. Bonner zoologische Beiträge : Herausgeber: Zoologisches Forschungsinstitut und Museum Alexander Koenig, Bonn. Biology; Zoology. Bonner zoologische Beiträge 56 193 Table 3. A comparison of body and skull measurements of Dendromus ruppi n. sp., D. mystacalis from the South Sudanese low- land, and the Ethiopian D. mystacalis. Mean, range, and sample size given. RTL = relative tail length. Species HB TL RTL HFL EL WT(g) GRLE M1-M3 INT BRC-W D. nippi (Olio) 71 fx 1 1014 I'4U /o IQ SI Izl Ä "i? 7 LL, 1 63-82 91-115 18-22 13-18 8-15 n 16 n 1
. Bonner zoologische Beiträge : Herausgeber: Zoologisches Forschungsinstitut und Museum Alexander Koenig, Bonn. Biology; Zoology. Bonner zoologische Beiträge 56 193 Table 3. A comparison of body and skull measurements of Dendromus ruppi n. sp., D. mystacalis from the South Sudanese low- land, and the Ethiopian D. mystacalis. Mean, range, and sample size given. RTL = relative tail length. Species HB TL RTL HFL EL WT(g) GRLE M1-M3 INT BRC-W D. nippi (Olio) 71 fx 1 1014 I'4U /o IQ SI Izl Ä "i? 7 LL, 1 63-82 91-115 18-22 13-18 8-15 n 16 n 16 n 16 n 16 n 10 n 8 n 9 n5 n 5 D. mystacalis 60 82 137% (Sudan) 53-68 72-91 16-18 11-14 n 11 n 11 n 10 n 7 n 8 n4 D. mystacalis 141% (Ethiopia) 58-76 84-108 16-20 11-18 ^ n 10 n 10 n 10 n 9 n 6 n 7 n 6 n 5. its end between the eyes. A black hair spot on the heels, as typical for the genus. The hind feet are reddish brown. The short hairs on the ears are also reddish brown. There is a small but distinct spot of white hairs at the base of the ears. The upper side of the tail is pigmented dark but bears short light bristles. Mammary formula 2 - 2 = 8. D 5 of hind foot bearing a short claw. The skull (Fig. 6) has the typical characteristics of the genus: rounded braincase, naiTow zygomatic plate and a distinct masseteric knob at its lower anterior comer. An- terior edge of supraorbital bow smooth (not chambered). Upper incisors longitudinally grooved. Ml-length about 57% of upper molar row, M2 ca. 35%, M3 minute. Mo- lars (Fig. 7) rather narrow, breadth of Ml, M2, M3 clear- ly larger than in mystacalis (see below). The posterior pai1 of M1 behind its prominent t8 relatively broad in appear- ance (but similar to the same area of D. mystacalis). In most specimens t9 is worn down on the labial side and appears crater-like. Measurements. Tables 2, 3. Ecological
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