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Euthynotus Incognitus
''Euthynotus'' is an extinct genus of prehistoric marine Actinopterygii, ray-finned fish that lived in Europe during the Early Jurassic epoch. It is generally considered the basalmost Pachycormiformes, pachycormiform. It contains only a single definitive species, ''E. incognitus'' (Henri Marie Ducrotay de Blainville, de Blainville, 1818) (=''Esox incognitus'' de Blainville, 1818), known from well-preserved specimens from the Toarcian-aged Posidonia Shale of Germany.Three other species also placed in this genus by Arthur Smith Woodward, Woodward (1901), include ''E. intermedius'' Louis Agassiz, Agassiz, 1844, ''E. speciosus'' Johann Andreas Wagner, Wagner, 1860 and ''E. milloti'' (Henri Émile Sauvage, Sauvage, 1891). However, Mainwaring (1978) found these species to all be fragmentary and most likely misattributed to this genus, with ''E. intermedius'' being lost and most likely a specimen of ''Pachycormus (fish), Pachycormus'', ''E. milloti'' to be a member of ''Sauropsis'', and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Toarcian
The Toarcian is, in the International Commission on Stratigraphy, ICS' geologic timescale, an age (geology), age and stage (stratigraphy), stage in the Early Jurassic, Early or Lower Jurassic. It spans the time between 184.2 Megaannum, Ma (million years ago) and 174.7 ±0.8 Ma. It follows the Pliensbachian and is followed by the Aalenian. The Toarcian Age began with the Toarcian Oceanic Anoxic Event, a major anoxic event associated with marine extinctions and increased global temperatures 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 stratum, rock strata of this age in a quar ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
