Palaeopascichnida

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Palaeopascichnida
Temporal range: Ediacaran, 580–542  Ma [1]
Palaeopascichnus CU21.png
A fossil specimen of Palaeopascichnus, a palaeopascichnid which has now been recognised as a body fossil
Scientific classification OOjs UI icon edit-ltr.svg
Domain: Eukaryota
Kingdom: incertae sedis
Informal group:† Palaeopascichnida
Grazhdankin & Maslov, 2009 [2]
Genera

Palaeopascichnida is a proposed group, which includes all known elongated, agglutinating organisms from the Ediacaran period. The term was first used in 2009 by Grazhdankin & Maslov.

Contents

Description

A specimen of Orbisiana spumea Orbisiana spumea and grazing trips left by Kimberella.png
A specimen of Orbisiana spumea

Palaeopascichnids are agglutinating organisms, which primarily composed of globular or sausage-shaped chambers, with occasional branches seen in a majority of specimens. [3]

They were originally described as trace fossils, but further studies found this to not be the case, due to the branching of the fossils and some also being disarticulated, with chambers found separated from the rest of the body. [3] Some studies have even suggested a probably foraminiferan affinity for the palaeopascichnids. [4] [5]

Distribution

Palaeopascichnids are very widespread, being found across the globe, from the East European platform (White Sea, [6] Urals, [7] Moscow syneclise, Podolia, [8] Finnmark [9] ), to Siberia (Olenyok uplift, Uchur-Maya basin [10] ), South China (Lantian [11] ), Australia (Flinders Ranges [12] ), India (Tethys [13] ), Avalonia (Charnwood, [14] Newfoundland and Labrador [15] ), Romania (Histria Formation [16] ), Brazil (Itajaí Basin [17] ), and Oman (Fara Formation [18] ).

Taxonomy

If ratified, the group would include the following genera and species: [19]

