小翼手類における歯数異常

概要

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The examined materials comprise 9 species, 179 individuals of the suborder Microchiroptera collected in Nagano Pref., central Japan. 1) . Rhinolophus cornutus. A total 34 specimens was examined without finding any instance of variation. 2) . Rhinolophus ferrumequinum. In this species 13 variants were found in 54 specimens. They have one or more P 3 missing. A record of the missing teeth may be summarized as follows: L (left) P3, L and R (right) P3, catalogue number 1; LP3, no. 2; RP3, no. 3; L & RP3 and RP3, no. 4; L & RP3, nos. 5 & 6; LP3, no. 7; RP3, no. 8; L & RP3, no. 9; RP3, no. 10; LP3, no. 11; LP3 and LP3, no. 12; L & RP3, no. 13. 3) . Myotis nattereri. No variations were found in 2 specimens. 4) . Myotis macrodactylus. 3 variants were found in 27 specimens. They have one or two upper 3rd premolar missing. Missing teeth : L & RP3, no. 1; RP3, no. 2; LP3, no. 3. 5) . Nyctalus lasiopterus. 2 variants were found in 8 specimens. One lacks L & RP3, and the other lacks RP3. 6) . Pipistrellus abrarnus. One has an extra incisor tooth in 14 specimens examined. There were no instance of variation of P 3. 7) . No variations were found in Plecotus auritus, 3 specimens; Miniopterus schreihersi, 33 specimens; Murina leucogaster, 4 specimens.
日本哺乳類学会の論文