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. Bonn zoological bulletin. Zoology. Fig. 6. Trioceros sternfeldi (male) Mt. Kilimanjaro. of legs, soles and underside of the tail almost homogene- ously scaled. No tarsal spurs. Hemipenis. Smooth margined calyces cover the asulcal side of the hemipenis, extending as far as the sulcal lips. Apical tip characterised by two pairs of finely serrate ro- tulae of roughly semicircular shape, positioned towards the sulcal side and extending around lateral side of hemipenis. Scattered melanophores could be observed in the sulcus (Figure 2). Colouration and pattern. Vivid green with lateral yel- low ba
. Bonn zoological bulletin. Zoology. Fig. 6. Trioceros sternfeldi (male) Mt. Kilimanjaro. of legs, soles and underside of the tail almost homogene- ously scaled. No tarsal spurs. Hemipenis. Smooth margined calyces cover the asulcal side of the hemipenis, extending as far as the sulcal lips. Apical tip characterised by two pairs of finely serrate ro- tulae of roughly semicircular shape, positioned towards the sulcal side and extending around lateral side of hemipenis. Scattered melanophores could be observed in the sulcus (Figure 2). Colouration and pattern. Vivid green with lateral yel- low bar following the row of enlarged scales running from neck to the base of tail. Head light blue except gular re- gion. Eyeballs bright blue to turquoise. Variation of the paratypes. Analysis of morphometric variation between male and female specimens of Trioceros n. sp. from Mt. Hanang resulted in males having signifi- cantly broader heads than females ( x = 13,09 mm vs. x = 12,59 mm; p = 0,030) and a tendency to increased ru- gosity in adult males. There is no apparent statistical dif- ference in snout-vent-length (SVL) comparing both sex-. Fig. 7. Mt. Hanang from Katesh, SSW side of the mountain. Bonn zoological Bulletin 57 (1): 19-29 es. (males: SVL = 72,30 mm, N = 9 / females: SVL = 75,52 mm, N = 14). No significant differences in relative tail length (TL) between sexes could be observed (males: TL = 66,22 mm / females: TL = 62,71 mm). Distribution. Only known from Mt. Hanang Catchment Forest Reserve (4° 25' to 4° 35' S and 35° 20' to 35° 25' E) situated about 4 km from the district capital Katesh and 70 km from the town Babati in the administrative region of Arusha. The new species is named after the type-local- ity Mount Hanang. Ecological remarks and habitat preference.: T. hanan- gensis n. sp. was found in upland moorland at 2800 m on the moister north-eastern side of Mt. Hanang. Despite a prevaling semi-arid climate with 750-1500 mm annual rainfall, a pronounced mist
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