Dentigerous bones and dentition in the hemiramphid fish Dermogenys pusillus (Atheriniformes, Teleostei)
Dentigerous bones and dentition in the hemiramphid fish Dermogenys pusillus (Atheriniformes, Teleostei)
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DOI：
10.1016/s0940-9602(97)80129-x
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发表时间：
1997-02-01
影响因子：
2.2
通讯作者：
Clemen, G
中科院分区：
文献类型：
--
作者：
Greven, H;Wanninger, AC;Clemen, G
利用扫描电子显微镜以及透明和染色的标本，研究了半翼目Dermogenys pusillus牙齿的结构和排列。颚的牙齿很小，单尖牙，并向食道倾斜。它们沿着前颌骨和牙齿的侧边缘排列。每一个前颌骨承担额外的牙齿上的骨杆延伸从嘴侧到中间舌。两颗牙齿的齿列在口腔内略微弯曲，并在上颌尖端之外逐渐变细。下颌的一部分通常突出上颌，没有牙齿。一个背侧和两个侧齿轴承骨板（齿板）被发现在咽部区域。它们的牙齿排列很不规则。两侧齿板上的齿较小且为单尖齿，而背侧齿板和腹侧齿板则具有额外的双尖齿和三尖齿。颌骨和咽部的牙齿明显有一个骨蒂（“附着骨”），在所有牙齿中都是不对称的。弹性缝线连接牙本质圆锥体和骨蒂。牙齿的特殊构造和它们在各种含牙骨上的排列方式将根据它们在捕捉猎物方面的功能进行讨论。
Structure and arrangement of the teeth were studied in the hemiramphid Dermogenys pusillus, using scanning electron microscopy as well as cleared and stained specimens. The teeth of the jaws are small, monocuspid, and tilted towards the esophagus. They are arranged along the lateral edges of the premaxillas and dentaries. Each premaxilla bears additional teeth on an osseous bar extending from rostro-lateral to medio-lingual. The dentition of both dentaries curves slightly within the cavity of the mouth and gently tapers off laterorostrad just beyond the tip of the upper jaw The part of the lower jaw which typically protrudes beyond the upper jaw, is without teeth. One dorsal and two lateral tooth-bearing bony plates (tooth plates) are found in the pharyngeal region. Their teeth are largely irregular in arrangement. The teeth on the two lateral plates are small and monocuspid, whereas the dorsal and the ventral tooth plate possess additional strong bi- and tricuspid teeth. The teeth of the jaws and of the pharyngeal region obviously have a bony pedicel (''attachment bone'') which is asymmetric in all teeth. An elastic suture connects the cone of dentine with the bony pedicel. The special construction of the teeth and their arrangement on the various dentigerous bones will be discussed with respect to their function in catching prey.