See also

References

  1. ↑ Liu, Alexander G.; Tindal, Benjamin H. (2020). "Ediacaran macrofossils prior to the ~580 Ma Gaskiers glaciation in Newfoundland, Canada". Lethaia. 54 (2): 260–270. doi: 10.1111/let.12401 .
  2. ↑ Grazhdankin, D. V.; Maslov, A. V. (June 2009). "Sequence stratigraphy of the upper Vendian of the East European Craton". Doklady Earth Sciences. 426 (1): 517–521. doi:10.1134/S1028334X09040011.
  3. 1 2 Grazhdankin, Dmitriy (March 2014). "Patterns of Evolution of the Ediacaran Soft-Bodied Biota". Journal of Paleontology. 88 (2): 269–283. doi:10.1666/13-072.
  4. ↑ Seilacher, Adolf; Grazhdankin, Dmitri; Legouta, Anton (2003). "Ediacaran biota: The dawn of animal life in the shadow of giant protists". Paleontological Research. 7 (1): 43–54. doi:10.2517/prpsj.7.43.
  5. ↑ Kolesnikov, Anton V; Rogov, Vladimir I; Bykova, Natalia V; Danelian, Taniel; Clausen, Sébastien; Maslov, Andrey V; Grazhdankin, Dmitriy V (2018). "The oldest skeletal macroscopic organism Palaeopascichnus linearis". Precambrian Research. 316: 24–37. Bibcode:2018PreR..316...24K. doi:10.1016/j.precamres.2018.07.017. S2CID   134885946.
  6. ↑ Fedonkin, M. A. (1981). Keller, B. M. (ed.). "White Sea biota of Vendian: Precambrian non-skeletal fauna in the Russian Platform North". Transactions of the Geological Institute. 342. Moscow: Nauka: 1–100.
  7. ↑ Becker, Yu.R. & Kishka, N.V. (1989). "Открытие эдиакарской биоты на Южном Урале" [The discovery of Ediacaran biota in the Southern Urals]. In T.N. Bogdanova & L.I. Khozatsky (ed.). Теоретические и прикладные аспекты современной палеонтологии. Тезисы докладов XXXIII сессии. Всесоюзного палеонтологического общества [Theoretical and applied aspects of modern paleontology. Proceedings of the XXXIII session of the All-Union Paleontological Society.](PDF) (in Russian). Leningrad: Nauka. pp. 109–120. Archived from the original (PDF) on 2019-08-08. Retrieved 2019-08-08.{{cite book}}: CS1 maint: multiple names: authors list (link)
  8. ↑ Palij, V.M. (1976). "Ostatki besskeletnoy fauny i sledy zhiznedeyatel'nosti iz otlozheniy verkhnego dokembriya i nizhnego kembriya Podolii" [Remains of the diskeletal fauna and traces of life activity from the deposits of the Upper Precambrian and the lower Cambrian of Podilia]. Paleontologiya i stratigrafiya verkhnego dokembriya i nizhnego paleozoya yugo-zapada Vostochno-Yevropeyskoy platformy[Paleontology and Stratigraphy of the Upper Precambrian and the Lower Paleozoic of the Southwest of the Eastern European Platform] (in Russian). Kiev: Naukova Dumka. pp. 63–77.
  9. ↑ Högström, AES; Jensen, S; Palacios, T; Ebbestad, JOR (2013). "New information on the Ediacaran-Cambrian transition in the Vesteranda Group, Finnmark, northern Norway, from trace fossils and organic-walled microfossils". Norwegian Journal of Geology. 93: 95–106.
  10. ↑ Ivantsov, A. Yu. (2017). "Finds of Ediacaran-type fossils in Vendian deposits of the Yudoma Group, eastern Siberia". Doklady Earth Sciences. 472 (2): 143–146. Bibcode:2017DokES.472..143I. doi:10.1134/S1028334X17020131. S2CID   131900154.
  11. ↑ Yan, Y.; Jiang, C.; Zhang, S.; Du, S.; and Bi, Z. (1992). "Research of the Sinian System in the region of western Zhejiang, northern Jiangxi, and southern Anhui provinces". Bull. Nanjing Inst. Geol. Mineral Res. Supplementary Issue 12. Chinese Acad. Geol. Sci.: 1–105.{{cite journal}}: CS1 maint: multiple names: authors list (link)
  12. ↑ Glaessner, M. F. (1969). "Trace fossils from the Precambrian and basal Cambrian". Lethaia . 2 (4): 369–393. Bibcode:1969Letha...2..369G. doi:10.1111/j.1502-3931.1969.tb01258.x.
  13. ↑ Parcha, S. K.; Pandey, S. (2011). "Ichnofossils and their significance in the Cambrian succession of the Parahio Valley in the Spiti Basin, Tethys Himalaya, India" . Journal of Asian Earth Sciences . 42 (6): 1097–1116. Bibcode:2011JAESc..42.1097P. doi:10.1016/j.jseaes.2011.04.028.
  14. ↑ Cope, JCW (1982). "Precambrian fossils of the Carmarthen area, Dyfed". Nature in Wales . 1: 11–16.
  15. ↑ Hawco, JB; Kenchigton, CG; McIlroy, D (2021). "A quantitative and statistical discrimination of morphotaxa within the Ediacaran genus Palaeopascichnus". Papers in Palaeontology . 7 (2): 657–73. Bibcode:2021PPal....7..657H. doi:10.1002/spp2.1290. S2CID   213601701.
  16. ↑ Saint Martin, J.-P.; Charbonnier, S.; Saint Martin, S.; Cazes, L.; André, J.-P. (2025). "New records of Palaeopaschichnus Palij, 1976 from the Ediacaran of Romania" . Geodiversitas. 47 (1): 1–16. doi:10.5252/geodiversitas2025v47a1.
  17. ↑ Becker-Kerber, Bruno; Paim, Paulo Sergio Gomes; Chemale Junior, Farid; Girelli, Tiago Jonatan; da Rosa, Ana Lucia Zucatti; Albani, Abderrazak El; Osés, Gabriel Ladeira; Prado, Gustavo M.E.M.; Figueiredo, Milene; Simões, Luiz Sérgio Amarante; Pacheco, Mírian Liza Alves Forancelli (August 2020). "The oldest record of Ediacaran macrofossils in Gondwana (~563 Ma, Itajaí Basin, Brazil)". Gondwana Research. 84: 211–228. doi:10.1016/j.gr.2020.03.007.
  18. ↑ Pinto, André Jorge; Álvarez-Lloret, Pedro; Callegari, Ivan; Scharf, Andreas (July 2025). "An Ediacaran trace-like body fossil of a Palaeopascichnus specimen from Oman under 3D micro-tomography". Facies. 71 (3). doi:10.1007/s10347-025-00705-5.
  19. ↑ Kolesnikov, A. V.; Desiatkin, V. D. (2022). "Taxonomy and palaeoenvironmental distribution of palaeopascichnids" . Geological Magazine . 159 (7). Cambridge University Press: 1175–1191. Bibcode:2022GeoM..159.1175K. doi:10.1017/S0016756822000437. S2CID   249661878.
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