous boundary Tuchengzi Formation (Hebei Province, China) used as building stones in the Chengde imperial summer resort: age, ichnology, and history". Cretaceous Research. 107: Article 104310. doi:10.1016/j.cretres.2019.104310. S2CID 210266977.

[40] Anthony R. Fiorillo; Yoshitsugu Kobayashi; Paul J. McCarthy; Tomonori Tanaka; Ronald S. Tykoski; Yuong-Nam Lee; Ryuji Takasaki; Junki Yoshida (2019). "Dinosaur ichnology and sedimentology of the Chignik Formation (Upper Cretaceous), Aniakchak National Monument, southwestern Alaska; Further insights on habitat preferences of high-latitude hadrosaurs". PLOS ONE. 14 (10): e0223471. doi: 10.1371/journal.pone.0223471 . PMC 6821036 . PMID 31665132.

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