| 石红艳,刘昊,吴毅,胡锦矗.2010.中华山蝠牙齿的脱换模式.动物学杂志,45(1):125-129. |
| 中华山蝠牙齿的脱换模式 |
| Tooth Replacement Pattern in Nyctalus velutinus |
| 投稿时间：2009-07-02 修订日期：2009-11-15 |
| DOI： |
| 中文关键词: 中华山蝠 翼手类(蝙蝠) 牙齿脱换 |
| 英文关键词:Nyctalus velutinus Chiroptera(Bats) Tooth replacement |
| 基金项目:国家自然科学基金项目子课题(No.30499341);四川省教育厅青年基金项目(No.2006B083);绵阳师范学院重点项目(No.MA2005009) |
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| 中文摘要: |
| 笔者于1997年对中华山蝠(Nyctalus velutinus)牙齿的脱换模式进行了研究。共观察幼蝠200只次。中华山蝠初生仔共有22枚乳齿,齿式为2.1.2.0/3.1.2.0,各乳齿略向舌侧倾斜,除乳前臼齿齿冠不分叉外,其余乳齿齿冠均分为三叶。4d龄开始换齿,31d龄左右脱换完毕。乳齿的脱落顺序是:上颌,PM2→PM1→C1→I1→I2;下颌,I1→PM2.I2→I3→PM1→C1;恒齿萌生的顺序为:上颌,M1→PM2.C1→M2→PM1.M3→I1→I2,下颌,M1→I1.PM2→I2.M2→I3.PM1→C1→M3。 |
| 英文摘要: |
| Tooth replacement pattern was observed in Villus Noctule Bat (Nyctalus velutinus) in 1997 and 200 specimens had been involved in this study. The dental formula of milk teeth was I 2/3,C1/1,PM2/2,M0/0=22.The first decay and eruption of tooth took place in 4 days and 14 days after birth,respectively. The termination of decay and eruption was in 31 days after birth. The sequence of decay of the milk teeth were PM2,PM1,C1,I1,I2 in upper jaw and I1,PM2 or I2,I3 ,PM1,C1 in lower jaw. The eruptional sequence of the permanent teeth were M1,PM2,or C1,M2,PM1 or M3,I1,I2 in upper jaw and M1,I1 or PM2 ,I2 or M2,I3 or PM1,C1,M3 in lower jaw. |
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