Journal
BULLETIN OF GEOSCIENCES
Volume 94, Issue 1, Pages 115-124Publisher
CZECH GEOLOGICAL SURVEY
DOI: 10.3140/bull.geosci.1730
Keywords
Edrioasteroid; Cambrian; Spence Shale; Idaho; Cambrian Substrate Revolution
Categories
Funding
- National Sciences Foundation of China [40672005, 41172005, 41222013]
- Major State Basic Research Development Programme of China (973 Programme) [2013CB835002, 2015FY310100-5]
- Guizhou Science and Technology Department of China Guizhou Research Center for Palaeontology [Guizhou Science] [(2014) 4003]
- Guizhou Science and Technology Department of China Guizhou Research Center for Palaeontology [Guizhou Science Research Center] [(2017) 5788]
- China Geological Survey [DD20160120-04]
- Guizhou Science and Research of Postgraduate of Guizhou Science and Technology Department, China [KYJJ2017003]
- Subsurface Energy Research Center of The Ohio State University
- Construction Project of the Post-graduate Research Fund of Guizhou Province [KYJJ2017003]
- China Scholarship Council [201708520109]
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A new species of Totiglobus, T. spencensis (class Edrioasteroidea, order Edrioasterida), is reported from the Spence Shale (Cambrian: Miaolingian Series, Wuliuan Stage) of eastern Idaho. The holotype, which was evidently buried at the base of a tempestite bed, is attached by a basal disk to a hyolithid conch. In contrast to the closely related species T. nimius, which attached to mat-stabilized sediment by means of a suction disk on the aboral surface, T. spencensis attached to hard substrates by means of an attachment disk on the aboral surface. Edrioasteroids first evolved mechanisms for attaching to hard substrates in the Wuliuan Age, and T. spencensis is thus among the earliest-known edrioasteroids to show this habit. By the Drumian Age, attachment to hard substrates had become the dominant post-larval life habit of edrioasteroids.
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