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Agnotocastor Temporal range: Late Eocene–Early Oligocene, 37.2–26.3 Ma PreꞒ Ꞓ O S D C P T J K Pg N
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Class:	Mammalia
Order:	Rodentia
Family:	Castoridae
Tribe:	†Agnotocastorini
Genus:	†Agnotocastor Stirton, 1935
Type species
†Agnotocastor praetereadens
Species
†A. coloradensis †A. galushai †A. montanus †A. praetereadens †A. readingi

Agnotocastor is an extinct member of the beaver family Castoridae. Unlike its modern relative, this species took the place of muskrats in the rivers of North America during the Oligocene epoch. The earliest species is A. galushai, which is also the first reliable member of the Castoridae. It is known chiefly from North America, with a single record from Central Asia.

References

1. ^ "†Agnotocastor Stirton 1935". Paleobiology Database. Retrieved 23 May 2024.
2. Rybczynski, N. (27 December 2006). "Castorid phylogenetics: implications for the evolution of swimming and tree-exploitation in beavers". Journal of Mammalian Evolution. 14 (1): 1–35. doi:10.1007/s10914-006-9017-3. S2CID 33659669.
3. Emry, Robert J. (1972). "A new species of Agnotocastor (Rodentia, Castoridae) from the early Oligocene of Wyoming". American Museum Novitates (2485): 1–7.

v t e Castorimorpha
Kingdom: Animalia Phylum: Chordata Class: Mammalia Order: Rodentia
Castorimorpha Diplolophidae †Diplolophus †Floresomys †Griphomys †Jimomys †Meliakrouniomys †Schizodontomys †Texomys Castoroidea Castoridae †Migmacastor †Agnotocastorinae †Agnotocastorini Agnotocastor Neatocastor †Anchitheriomyini Anchitheriomys Oligotheriomys Propalaeocastor †Palaeocastorinae Capacikala Palaeocastor Pseudopalaeocastor †Euhapsini Euhapsis Fossorcastor †Castoroidinae Priusaulax †Castoroidini Castoroides Dipoides Monosaulax Procastoroides Prodipoides †Nothodipoidini Eucastor Microdipoides Nothodipoides †Trogontheriini Asiacastor Boreofiber Euroxenomys Trogontherium Youngofiber Castorinae Castor †Chalicomys †Hystricops †Romanofiber †Schreuderia †Sinocastor †Steneofiber †Zamolxifiber †Eutypomyidae Eutypomys Janimus Mattimys Microeutypomys †Rhizospalacidae Rhizospalax
Geomorpha †Eomyidae Simiacritomys Symplokeomys †Apeomyinae Apeomyoides Apeomys Arikareeomys Megapeomys Zophoapheomys †Eomyinae Adjidaumo Aguafriamys Asianeomys Aulolithomys Centimanomys Comancheomys Cristadjidaumo Cupressimus Eomyodon Eomyops Eomys Estramomys Japaneomys Kansasimys Keramidomys Leptodontomys Ligerimys Metadjidaumo Metanoiamys Meteomys Montanamus Namatomys Neoadjidaumo Orelladjidaumo Paradjidaumo Paranamatomys Pentabuneomys Protadjidaumo Pseudotheridomys Rhodanomys Ritteneria Ronquillomys Viejadjidaumo †Yoderimyinae Litoyoderimys Yoderimys Zaisaneomys Zemiodontomys Geomyoidea †Griphomys †Meliakrouniomys †Florentiamyidae Ecclesimus Fanimus Florentiamys Hitonkala Kirkomys Sanctimus †Heliscomyidae Apletotomeus Heliscomys Passaliscomys Tylionomys Heteromyidae Dipodomyinae †Aurimys Dipodomys Microdipodops Heteromyinae †Diprionomys Heteromys †Metaliomys Perognathinae Chaetodipus Perognathus Geomyidae †Entoptychinae Entoptychus Gregorymys Pleurolicus Ziamys Geomyinae Cratogeomys Geomys Heterogeomys Orthogeomys Pappogeomys Thomomys Zygogeomys

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