Associated conchs and opercula of Triplicatella disdoma (Hyolitha) from the early Cambrian of South Australia

被引：20

作者：

Skovsted, Christian B. ^{[1
]}

Topper, Timothy P. ^{[2
]}

Betts, Marissa J. ^{[3
]}

Brock, Glenn A. ^{[3
]}

机构：

[1] Swedish Museum Nat Hist, Dept Palaeobiol, SE-10405 Stockholm, Sweden

[2] Uppsala Univ, Dept Earth Sci, SE-75236 Uppsala, Sweden

[3] Macquarie Univ, Dept Biol Sci, Sydney, NSW 2109, Australia

来源：

ALCHERINGA | 2014年 / 38卷 / 01期

基金：

澳大利亚研究理事会;

关键词：

Hyolitha; Orthothecida; shell articulation; early Cambrian; BIOSTRATIGRAPHY; SYSTEMATICS; GREENLAND;

D O I：

10.1080/03115518.2014.843381

中图分类号：

Q91 [古生物学];

学科分类号：

0709 ; 070903 ;

摘要：

Internal moulds of complete shells, including conch and associated opercula, of the hyolith Triplicatella disdoma from Cambrian Series 2, Stages 3-4 of South Australia are described. The conch of T. disdoma is shown to be narrow and cone-shaped, and with a rounded triangular cross-section. The conch shows a gentle dorsal curvature in lateral view. The fossils lack evidence of helens, and the operculum was smaller than the apertural diameter of the conch and could be withdrawn a short distance into the conch. Triplicatella was probably closely related to orthothecid hyoliths. ???????????2????Triplicatella disdoma ????????, ??????????T. disdoma?????????, ??????????????????????????????????, ????????????, ????????????Triplicatella???????????????

引用

页码：148 / 153

页数：6

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