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Dacromya
''Dacryomya'', or the pointed nutclam is an extinct genus of small-sized (approximately long) saltwater clams, marine bivalve molluscs in the nutclam family Nuculanidae. The size and shape of the shells of species in this genus are reminiscent of broad apple pips. Distribution ''Dacryomya'' lived during the Lower and Middle Jurassic, possibly throughout the Tethys Faunal Province.W. Kiessling, D. K. Pandey, M. Schemm-Gregory, H. Mewis, and M. Aberhan. 2011. "Marine benthic invertebrates from the Upper Jurassic of northern Ethiopia and their biogeographic affinities". ''Journal of African Earth Sciences'' 59:195-214 Fossils of ''D. lacryma '' are known from the very late Lower Jurassic (Toarcian) of France (Causes, 44.3° N, 3.3° E);Fürsich, F.T., R. Berndt, T. Scheuer and M. Gahr. Comparative ecological analysis of Toarcian (Lower Jurassic) benthic faunas from southern France and east-central Spain. Lethaia 34:169-199. 200/ref> the early middle Middle Jurassic (Bajocian) of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nuculanidae
Nuculanidae is a family of small saltwater clams, marine bivalve molluscs in the order Nuculanida. Species in this family are found in all seas, from shallow to deep water. Genera and species Genera and species within the family Nuculanidae include: * '' Acutispinula'' ** '' Acutispinula hilleri'' (Allen & Sanders, 1982) ** '' Acutispinula scheltemai'' (Allen & Sanders, 1982) * '' Adrana'' H. Adams & A. Adams, 1858 * '' Jupiteria'' ** '' Jupiteria manawatawhia'' Powell, 1937) ** '' Jupiteria wolffi'' Dell, 1956 ** '' Jupiteria zealedaformis'' Dell, 1953 * '' Ledella'' ** '' Ledella aberrata'' Allen & Sanders, 1996 ** '' Ledella finlayi'' Powell, 1935 ** '' Ledella herdmani'' Dell, 1953 ** '' Ledella jamesi'' Allen & Hannah, 1989 ** '' Ledella librata'' Dell, 1952 ** '' Ledella pustulosa'' Allen & Hannah, 1989 ** '' Ledella sublevis'' A. E. Verrill & Bush, 1898 ** '' Ledella ultima'' ( E. A. Smith, 1885) * '' Lembulus'' Link, 1807 ** '' Lembulus pellus'' (Linnaeus, 176 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Jurassic
The Jurassic ( ) is a Geological period, geologic period and System (stratigraphy), stratigraphic system that spanned from the end of the Triassic Period million years ago (Mya) to the beginning of the Cretaceous Period, approximately Mya. The Jurassic constitutes the middle period of the Mesozoic, Mesozoic Era and is named after the Jura Mountains, where limestone strata from the period were first identified. The start of the Jurassic was marked by the major Triassic–Jurassic extinction event, associated with the eruption of the Central Atlantic magmatic province, Central Atlantic Magmatic Province. The beginning of the Toarcian Stage started around 183 million years ago and is marked by an extinction event associated with widespread Anoxic event, oceanic anoxia, ocean acidification, and elevated temperatures likely caused by the eruption of the Karoo-Ferrar, Karoo-Ferrar large igneous provinces. The end of the Jurassic, however, has no clear boundary with the Cretaceous and i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Toarcian
The Toarcian is, in the ICS' geologic timescale, an age and stage in the Early or Lower Jurassic. It spans the time between 182.7 Ma (million years ago) and 174.1 Ma. It follows the Pliensbachian and is followed by the Aalenian. The Toarcian Age began with the Toarcian turnover, the extinction event that sets its fossil faunas apart from the previous Pliensbachian age. It is believed to have ended with a global cooling event known as the Comptum Cooling Event, although whether it represented a worldwide event is controversial. Stratigraphic definitions The Toarcian takes its name from the city of Thouars, just south of Saumur in the Loire Valley of France. The stage was introduced by French palaeontologist Alcide d'Orbigny in 1842, after examining rock strata of this age in a quarry near Thouars. In Europe this period is represented by the upper part of the Lias. The base of the Toarcian is defined as the place in the stratigraphic record where the ammonite genus '' Eoda ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Jurassic Animals Of Europe
The Jurassic ( ) is a geologic period and stratigraphic system that spanned from the end of the Triassic Period million years ago (Mya) to the beginning of the Cretaceous Period, approximately Mya. The Jurassic constitutes the middle period of the Mesozoic Era and is named after the Jura Mountains, where limestone strata from the period were first identified. The start of the Jurassic was marked by the major Triassic–Jurassic extinction event, associated with the eruption of the Central Atlantic Magmatic Province. The beginning of the Toarcian Stage started around 183 million years ago and is marked by an extinction event associated with widespread oceanic anoxia, ocean acidification, and elevated temperatures likely caused by the eruption of the Karoo-Ferrar large igneous provinces. The end of the Jurassic, however, has no clear boundary with the Cretaceous and is the only boundary between geological periods to remain formally undefined. By the beginning of the Jurassic, t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
