小地老虎成虫循环系统形态的初步研究

本文对小地老虎Agrotis ypsilon 成虫循环系统的形态作了初步研究,表明背血管由6个心室的心脏和倒V形的胸部大血管及头部分支的大血管组成.中胸辅搏动器很发达,与大血管的腔直接相连,具有一个小盾片腔前半部的肌肉搏动膜.后胸辅搏动器很小,与背血管无直接通道,具有一个没有肌肉的搏动膜.腹膈显著,具有翼肌.还描述了心脏和辅搏动器的搏动情形.

A STUDY ON THE MORPHOLOGY OF CIRCULATORY SYSTEM OF ADULT AGROTIS YPSILON

A preliminary study has been made on the morphology of the circulatory system of the Agrotis ypsilon moth., The system consists the dorsal vessel with the six-chambered heart in the abdominal region and the reversely v-shaped aorta,which extends anteriorly into the cephalic .arteries. The mesothoracic accessory pulsatory organ is well developed and directly .connects with a special diverticulum of the aorta. There is a muscular membrane which stretches across the anterior half of the coelomic cavity beneath the scutellum. The metathoracic accessory pulsatory organ is very small and has no direct channels connecting the dorsal vessel, but there is a pulsating membrane without muscle. The ventral diaphragm is very conspicuous, but has no alary muscles. The pulsatory movements of the heart and the accessory plusating organs are described.