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A Chinen, A
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Agriculture, Biological Sciences & Forestry Other

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MORPHOLOGICAL VARIATION OF WHITEHEAD’S RAT Maxomys whiteheadi (Thomas, 1894) (RODENTIA: MURIDAE) FROM KALIMANTAN AND SUMATRA Sinaga, M. H.; Gorog, A J; Chinen, A
ZOO INDONESIA Vol 16, No 2 (2007): November 2007
Publisher : Masyarakat Zoologi Indonesia

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Abstract

We conducted a study of morphological variation in Whitehead’s rat (Maxomys whiteheadi) based on specimens available at the Museum Zoologicum Bogoriense. A total of 224 adult specimens from the Indonesian island’s of Sumatra and Kalimantan were examined using measurements of 17 skull and four external characters. Multiple analyses of variance demonstrated that 20 of characters measured varied significantly with location. Only breadth of zygomatic plate did not show a significant effect by location. One character, hind foot length, was significantly affected by sex, and the characters head and body length, breadth of braincase, and breadth of molar 1 showed a significant interaction (p< 0,05) between sex and location. Three distinct morphological groups of M. whiteheadi were recognized within Kalimantan using discriminant function analysis. These were: a West and East Kalimantan group; a Central Kalimantan group; and a North East Kalimantan group. No distinct morphological groups were observed among the Sumatra specimens. The discriminant analysis indicated that most of the variation (79,9%) distinguished the Kalimantan and Sumatra populations from one another.
Co-Authors A J Gorog, A J M. H. Sinaga, M. H.