†Eocastoroides †Steneofiber †Neatocastor †Asiacastor †Youngofiber †Trogontherium †Eucastor †Schreuderia †Dipoides †Boreofiber †Romanocastor †Zamolxifiber †Procastoroides †Castoroides †Paradipoides †Agnotocastor †Capacikala †Pseudopalaeocastor †Fossorcastor †Euhapsis †Propalaeocastor †Palaeomys †Palaeocastor †Hystricops Castor The Eocene epoch (56-34 MYA) is a major division of the geologic timescale and the second epoch of the Palaeogene period in the Cenozoic era. ... Public domain picture from U.S. Fish and Wildlife Service File history Legend: (cur) = this is the current file, (del) = delete this old version, (rev) = revert to this old version. ... Binomial name Castor canadensis Kuhl, 1820 The American Beaver (Castor canadensis) is a large semi-aquatic rodent native to Canada, most of the United States and parts of northern Mexico. ... Jump to: navigation, search Scientific classification or biological classification is how biologists group and categorize extinct and living species of organisms. ... Jump to: navigation, search Phyla Porifera (sponges) Ctenophora (comb jellies) Cnidaria Placozoa Subregnum Bilateria Acoelomorpha Orthonectida Rhombozoa Myxozoa Superphylum Deuterostomia Chordata (vertebrates, etc. ... Typical Classes Subphylum Urochordata - Tunicates Ascidiacea Thaliacea Larvacea Subphylum Cephalochordata - Lancelets Subphylum Myxini - Hagfishes Subphylum Vertebrata - Vertebrates Petromyzontida - Lampreys Placodermi (extinct) Chondrichthyes - Cartilaginous fishes Acanthodii (extinct) Actinopterygii - Ray-finned fishes Actinistia - Coelacanths Dipnoi - Lungfishes Amphibia - Amphibians Reptilia - Reptiles Aves - Birds Mammalia - Mammals Chordates (phylum Chordata) include the vertebrates, together with... Jump to: navigation, search Orders Subclass Multituberculata (extinct) Plagiaulacida Cimolodonta Subclass Palaeoryctoides (extinct) Subclass Triconodonta (extinct) Subclass Placentalia Afrosoricida Artiodactyla Carnivora Cetacea Chiroptera Creodonta (extinct) Dermoptera Desmostylia (extinct) Embrithopoda (extinct) Hyracoidea Insectivora Lagomorpha Litopterna (extinct) Macroscelidea Notoungulata (extinct) Perissodactyla Pholidota Primates Proboscidea Rodentia Scandentia Sirenia Tubulidentata Xenarthra Subclass Marsupialia Dasyuromorphia... Families Many, see text The order Rodentia is the most numerous of all the branches on the mammal family tree. ... Infraorders Anomaluromorpha Castorimorpha Ctenodactylomorpha Geomorpha Glirimorpha Myodonta Sciurida Sciurognathi is a suborder of rodents that includes squirrels, chipmunks, beavers, and many types of mice. ... See genus (mathematics) for the use of the term in mathematics. ... Castoroides is an extinct genus of giant beavers that lived in North America during the Pleistocene. ... Jump to: navigation, search Species C. canadensis C. fiber Beavers are semi-aquatic rodents native to North America and Europe. ...
The family Castoridae contains the two living species of beaver and their fossil relatives. This was once a highly diverse group of rodents, but is now restricted to a single genus, Castor. Species C. canadensis C. fiber Beavers are semi-aquatic rodents native to North America and Europe. ... A fossil Ammonite Fossils are the mineralized remains of animals or plants or other traces such as footprints. ... Jump to: navigation, search Families See Classification Section The order Rodentia is the most numerous of all the branches on the mammal family tree. ... Jump to: navigation, search Species C. canadensis C. fiber Beavers are semi-aquatic rodents native to North America and Europe. ...
Taxonomy
The following taxonomy is based on McKenna and Bell (1997).
Incertae sedis—of uncertain position (seat)—is a term used to define a taxonomic group where its broader relationships are unknown or undefined. ... Castoroides is an extinct genus of giant beavers that lived in North America during the Pleistocene. ... Jump to: navigation, search Species C. canadensis C. fiber Beavers are semi-aquatic rodents native to North America and Europe. ...
References
McKenna, Malcolm C., and Bell, Susan K. 1997. Classification of Mammals Above the Species Level. Columbia University Press, New York, 631 pp. ISBN 0-231-11013-8
The rodent family Castoridae has an uncertain ancestry, a feature that is discussed in some detail by Romer (1966).
Thenius and Hofer (1960) also supported the notion that the true ancestry of beavers is still debated and related in their book that beavers had once been of bear-like size, in the Pleistocene.
Lavrov, L.S. and Orlov, V.N.: Karyotypes and taxonomy of modern beavers (Castor, Castoridae, Mammalia).
Feeds |
Contact