In rodents, incisor procumbency refers to the orientation of the upper incisor, defined by the position of the cutting edge of the incisor relative to the vertical plane of the incisors. Proodont (or procumbent) incisors have the cutting edge in front of the vertical plane, orthodont teeth have it perpendicular to the plane, opisthodont incisors have it behind the plane, and hyper-opisthodont teeth have the cutting edge even behind the back of the alveolus of the incisor.[2]
Steppan, S.J. 1995. Revision of the tribe Phyllotini (Rodentia: Sigmodontinae), with a phylogenetic hypothesis for the Sigmodontinae. Fieldiana Zoology 80:1–112.
Weksler, M. 2006. Phylogenetic relationships of oryzomyine rodents (Muroidea: Sigmodontinae): separate and combined analyses of morphological and molecular data. Bulletin of the American Museum of Natural History 296:1–149.
January 01, 1970
incisor, procumbency, rodents, incisor, procumbency, refers, orientation, upper, incisor, defined, position, cutting, edge, incisor, relative, vertical, plane, incisors, proodont, procumbent, incisors, have, cutting, edge, front, vertical, plane, orthodont, te. In rodents incisor procumbency refers to the orientation of the upper incisor defined by the position of the cutting edge of the incisor relative to the vertical plane of the incisors Proodont or procumbent incisors have the cutting edge in front of the vertical plane orthodont teeth have it perpendicular to the plane opisthodont incisors have it behind the plane and hyper opisthodont teeth have the cutting edge even behind the back of the alveolus of the incisor 2 Mindomys hammondi has orthodont upper incisors 1 The marsh rice rat Oryzomys palustris has opisthodont upper incisors 1 Phyllotini are mostly opisthodont but Auliscomys and Galenomys are orthodont and have sometimes even been described as proodont and Eligmodontia Loxodontomys and some species of Calomys are hyper opisthodont Irenomys Reithrodon and Neotomys formerly classified as phyllotines are also hyper opisthodont 3 Oryzomyini are also mostly opisthodont but Amphinectomys savamis Handleyomys fuscatus Melanomys caliginosus Mindomys hammondi Scolomys melanops and Sigmodontomys aphrastus are orthodont 1 References edit a b c Weksler 2006 p 43 Steppan 1995 pp 16 17 Steppan 1995 p 18Literature cited editSteppan S J 1995 Revision of the tribe Phyllotini Rodentia Sigmodontinae with a phylogenetic hypothesis for the Sigmodontinae Fieldiana Zoology 80 1 112 Weksler M 2006 Phylogenetic relationships of oryzomyine rodents Muroidea Sigmodontinae separate and combined analyses of morphological and molecular data Bulletin of the American Museum of Natural History 296 1 149 Retrieved from https en wikipedia org w index php title Incisor procumbency amp oldid 1143496598, wikipedia, wiki, book, books, library,
