北海道にて採集された稀種オヒキコウモリ及びトウキヨウトガリネズミについて

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1) Tadarida teniotis insignis Blyth In November 1957 one free tailed bat ( _??_adult) was obtained by Mr, Torao Kumada in Yagishiri Is. off Haboro, Prov. Rumoi, Hokkaido. This is a new record to Hokkaido and the second record to Japan; the first one recorded from Fukuoka Pref. in 1944. Description : - Color, above nearly chaetura drab and slightly lighter under (between hair brown and chaetura drab of Ridgway), the hairs whitish at the base, the tip frosted with light drab; the hairs of throat uniformly colored to the tips. Wing blackish brown; ear and projecting part of tail black. Fur soft, fine and dense. The dense and long fur of body sides extends on to the membrane between knee and upper arm; the width of the fur on the membrane is broader on the side of belly (about 1 cm.) than back. Borders of feet with a fringe of projecting hairs, which are longer than claws, at the upper tip of digits and at the outer base of fifth, and which are shorter on the rest. Wing very long and narrow, length of third finger abaut two times longer than sub-equal second and fifth. Tail with its terminal half projecting. Ear large and round, and with their anterior basis meeting in the middle of the forehead by a wide inward extention which is covered with relatively long hairs. The back of ear with a narrow hairy belt forming a middle line from base toward the tip. The tip of ear with some four dermal processes in raw material. Lip large, with several vertical grooves between the angle of the mouth and the nostrils. Skull very similar to that of the typical teniotis of Europe in size and figure, but this specimen with a slightly smaller proportions of zygomatic breadth and lachrymal breadth to the greatest length of skull than in typical subspecies. Reveresely the mandible and its tooth row relatively long. Measurements : Total length 143, tail 51, fore arm 63, second finger 58, third f. 113, fourth f. 85.5, fifth f. 58, hind foot (s.u.) 11.3, tibia 20, ear 26.5×20, tragus 5.8. Skull greatest length 24.4, condylobasal length 23.5, basilar length 20, palatilar length 8.2, mastoid breadth 12.9, lachrymal breadth 7.5, zygomatic breadth 13.6, interorbital constriction 5.0, rostrum 6.0, depth of braincase at middle 6.3, breadth of braincase 11.6, upper tooth row 10, width across molars 9.3, mandible 17.7, lower tooth row 10.9. 1 Sorex minutissimus hawkeri Thomas Type specimen ( _??_) which was described by Thomas had been obtained by Hawker at Inukawa, Yedo (Tokyo), Hondo. But nowhere is this local name near Tokyo and having no specimens been obtained after that then we have confused. On August 23-25, 1957, the author fortunately could obtain 9 specimens ( _??_4, _??_5, all relatively young) of this rare species in the larchplanted land at Ni jibetsu, Prov. Nemuro, Hokkaido. Description : - Color, summer pelage, back near clove drown, side slightiy paler than back, underpart silverly pale drab-gray. Tail bicolored and concolored with back above, pale drab or whitish under. Head and body very small, with relatively short tail and small feet. Tail with relatively long hairs nearly concealing the annulations; its pencil about 5-6 mm. Skull. General characters similar to those of the other species of Sorex except for its extremely small size. Width across molors very large, but rostrum short relatively. The proportions of upper unicuspid row and lower tooth row to the greatest length of skull are extremely smaller respectively than in other species in Hokkaido. Crowns of upper unicuspids crealy shorter than broad and strongly crowded, so that the unicuspid row distinctly shorter than the combined length of first and second upper molars, and about as long as the width of rostrum across last unicuspid. The relative size among unicuspids similar to that of large S. unguiculatus. First decidedly larger than subequal second and third, which in turn exeed fourth.
日本哺乳類学会の論文

著者

阿部永
北大農

北海道にて採集された稀種オヒキコウモリ及びトウキヨウトガリネズミについて

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