''Glikmanius'' is an extinct

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 ctenacanth

cartilaginous fish Chondrichthyes (; ) is a class of jawed fish that contains the cartilaginous fish or chondrichthyans, which all have skeletons primarily composed of cartilage. They can be contrasted with the Osteichthyes or ''bony fish'', which have skeleto ...

which lived in the

Carboniferous The Carboniferous ( ) is a Geologic time scale, geologic period and System (stratigraphy), system of the Paleozoic era (geology), era that spans 60 million years, from the end of the Devonian Period Ma (million years ago) to the beginning of the ...

North America North America is a continent in the Northern Hemisphere, Northern and Western Hemisphere, Western hemispheres. North America is bordered to the north by the Arctic Ocean, to the east by the Atlantic Ocean, to the southeast by South Ameri ...

and

Russia Russia, or the Russian Federation, is a country spanning Eastern Europe and North Asia. It is the list of countries and dependencies by area, largest country in the world, and extends across Time in Russia, eleven time zones, sharing Borders ...

. Skeletal remains attributed to the genus are known from

Nebraska Nebraska ( ) is a landlocked U.S. state, state in the Midwestern United States, Midwestern region of the United States. It borders South Dakota to the north; Iowa to the east and Missouri to the southeast, both across the Missouri River; Ka ...

USA The United States of America (USA), also known as the United States (U.S.) or America, is a country primarily located in North America. It is a federal republic of 50 states and a federal capital district, Washington, D.C. The 48 contiguous ...

. ''Glikmanius'' is named in honour of the

Russian Russian(s) may refer to: *Russians (), an ethnic group of the East Slavic peoples, primarily living in Russia and neighboring countries *A citizen of Russia *Russian language, the most widely spoken of the Slavic languages *''The Russians'', a b ...

palaeontologist Paleontology, also spelled as palaeontology or palæontology, is the scientific study of the life of the past, mainly but not exclusively through the study of fossils. Paleontologists use fossils as a means to classify organisms, measure geolo ...

, Dr. Leonid Glikman, who studied the genus and was "the first to propose its

ctenacanthiform Ctenacanthiformes is an Extinction, extinct Order (biology), order of cartilaginous fish. They possessed ornamented fin spines at the front of their dorsal fins and cladodont-type dentition, that is typically of a grasping morphology, though some ...

affinity". ''G. careforum'' may have reached lengths of , while ''G. occidentalis'' may have reached lengths of over , making it one the largest marine predators of its time. left, Tooth of ''Glikmanius occidentalis.''

References

"Ctenacanthiform Cladodont Teeth from the Lower Permian Wichita Group, Texas, U.S.A."
''Acta Geologica Polonica'', Vol. 58 (2008), No. 2, pp. 205–209

External links

3D model of scanned and labeled ''G. careforum'' fossils
at

Sketchfab Sketchfab is a 3D asset website used to publish, share, discover, buy and sell 3D model, 3D, Virtual reality, VR and Augmented reality, AR content. It provides a viewer based on the WebGL and WebXR technologies that allows users to display 3D m ...

Ctenacanthiformes Carboniferous cartilaginous fish Carboniferous fish of Europe Carboniferous fish of North America Prehistoric cartilaginous fish genera {{paleo-cartilaginous-fish-stub