対馬・佐護および美津島群コキクガシラコウモリRhinolophus cornutusにおける飛膜付着部位の変異について

概要

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The samples of populations of Rhinolophus cornutus cornutus (TEMMINCK, 1800) from the Tsushima Is., Japan, one Sago population from Kamiagata-machi, Kamiagata-gun, and the other Mitoshima population from Mitoshima-machi, Shimo-agata-gun, were selected to analyse the variation of inserted position of wing-membrane to hind leg. The Sago population was represented by 41 males and 24 females, Mitoshima population by 65 females. Distance between inserted position and ankle joint was measured and expressed by positive number when the former was terminal to the joint and by negative number when it was proximal. Then the distances were statistically analysed by distance index adding 10 mm to each of them. No differences are observed in the means of the distances between different relative age classes, those of left and right sides, or males and females in the same population. However, the means of the Sago and Mitoshima populations are probably different in 99 per cent of confidence. The means are in level of 0.91 mm proximal to ankle joint in the Sago population and in 0.06 mm proximal to that in the Mitoshima population. Although the coefficient of difference between the means of these populations are much lower than the conventional level of subspecific differences proposed by MAYR etc., the inserted position of wing membrane may be useful to analyse taxonomically small populations of this species.
日本哺乳類学会の論文