| Ophiopetra Temporal range: | |
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| Ophiopetra lithographica | |
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| Genus: | †Ophiopetra Enay & Hess, 1962 |
| Species: | †O. lithographica |
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| Ophiopetra lithographica Enay & Hess, 1962 | |
Ophiopetra is a genus of prehistoric brittle stars. [1] It lived in lagoons in Solnhofen Plattenkalk Formation. It has only one known species, Ophiopetra lithographica.
Both Ophiopetra and O. lithographica were first described by Raymond Enay and Hans Hess in 1962, who determined that the genus belonged to the order Chilophiurida Matsumoto, 1915 (later known as the infraorder Chilophiurina) and that it was related to the families Ophiodermatidae and Ophiochitonidae. [1] In 1965, Hess then showed that the genus Aplocoma d'Orbigny, 1852 [2] was related to Ophiopetra, and proposed a new family, Aplocomidae Hess, 1965, for the two genera. [3] In 2008, Ophiopetra and another genus, OphiohybrisHess, 1964, were placed in a new subfamily, Ophiopetrinae Hess & Meyer, 2008, within Aplocomidae. [4]
Apart from O. lithographica, two further species, O. bathonicaHess, 1964 and O. oertiiHess, 1965, were formerly included in Ophiopetra; in 2013, these two species were both transferred to the new genus Eozonella Thuy, Marty & Comment, 2013. [5]
Machimosaurus is an extinct genus of machimosaurid crocodyliform from the Late Jurassic and Early Cretaceous. The type species, Machimosaurus hugii, was found in Switzerland. Other fossils have been found in England, France, Germany, Portugal, Switzerland and Tunisia. Machimosaurus rex is the largest named teleosauroid and thalattosuchian, with an estimated length of up to 7.15 m (23.5 ft). Machimosaurus is the largest known crocodyliform of the Jurassic.
Massospondylidae is a family of early massopod dinosaurs that existed in Asia, Africa, North America, South America and Antarctica during the Late Triassic to the Early Jurassic periods. Several dinosaurs have been classified as massospondylids over the years. The largest cladistic analysis of early sauropodomorphs, which was presented by Apaldetti and colleagues in November 2011, found Adeopapposaurus, Coloradisaurus, Glacialisaurus, Massospondylus, Leyesaurus and Lufengosaurus to be massospondylids. This result supports many previous analyses that tested fewer taxa. However, this analysis found the two recently described North American massopods, Sarahsaurus and Seitaad, and the South African Ignavusaurus to nest outside Massospondylidae, as opposed to some provisional proposals. Earlier in 2011, Pradhania, a sauropodomorph from India, was tested for the first time in a large cladistic analysis and was found to be a relatively basal massospondylid. Mussaurus and Xixiposaurus may also be included within Massospondylidae.
Palaeocoma is an extinct genus of brittle stars that lived during the Middle Triassic to Early Jurassic Periods. Its fossils have been found in Europe.
Sericodon is an extinct genus of teleosaurid crocodyliform from the Late Jurassic (Tithonian) of Germany and Switzerland. The genus contains a single species, S. jugleri. Sericodon was placed in 'Clade T' (Aeolodontinae) and was found to be the sister taxon to Bathysuchus, another teleosaurid.
Adeopapposaurus is a genus of plateosaurian dinosaur from the Early Jurassic Cañón del Colorado Formation of San Juan, Argentina. It was similar to Massospondylus. Four partial skeletons with two partial skulls are known.
The Reuchenette Formation is a Jurassic geologic formation in Switzerland. It is Kimmeridgian in age and predominantly consists of well stratified limestone, with lithology variable both laterally and stratigraphically including wackestones, packstones and grainstones, as well as mudstone. Dinosaur remains are among the fossils that have been recovered from the formation, including the Turiasaurian sauropod Amanzia greppini, alongside a theropod tooth belonging to Ceratosauria indet, originally assigned to Megalosaurus meriani. teleosaurid crocodyliformes are also known, including Sericodon, Proexochokefalos and Machimosaurus. The metriorhynchid thalatosuchians Torvoneustes and Dakosaurus. The hybodontid shark Asteracanthus. The thalassochelydian turtle Thalassemys and Solnhofia is known from the formation, as is the platychelyid turtles Platychelys, and the plesiochelyid turtle Plesiochelys.
