. Bonner zoologische Beiträge : Herausgeber: Zoologisches Forschungsinstitut und Museum Alexander Koenig, Bonn. Biology; Zoology. New Desmomys from Ethiopia 323 Description: The hairs of the dorsal fur of Desmomys yaldeni n. sp. measure 11 mm in average (vs. 16 mm in D. harringtoni). The colouration of the dorsal region is dark brownish-agouti; the directed hairs are bicoloured with grey basal third and black terminal two-thirds (in D. harringtoni those have grey basal half and black terminal half). The guard hairs in D. yaldeni are grey at base and black in distal half, with a rufous subtermi
. Bonner zoologische Beiträge : Herausgeber: Zoologisches Forschungsinstitut und Museum Alexander Koenig, Bonn. Biology; Zoology. New Desmomys from Ethiopia 323 Description: The hairs of the dorsal fur of Desmomys yaldeni n. sp. measure 11 mm in average (vs. 16 mm in D. harringtoni). The colouration of the dorsal region is dark brownish-agouti; the directed hairs are bicoloured with grey basal third and black terminal two-thirds (in D. harringtoni those have grey basal half and black terminal half). The guard hairs in D. yaldeni are grey at base and black in distal half, with a rufous subterminal band, and black tips which produce "speckled" appear-ance. The ventral pelage is whitish with yellowish central longi- tudinal band, the hairs are grey at the base, white at tip. The underfur of ventral pelage is grey. The ears are blackish, their inner surface is cover- ed with short rufous hairs. The dorsal surface of the forefeet is blackish- rufous, the fingers are black; the dor- sal surface of hindfeet is black (in D. harringtoni the dorsal surface of the hindfeet is rufous). The claws are blackish. The tail is relatively long (ca. 115% of HB); the hairs are black on the upper tail surface and yellow on the lower surface, how- ever, since they are relatively short the tail does not appear bicoloured (as in D. harringtoni). The shape of the skull is similar to the generalized configuration found in both Pelomys and Desmomys (Fig. 8). The dental pattern is typical of Desmomys: upper incisors are ridged (not grooved as are those of Pelomys), ridge-like cusp t9 connects central cusp t8 with labial cusp t6 on the first and second upper molars, ridge-like cusp t7 is present on the second upper molar and cusp t5 on the third upper molar is enlarged. On average, the new species is smaller than D. harringtoni (Table 1). The diffe- rences are statistically significant for the following cranial measurements: LoM^"^, , Mißr, BM^s (p < ); LoMd, DLNC
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