期刊
ALCHERINGA
卷 45, 期 4, 页码 385-394出版社
TAYLOR & FRANCIS LTD
DOI: 10.1080/03115518.2021.2004225
关键词
Hyolitha; Orthothecida; operculum; Cambrian; Miaolingian (Wulivan); North Greenland; Laurentia
类别
Protowenella is an early-middle Cambrian calcareous microfossil with a novel morphology, transferred from Mollusca to Hyolitha, representing a departure from the generally slender cones of other hyoliths.
Protowenella is an early-middle Cambrian, isostrophically coiled, calcareous microfossil originally described from the middle Cambrian (Miaolingian) of Australia; it has been referred previously to the molluscan classes Monoplacophora, Helcionelloida or Gastropoda. A unique specimen from the Henson Gletscher Formation (Miaolingian Series, Wuliuan Stage) of North Greenland has a bilaterally symmetrical operculum preserved in place within the shell aperture. Paired cardinal processes and clavicles on the inner side of the operculum indicate that Protowenella was a hyolith morphologically close to the orthothecid Conotheca. Protowenella is transferred from Mollusca to Hyolitha, Order Orthothecida, Family Protowenellidae nov., representing a novel morphological departure from the generally slender cones of other hyoliths.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据