Eurysternum is an extinct genus of thalassochelydian turtle. Its type species is Eurysternum wagleri, the holotype of which has since been lost and only survives in illustrations.
Paleontology or palaeontology is the study of prehistoric life forms on Earth through the examination of plant and animal fossils. This includes the study of body fossils, tracks (ichnites), burrows, cast-off parts, fossilised feces (coprolites), palynomorphs and chemical residues. Because humans have encountered fossils for millennia, paleontology has a long history both before and after becoming formalized as a science. This article records significant discoveries and events related to paleontology that occurred or were published in the year 2013.
This list, 2013 in molluscan paleontology, is a list of new taxa of ammonites and other fossil cephalopods, as well as fossil gastropods, bivalves and other molluscs that have been described during the year 2013.
This list of fossil echinoderms described in 2014 is a list of new taxa of echinoderms of every kind that have been described during the year 2014. The list only includes taxa at the level of genus or species.
Comophyllia is an extinct genus of prehistoric stony corals in the family Latomeandridae. Species are known from the Jurassic and Cretaceous. C. elegans, the type species, is from the Jurassic of France.
Paleontology or palaeontology is the study of prehistoric life forms on Earth through the examination of plant and animal fossils. This includes the study of body fossils, tracks (ichnites), burrows, cast-off parts, fossilised feces (coprolites), palynomorphs and chemical residues. Because humans have encountered fossils for millennia, paleontology has a long history both before and after becoming formalized as a science. This article records significant discoveries and events related to paleontology that occurred or were published in the year 2018.
The Sachrang Formation or "Posidonienschiefer" Formation is a geological formation of southwestern Germany, northern Switzerland, northwestern Austria, southeast Luxembourg and the Netherlands, that spans about 3 million years during the Early Jurassic period. It is known for its detailed fossils, especially sea fauna, listed below. Composed mostly by black shale, the formation is a Lagerstätte, where fossils show exceptional preservation, with a thickness that varies from about 1 m to about 40 m on the Rhine level, being on the main quarry at Holzmaden between 5 and 14 m. Some of the preserved material has been transformed into fossil hydrocarbon Jet, specially wood remains, used for jewelry. The exceptional preservation seen on the Posidonia Shale has been studied since the late 1800s, finding that a cocktail of chemical and environmental factors let to such an impressive conservation of the marine fauna. The most common theory is the changes in the oxygen level, where the different anoxic events of the Toarcian left oxygen-depleted bottom waters, with the biota dying and falling to the bottom without any predator able to eat the dead bodies.
Amanzia is a genus of turiasaurian sauropod dinosaur from the Reuchenette Formation in Moutier, Switzerland. The type and only species is Amanzia greppini, originally named as a species of Ornithopsis and Cetiosauriscus.
The Staffelegg Formation is a formation of Early Jurassic age in the Canton of Aargau of northern Switzerland. The siltstones, marls, limestones and intermittent sandstones of the formation were deposited on the Northern Tethyan Carbonate Platform (NTCP). The Staffelegg Formation has provided fossils of the ichthyosaur Eurhinosaurus longirostris and the ammonite Catacoeloceras raquinianum.
Vasum subpugillare is an extinct species of medium to large sea snail, a marine gastropod mollusk in the family Turbinellidae.
Vexillum terebelloides is an extinct species of sea snail, a marine gastropod mollusk, in the family Costellariidae, the ribbed miters.
Turricula subelegans is an extinct species of sea snail, a marine gastropod mollusk in the family Clavatulidae.
Acteon marullensis is an extinct species of sea snail, a marine gastropod mollusc in the family Acteonidae.
Admetula subevulsa is an extinct species of sea snail, a marine gastropod mollusk in the family Cancellariidae, also referred to as the nutmeg snails.
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