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Nigerium
''Nigerium'' is an extinct genus of catfish known from the early Paleogene of northern Africa. It is the earliest known member of the family Claroteidae, which is still widespread in freshwater habitats of tropical Africa. Its presence also supports the Claroteidae being the earliest occurring catfishes in Africa. It contains two known species: * †''N. wurnoense'' White, 1934 (type species) - Late Paleocene of Sokoto, Nigeria ( Dange Formation) * †''N. tamaguelense'' Longbottom, 2010 - Early Eocene of Mali ( Tamaguélelt Formation of the Trans-Saharan Seaway) In addition, a former third species "''N.''" ''gadense'' White, 1934 is known from the same Late Paleocene deposits as ''N. wurnoense''. However, White only tentatively assigned this species to ''Nigerium'', and an analysis by Murray & Holmes (2021) supported it belonging to a different genus than the other two species. Remains of ''Nigerium'' are found only in marine deposits, despite this family only occurring in fres ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Claroteidae
The Claroteidae are a family of catfish (order Siluriformes) found in Africa. This family was separated from Bagridae. However, the monophyly of the family is sometimes contested. The 9 genera contain 65 known species of claroteids. The family Auchenoglanididae was formerly considered a subfamily of this family. This group was also often formerly placed in Bagridae. A well-known species is the African big-eye catfish, '' Chrysichthys longipinnis''. Claroteids have moderately elongated bodies, usually with four pairs of barbels, an adipose fin, and strong pectoral and dorsal fin spines. The earliest known fossil member of the Claroteidae is '' Nigerium'' from the Late Paleocene and Early Eocene of Nigeria and Mali. The extinct genus '' Eaglesomia'' is also known from the Middle Eocene of Nigeria. The Late Eocene genus '' Fajumia'' from Egypt is of uncertain affinities, but most likely belongs to this group. In addition, extinct species of the extant genus '' Chrysichthys'' are ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tamaguélelt Formation
The Tamaguélelt Formation is an Ypresian, Early Eocene-aged geological formation in Mali. It comprises phosphorite sediments deposited within the Trans-Saharan seaway. Many of the preserved fossils of the formation indicate that it was a marginal marine habitat. In addition to these marine fossils, fossils of freshwater and terrestrial animals are also common in the formation, due to a vast freshwater network that regularly deposited fossils into the seaway. Fossil content Reptiles Squamata Crocodylomorpha Ray-finned fish Lobe-finned fish Mammals Proboscidea Hyracoidea Mollusca Bivalvia Cephalopoda References {{Reflist Fossiliferous stratigraphic units of Africa Ypresian Stage Paleontology in Mali Eocene Series of Africa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
