. Bonner zoologische Beiträge : Herausgeber: Zoologisches Forschungsinstitut und Museum Alexander Koenig, Bonn. Biology; Zoology. Bonner zoologische Beiträge 56 skulls of the specimens at Harvard (MCZ 45 256) was not damaged (measurements in Table 4) and the other (MCZ 45 265) had already been repaired by MCZ staff when I measured it in 1988 (Table 4). The occurrence of D. me- somelas (now D. insignis) in the mountains of South Su- dan could be expected, because D. insignis was already known then from high altitudes of neighbouring Ethiopia, Kenya, and Uganda. Besides the Imatong Mts., mountai


. Bonner zoologische Beiträge : Herausgeber: Zoologisches Forschungsinstitut und Museum Alexander Koenig, Bonn. Biology; Zoology. Bonner zoologische Beiträge 56 skulls of the specimens at Harvard (MCZ 45 256) was not damaged (measurements in Table 4) and the other (MCZ 45 265) had already been repaired by MCZ staff when I measured it in 1988 (Table 4). The occurrence of D. me- somelas (now D. insignis) in the mountains of South Su- dan could be expected, because D. insignis was already known then from high altitudes of neighbouring Ethiopia, Kenya, and Uganda. Besides the Imatong Mts., mountains neighbouring to the east (Dongotona and Didinga Mts.) could also be popu- lated by D. riippi, at least above 1800 m. For the present, however, D. nippi must be regarded as a species endem- ic to the Imatong Mts. which became isolated as a result of climatic changes during a drier Pleistocene postglacial/pluvial phase in Equatorial Africa (Rupp 1980; LiviMGSTONE 1975). Etymology. I dedicate this new species to my deceased friend and colleague Hans G. Rupp. Hans died on 15 June 1979 at the age of 32, after several weeks of severe ill- ness in a hospital in Nairobi/Kenya, to where he had been transported from South Sudan. As a student of zoology at the University of Tiibingen,Germany, he had begun ex- tensive fieldwork for his doctoral thesis on rodents and their entoparasites in southern Sudan 17 months before. In the early 1970s he undertook a number of research trav- els to Ethiopia and published the results about systemat- ics, distribution and ecology of Ethiopian rodents (Die- TERLEN & Rupp 1976, 1978; Rupp 1980). Species of Dendromiis in Ethiopia Four species of climbing mice are known within the ter- ritory of Ethiopia: Dendromits mystacalis (Heuglin, 1863) Holotype. SMNS 1055; a specimen collected by Heuglin in 1863 and sent to the Stuttgarter Naturalienkahiuett (now SMNS) where it was registered under no. 1055 in the (Accession-) Catalogue for mammals, foun


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