摘要
首次描述了贵州西南部中三叠统koninckinids(康尼克贝类)3属6种,根据腕螺的支持构造类型将背内腕螺初带横伸,由腕锁,腕棒支持,与主基连接的类群归Koninckinidae;将腕螺初带横伸,缺失腕锁,螺带主层直接与铰板连接,螺带主层与副层分离,形成双重腕螺的贝体,且与Koninc-kinidae的腕螺支持类型明显不同的,建立新亚科Amphiclininae subfamily nov..腕螺初带向主突起基斜伸,与主突起基部延长部分连接,支持腕螺的类群,暂归扭月贝目根据贝体特征,认为背内具粗大圆锥状腕螺的Koninckina 其腕螺除诱导捕食功能外,可能还有制导贝体着底方向的作用.并对koninckinids产出层位和时代进行了对比和讨论.
The koninckinids mentioned herein were found and collected from the Falang Formation (Ladinian) at Duanqiao of Guanling, Sanhe, Longchang of Zhenfeng, and Sanqiao Formation (Carnian) at Nidang of Xingyi, SW Guizhou by members of our team in 1978 and 1979 respectively while surveying the Triassic system section.
This paper described three genera. six species, and two indeterminable species, with six species considered as new. Based on the attachment form of spiralia in dorsal interior of these koninckinids and figures shown by Beecher (1890), Boucot et al. (1965), Muir-Wood and Williams (1965) We proposed the classification of genus and subfamily as follows: (1) Those forms with primary branches of spiralia transversely extending, spiralia supported by crura,
出处
《古生物学报》
CAS
CSCD
北大核心
1993年第2期232-249,285-287,共18页
Acta Palaeontologica Sinica
关键词
康尼克贝类
中三叠世
腕足动物
Middle Triassic
koninckinid classification
SW Guizhou
