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The skull can be separated from that of the Ship Rat (R. rattus) by the more prominent temporal ridges of the Common Rat, giving its skull a more angular, robust look, and on length. In adults, Common Rat CB usually 43mm or greater, Ship Rat 43mm or less, but there may be some overlap.
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1. Common Rat, lateral view
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Internet Resources
WR :
MS :
UM
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Taxonomy:
Order - Rodentia (gnawers)
Suborder - Myomorpha (mouse-like)
Family - Muridae
(mice) Scientific Name:
Rattus "Rat" (Latin)
norvegicus "Norwegian" (Latin)
Dental Formula
U 1.0.0.3. - L 1.0.0.3.
Measurements: (explained)
Condylobasal length - 45.8mm
Zygomatic width - 25.1mm
Jaw Length - 25.7mm
Collection Data
Stage - Adult
Date collected - 1991
Area collected - Northumberland
Collection ref. - 91.005
Source - trapped
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