鲤形目鱼类咽齿形态及发育的比较研究

对鲤形目所属６科类的咽龄形态及个体发育模型进行了较详细的比较研究。结果得出除双孔鱼科鱼类未形成咽齿外，其它５科鱼类在咽齿发生的过程中具有齿着生方向完全相反的两种发育模式。以亚口鱼科，鳅科和平鳍鳅为一类的齿后向增长的类型和以鲤科另一类的齿同增长的类型。

COMPARATIVE STUDY ON THE MORPHOLOGY AND DEVELOPMENT OF THE PHARYNGEAL DENTITION IN THE FAMILIES OF CYPRINIFORMES

The morphology and development of pharyngeal dentition were observed for Myxocyprinus asiaticus, Gobiocypris rarus, Psilorhynchus homaloptere, Gyrinocheilus aymonieri, Leptarichthys fimbriata and Cobitis sp. which represent families of Catostomidae, Cyprinidae, Psilorhynchidae, Gyrinocheilidae, Homalopteridae and Cobitidae. Results indicate that, in the Cypriniformes, except Gyrinocheilidae which does not bear pharyngeal teeth, the development process of pharyngeal dentition can be divided into 2 patterns, one of them occurs in Families Catostomidae, Homalopteridae and Cobitidae and the other only restricted to family Cyprinidae. The first pattern has such a process: before the tooth position Ce0, there is only one tooth position appearing at An1, all the other tooth positions are distributed to the positions after the Ce0, from Po1 to Pon. The number of the tooth, positions are not limited. The teeth can be distributed to the end of the pharyngeal bones. In the second pattern, after the tooth position Ce0, there is only one tooth position Po1. All the other tooth positions are distributed before the Ce0, and the numbers of the tooth positions are limited to 7.