Eusemius
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Eusemius is an extinct genus of prehistoric marine ray-finned fish, previously described as a macrosemiid, that lived during the Late Jurassic. It contains a single species, E. beatae, from the Tithonian-aged Eichstätt Formation of Germany. It is known from a single very small specimen, likely a juvenile, that is likely now lost. It closely resembles the co-occurring Ophiopsis and Ophiopsiella (which are now classified in the Ionoscopiformes), only differing in the non-bifurcated dorsal fin rays.
Eusemius is an extinct genus of prehistoric marine ray-finned fish, previously described as a macrosemiid, that lived during the Late Jurassic. It contains a single species, E. beatae, from the Tithonian-aged Eichstätt Formation of Germany. It is known from a single very small specimen, likely a juvenile, that is likely now lost. It closely resembles the co-occurring Ophiopsis and Ophiopsiella (which are now classified in the Ionoscopiformes), only differing in the non-bifurcated dorsal fin rays.
See also
Prehistoric fish List of prehistoric bony fish
References
Text derived from https://en.wikipedia.org/w/index.php?oldid=1313829319 under CC BY-SA 4.0; modifications have been made.