. Bonner zoologische Beiträge : Herausgeber: Zoologisches Forschungsinstitut und Museum Alexander Koenig, Bonn. Biology; Zoology. A new species of shrew from Gran Canaria 91 MB. 7,5 7,7 7,9 8,1 8,3 8,5 8,7 * C. osorio UTR x C. russula C. canariensis Fig. 11: Upper toothrow length (UTR, in mm) plotted against Maxillary breadth (MB) for samples of C. osorio n. sp., C. canariensis (Fuerteventura) and C. russula (Morocco); regres- sion lines indicated. "Kanarische Inseln", leg. V. Fric 1887; see Martin et al. 1984) is a very small animal and was supposed by us to eventually represent the
. Bonner zoologische Beiträge : Herausgeber: Zoologisches Forschungsinstitut und Museum Alexander Koenig, Bonn. Biology; Zoology. A new species of shrew from Gran Canaria 91 MB. 7,5 7,7 7,9 8,1 8,3 8,5 8,7 * C. osorio UTR x C. russula C. canariensis Fig. 11: Upper toothrow length (UTR, in mm) plotted against Maxillary breadth (MB) for samples of C. osorio n. sp., C. canariensis (Fuerteventura) and C. russula (Morocco); regres- sion lines indicated. "Kanarische Inseln", leg. V. Fric 1887; see Martin et al. 1984) is a very small animal and was supposed by us to eventually represent the new species; however, a re- examination of the specimen showed that it represents a very juvenile female but ex- hibits all the characteristic features of C. canariensis, such as the L-shaped coronoid process, the shape of the parastyle of P4, the heavy first upper incisor, and the narrow infra-orbital bridge. Also the ecology of both species is very different: while C. canariensis is abundant in semi-desert lowlands such as the "malpais", our records of C. osorio come from the most humid parts of Gran Canada. Crocidura russula is distinguished from C. osorio by larger size, slightly longer hindfeet and larger ears. Cranially the two species are well separated (Figs. 3—4): C russula lacks the cuneiform shape of the skull, the infra-orbital bridge is narrow, and the shape of the P4 and the IVh are very different (Fig. 5). Also the bimaxillary region is broader in C. russula (Fig. 11). Curiously, the form of the condylar process of the mandible (Figs. 5, 8) is more similar between the two species than between C. osorio and C. canariensis. Crocidura tarfayaensis replaces C. russula in the desert-like areas of southern Morocco and Western Sahara. From C. osorio it is distinguished by larger size, longer hindfeet, by extremely large ears, by a pale grey dorsal and a sharply contrasting white ventral coloration, long (4—6 mm) and soft hairs at back, a white tail heavi
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