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描述了产于黔东南剑河县中寒武统凯里组中上部的19块中寒武统底部标志化石——印度掘头虫Oryctocephalus indicus(Reed,1910)蜕壳标本,其中大部分缺失头盖,其余外壳保存完好.对其蜕壳过程进行了探讨,认为蜕壳程序如下:头甲以小于90°角下弯,导致背壳沿头、胸接合处裂开;面线张开,自由颊与头盖裂开;虫体恢复平伸状态,头盖旋转;三叶虫携老壳向前爬行,并将已与自由颊和胸甲裂开的头盖顶翻于头甲前方;虫体继续向前爬行,并将头盖扒向两侧;虫体向前爬行并不断颤动,最终脱掉老壳.被脱掉的老壳胸尾相连,腹边缘-唇瓣板与自由颊基本位于原位,与“Phacopid式蜕壳”或“Salter式埋藏”明显不同.
The 19 epoch-making fossils of Oryctocephalus indicus (Reed, 1910) from the middle Cambrian of the Middle Cambrian Kaili Formation in Jianhe County, southeastern Guizhou were described. Most of them were missing cap, The rest of the shell is well preserved. The process of its molting is discussed. The procedure of molting is as follows: the trochanter is bent at an angle of less than 90 °, causing the shell of the scapula to rupture along the head and chest joints; Head cover cracked; parasites flat recovery state, head rotation; trilobites crawl forward with the old shell, and has been with the free cheeks and breastplate split the head cover the top in front of the headdress; parasites continue Crawling forward, and the head cover to both sides; parasites crawling forward and continue to vibrate, and finally take off the old shell .Take off the old shell chest and tail connected, abdominal edge - lip flap and cheek basically located in the original Bit, which is significantly different from “Phacopid molt” or “Salter burial”.