河南鲤科鱼类咽骨咽齿的比较研究(三)

<正> 本文记述了鳑鲏亚科Acheilognathinae鱼类3属6种,现分述如下:鳑鲏亚科:咽齿一列,齿式0·0·5/5·0·0,齿侧扁,两侧对称,咽齿背侧面光滑或具锯齿,先端钩状,咀嚼面狭长,形状各异,微凸、微凹或略平。前角向外突出,后角不明显。鳑鲏亚科各属种检索表A_1咽齿侧面无锯齿B_1前无齿突凹窝面宽约为其突宽的1/2。

THE COMP ARATIVE STUDIES OF THE PHARYNGEAL BONES AND THEIR TEETH OF ACHEILOGNATHINAE

The characteristic of pharyngeal bones and their teeth in trree genera and six species of Acheilognathinae fishes are described in this paper. The characteristics of the Achei lognathinae are summarized as follows: Teeth are only one-rowed, 0.0.5/5.0.0 in dental formula, moderatly compressed, laterally symmetrical, with well deve loped long and narrow grinding surface Their tips are usus lly recurved and more or less expanded The sides of the teeth are smooth or serrations. pharyngeal bones are always with pro-minent anterior angle but indistinct posterior one. Key to the Genera and Species A. The side of pharyngeal teeth without serrations B.The breadth of pitted surface of anterior edentu lose process about 1/2 in breadth of the process, length of bones 4.6…5.8 in height…… ……Rhodeus sinensis Gunther BB.The breadth of pitted surface of anterior edentu lose process over 1/2 in breadth of the process, length of bone 5.1…7.7 in height…… ……Rhodeus ocellatus (kner) AA. The side of part pharyngeal teeth with weak ly serrations, dentigerous surface longer than the anterior edentulose process, the length of dentigerous surface about equal in posterior edentalose process……pseudoperilampus lighti wu AAA. The side of pharyngeal teeth with deeply serrations C.The grinding surface long and narrow with deeoly groove in the center, laterally symmetrical……Acanthorhodeus chankaensisCDyb. ) CC.The grinding surface long and narrow variant in form, laterally asymmetrical D.with a process of awl in the middle ventral of posterior edentulose process, the 2nd-5th teeth with strongly recurved…… ……Acanthorhodeus taenianalis Gunther DD.With a process of trapeze in the middle ventral of posterior edentulose process, the 3rd-5th with strongly recurved…… ……Acanthorhodeus macropterus Bleeker