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Intermolar palatal ridges in Norway rat (Rattus norvegicus) populations from 28 American cities – the configuration of the first ridge and prevalence of dark pigmented sections
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Manfred Temme
Veröffentlicht/Copyright:
23. Oktober 2008
Abstract
The configurations of intermolar palatal ridges of 617 Norway rats (Rattus norvegicus) from 29 discrete rat populations from 28 US cities were examined and compared with palatal ridge patterns of other rodent species of the genus Rattus. This detailed study of the intermolar palatal ridges confirmed that the first intermolar ridge (I) has a distinguishing shape, which can be used as an aid in identifying Norway rats and revealed some minor morphological variations in shape, presence or absence of additional ridges, and occurrence of accessory denticles. Mammalian palatal ridges are generally flesh-colored; however, in these specimens an unusual feature was discovered, 13 of the 29 populations showed irregularly shaped, dark brown-pigmented parts of the intermolar ridges.
Published Online: 2008-10-23
Published in Print: 2008-12-01
©2008 by Walter de Gruyter Berlin New York
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Artikel in diesem Heft
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- Description of a new species of Crocidura (Soricomorpha: Soricidae) from the island of Phu Quoc, Vietnam
- New data on the endemic Patagonian long-clawed mouse Notiomys edwardsii (Rodentia: Cricetidae)
- Phylogeny, adaptation and mandible shape in Sciuridae (Rodentia, Mammalia)
- Intermolar palatal ridges in Norway rat (Rattus norvegicus) populations from 28 American cities – the configuration of the first ridge and prevalence of dark pigmented sections
- Population differences in the pigmentation of Indo-Pacific humpback dolphins, Sousa chinensis, in Chinese waters
- Small mammal assemblages and habitat distribution in the northern Junggar Basin, Xinjiang, China: a pilot survey
- Small-mammal assemblage response to deforestation and afforestation in central China
- Population characteristics of a semi-free-ranging polytocous cervid, Hydropotes inermis
- Short Notes
- First karyological and molecular study of the Hainan gymnure Neohylomys hainanensis (Erinaceomorpha: Erinaceidae)
- Noteworthy records of margay, Leopardus wiedii and ocelot, Leopardus pardalis in the state of Guanajuato, Mexico
- Four-eyed opossum (Philander opossum) predation on a coral snake (Micrurus nigrocinctus)
- A live trap model and field trial of a nutria (Rodentia) multiple capture trap
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- Contents volume 72 (2008)
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