. Bonner zoologische Beiträge : Herausgeber: Zoologisches Forschungsinstitut und Museum Alexander Koenig, Bonn. Biology; Zoology. 386 F. Dieterlen & E. Van der Straeten. Fig. 2: O. occidentalis, holotype (left) and O. irroratus showing the different size of skulls and difference in breadth and angle of nasals. and Nigeria the question arises whether it is closely related to O. lacustris and O. bar- bouri. Description Otomys occidentalis n. sp. Holotype: SMNS 41336, skin and skull of an adult male, collected 23 March 1988 by Gerhard Nikolaus at Chappal Waddi, Gotel Mts, southeast Nigeria. E
. Bonner zoologische Beiträge : Herausgeber: Zoologisches Forschungsinstitut und Museum Alexander Koenig, Bonn. Biology; Zoology. 386 F. Dieterlen & E. Van der Straeten. Fig. 2: O. occidentalis, holotype (left) and O. irroratus showing the different size of skulls and difference in breadth and angle of nasals. and Nigeria the question arises whether it is closely related to O. lacustris and O. bar- bouri. Description Otomys occidentalis n. sp. Holotype: SMNS 41336, skin and skull of an adult male, collected 23 March 1988 by Gerhard Nikolaus at Chappal Waddi, Gotel Mts, southeast Nigeria. Etymology: Because of the extreme western distribution the name occidentalis appears well-fitting. Diagnosis: Till now smallest species of the genus. Colouration of dorsal side brown (Mt Oku) to blackish brown (Gotel Mts). Nasals small with a distinct angle and relatively small surface in the rostrate part. Laminae number in Mi five, in M^ mostly eight. Description: Pelage: In both localities colouration of the upper side is different. Those from Mt Oku are slightly reddish over a brown ground colouration. The sides are somewhat lighter due to more yellowish-tipped hairs. The underfur is silky glossy and of blackish grey colouration. Specimens of Mt Gotel are clearly darker with only a few reddish hairs among the blackish-brown ground colouration which is a little bit lightened up by yellowish-tipped hairs. Length of hairs in the middle of the back. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Zoologisches Forschungsinstitut und Museum Alexander Koenig. Bonn : Das Forschungsinstitut
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