Antigyroceras | |
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Genus: | Antigyroceras Barskov, 1972 |
Antigyroceras is a genus of nautiloids in the order Discosorida, known from central Asia, that lived during Late Silurian and Early Devonian times. It is contemporary with the discosorid Endoplectoceras.
Ogmodirus is an extinct genus of plesiosaur found in the Cenomanian-Turonian Greenhorn Limestone of Kansas. The type species, O. martini, was named by Samuel Wendell Williston and Roy Lee Moodie in 1913.
Eubiodectes is an extinct genus of prehistoric bony fish that lived during the Cenomanian.
Oligopleurus is an extinct genus of prehistoric bony fish that lived during the Kimmeridgian stage of the Late Jurassic epoch.
Belemnopsis is a genus of belemnite, an extinct group of cephalopods.
Inichthys is an extinct genus of prehistoric marine bony fish that lived during the Lopingian epoch. Fossils were recovered in the Kuznetsk Basin, European Russia.
Eugnathides is an extinct genus of prehistoric bony fish that lived from the Oxfordian to the early Tithonian stage of the Late Jurassic epoch. Eugnathides may have been similar to Sphaerodontes.
Illiniichthys is an extinct genus of prehistoric bony fish that lived during the late Moscovian stage of the Pennsylvanian epoch in what is now Illinois, United States. Fossils were collected from the Mazon Creek fossil beds. The genus is named after the Illini Native American tribe.
Nozamichthys is an extinct genus of prehistoric bony fish that lived during the late Moscovian stage of the Pennsylvanian epoch in what is now Illinois, United States. Fossils were collected from the Mazon Creek fossil beds. The first part of the genus name is Mazon spelled backwards, and the second part means 'fish'.
Sundayichthys is an extinct genus of prehistoric bony fish that lived during the Carboniferous period in what is now South Africa. Fossils were recovered from the Upper Witteberg Series.
Kentuckia is an extinct genus of prehistoric bony fish.
Korutichthys is an extinct genus of prehistoric marine bony fish that lived during the Lopingian epoch in what is now Krasnoyarsk Krai, Russia. It was first referred to the family Amblypteridae, a view that was later questioned.
Osorioichthys is an extinct genus of prehistoric bony fish.
Pholidoctenus is an extinct genus of prehistoric ray-finned fish.
Pholidolepis is an extinct genus of prehistoric ray-finned fish.
Pholidophoroides is an extinct genus of prehistoric ray-finned fish.
Pholidophoropsis is an extinct genus of prehistoric ray-finned fish.
Ungulites is an extinct genus of prehistoric nautiloids. The nautiloids are a subclass of shelled cephalopods that were once diverse and numerous but are now represented by only a handful of species.
Gyroceras is an extinct genus of prehistoric nautiloids. The nautiloids are a subclass of shelled cephalopods that were once diverse and numerous but are now represented by only a handful of species.
Stearoceras is an extinct genus of prehistoric nautiloids from the Lower Pennsylvanian - Lower Permian with a fair worldwide distribution.(Kümmel 1964)
Tarasiiformes is an extinct order of prehistoric ray-finned fish.