Arvicola terrestris The Pleistocene Epoch is part of the geologic timescale. ... Scientific classification or biological classification is how biologists group and categorize extinct and living species of organisms. ... Phyla Subkingdom Parazoa Porifera (sponges) Subkingdom Agnotozoa Placozoa Orthonectida Rhombozoa Subkingdom Metazoa Radiata Cnidaria Ctenophora - Comb jellies Bilateria Protostomia Acoelomorpha Platyhelminthes - Flatworms Nemertina - Ribbon worms Gastrotricha Gnathostomulida - Jawed worms Micrognathozoa Rotifera - Rotifers Acanthocephala Priapulida Kinorhyncha Loricifera Entoprocta Nematoda - Roundworms Nematomorpha - Horsehair worms Cycliophora Mollusca - Mollusks Sipuncula - Peanut worms Annelida - Segmented... 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... Orders Subclass Monotremata Monotremata Subclass Marsupialia Didelphimorphia Paucituberculata Microbiotheria Dasyuromorphia Peramelemorphia Notoryctemorphia Diprotodontia Subclass Placentalia Xenarthra Dermoptera Desmostylia Scandentia Primates Rodentia Lagomorpha Insectivora Chiroptera Pholidota Carnivora Perissodactyla Artiodactyla Cetacea Afrosoricida Macroscelidea Tubulidentata Hyracoidea Proboscidea Sirenia The mammals are the class of vertebrate animals primarily characterized by the presence of mammary... Families Many, see text The order Rodentia is the most numerous of all the branches on the mammal family tree. ... Subfamilies see text Cricetidae is a family of rodents in the large and complex superfamily Muroidea. ... Genera see text Arvicolinae is a subfamily of rodents that includes the voles, lemmings, and muskrats. ... In biology, binomial nomenclature is the formal method of naming species. ... Trinomial nomenclature is a taxonomic naming system that extends the standard system of binomial nomenclature by adding a third taxon. ... In scientific classification, a type is a specimen or description that corresponds to a taxon (a group of organisms), and helps to identify which organisms may be referred to with that name. ...
The water voles are large voles in the genus Arvicola. They are found in both aquatic and dry habitat through Europe and much of northern Asia. In scientific classification, synonymy is the existence of multiple systematic names to label the same organism. ... Genera Microtus Myodes Phenacomys Lagurus Arvicola A vole is a small rodent resembling a mouse but with a stouter body; a shorter, hairy tail; and smaller ears and eyes. ... Europe is conventionally considered one of the seven continents which, in this case, is more a cultural and political distinction than a physiogeographic one. ... World map showing Asia. ...
Head and body length are 12-22 cm, tail length is 6.5-12.5 cm, and the weight is 70-250 g. The animals may exhibit indeterminate growth. They are thick-furred and have hairy fringe on feet that improves their swimming ability. This inflorescence of the terrestrial orchid Spathoglottis plicata shows indeterminate growth; note that the opening of flowers and production of fruits is proceding upwards on the shoot. ...
Species
Southwestern Water Vole - Arvicola sapidus
European Water Vole - Arvicola terrestris
References
Nowak, R. M. 1999. Walker's Mammals of the World, Vol. 2. Johns Hopkins University Press, London.