The structure of the stomatogastric neuromuscular system in Callinectes sapidus, Homarus americanus and Panulirus argus (Decapoda Crustacea).

摘要: The stomatogastric nervous system of the reptantian Decapoda Crustacea, particularly small isolated ganglion containing 25-30 motor neurons that control muscles gastric mill and pyloric filter stomach, is an important preparation for research in comparative neurophysiology. Unfortunately there are no comprehensive descriptions neuromuscular stomach these animals. Therefore, since identified by reference to they innervate, it has been difficult identify within or between species. most features classifying decapod ossicles which attach. In latter part last century Mocquard demonstrated decapods could be compared different groups despite large variations from group group. A summary Mocquard’s (1883) classification scheme, with some modifications, given. scheme recognizes 33 seven categories (cardiac mill, I—VII; lateral supporting cardiac ossicles, VIII-XV ; cardio-pyloric valve, XVI-XVIII; dorsal XIX -XXI; ventral pylorus ampullae, XXII-XXVII; supra-ampullary XXVIII-XXX pylorus, XXXI-XXXIII). Where necessary, comments then made on three divergent species studied, blue crab, Callinectes sapidus (Brachyura); lobster, Homarus americanus (Macrura) spiny lobster Panulirus argus (Palinura). Most thirty-three found each species, but major differences , example, complex ossicle reduced.