''Dipteronotus'' is an

extinct Extinction is the termination of an organism by the death of its Endling, last member. A taxon may become Functional extinction, functionally extinct before the death of its last member if it loses the capacity to Reproduction, reproduce and ...

genus Genus (; : genera ) is a taxonomic rank above species and below family (taxonomy), family as used in the biological classification of extant taxon, living and fossil organisms as well as Virus classification#ICTV classification, viruses. In bino ...

of marine

stem Stem or STEM most commonly refers to: * Plant stem, a structural axis of a vascular plant * Stem group * Science, technology, engineering, and mathematics Stem or STEM can also refer to: Language and writing * Word stem, part of a word respon ...

neopterygian Neopterygii (from Greek νέος ''neos'' 'new' and πτέρυξ ''pteryx'' 'fin') is a subclass of ray-finned fish (Actinopterygii). Neopterygii includes the Holostei and the Teleostei, of which the latter comprise the vast majority of extant f ...

ray-finned fish Actinopterygii (; ), members of which are known as ray-finned fish or actinopterygians, is a class of bony fish that comprise over 50% of living vertebrate species. They are so called because of their lightly built fins made of webbings of sk ...

that existed during the

Middle Middle or The Middle may refer to: * Centre (geometry), the point equally distant from the outer limits. Places * Middle (sheading), a subdivision of the Isle of Man * Middle Bay (disambiguation) * Middle Brook (disambiguation) * Middle Creek ...

and

Late Triassic The Late Triassic is the third and final epoch (geology), epoch of the Triassic geologic time scale, Period in the geologic time scale, spanning the time between annum, Ma and Ma (million years ago). It is preceded by the Middle Triassic Epoch a ...

epochs In chronology and periodization, an epoch or reference epoch is an instant in time chosen as the origin of a particular calendar era. The "epoch" serves as a reference point from which time is measured. The moment of epoch is usually decided by ...

in what is now Europe (France, Germany, Italy, England) and Morocco. As a typical feature, it had several ridge scales in front of its

dorsal fin A dorsal fin is a fin on the back of most marine and freshwater vertebrates. Dorsal fins have evolved independently several times through convergent evolution adapting to marine environments, so the fins are not all homologous. They are found ...

that created a spine-like structure.

Taxonomy

The following species are known: * ''D. aculeatus'' (Jörg, 1969) - Early

Anisian In the geologic timescale, the Anisian is the lower stage (stratigraphy), stage or earliest geologic age, age of the Middle Triassic series (stratigraphy), series or geologic epoch, epoch and lasted from million years ago until million years ag ...

of France * ''D. gibbosus'' Martin, 1980 -

Carnian The Carnian (less commonly, Karnian) is the lowermost stage (stratigraphy), stage of the Upper Triassic series (stratigraphy), Series (or earliest age (geology), age of the Late Triassic Epoch (reference date), Epoch). It lasted from 237 to 227.3 ...

of Morocco ( Timezgadiouine Formation) * ''D. cyphus'' Egerton, 1854 - Late Anisian of England (

Otter Sandstone Formation The Otter Sandstone Formation is an obsolete geological unit in England, now referred to as the Helsby Sandstone Formation.http://www.bgs.ac.uk/Lexicon/lexicon.cfm?pub=HEY (BGS on-line lexicon of rock units) It preserves fossils dated to the Tr ...

) * ''D. olgiatii'' Tintori, 1990 - Late

Ladinian The Ladinian is a stage and age in the Middle Triassic series or epoch. It spans the time between Ma and ~237 Ma (million years ago). The Ladinian was preceded by the Anisian and succeeded by the Carnian (part of the Upper or Late Triassic ...

of Italy ( Meride Formation,

Monte San Giorgio Monte San Giorgio is a Swiss mountain and UNESCO World Heritage Site near the border between Switzerland and Italy. It is part of the Lugano Prealps, overlooking Lake Lugano in the Swiss Canton of Ticino. Monte San Giorgio is a wooded mountai ...

) The species ''D. ornatus'' Bürgin 1992 from the

Besano Formation The Besano Formation is a geological formation in the southern Alps of northwestern Italy and southern Switzerland. This formation, a thin but fossiliferous succession of Dolomite (rock), dolomite and Shale, black shale, is famous for its preserva ...

of Switzerland has been reassigned to the polzbergiid genus '' Stoppania''.

Synonymy

''Dipteronotus ornatus'' Bürgin, 1992 → '' Stoppania ornata'' (Bürgin, 1992)

References

External links

Bony fish in the online Sepkoski Database
Prehistoric ray-finned fish genera Prehistoric neopterygii Triassic bony fish Middle Triassic fish Late Triassic fish Triassic fish of Europe Triassic fish of Africa Anisian genus first appearances Ladinian genera Carnian genus extinctions Fossils of England Fossils of Italy Fossils of France Fossils of Morocco Fossil taxa described in 1854 {{Triassic-fish-stub

Taxonomy

Synonymy

See also

References

External links