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Associated conchs and opercula of Triplicatella disdoma (Hyolitha) from the early Cambrian of South Australia
Swedish Museum of Natural History, Department of Paleobiology.ORCID iD: 0000-0001-7366-7680
Uppsala University.
Macquarie university.
Macquarie University.
2013 (English)In: Alcheringa, ISSN 0311-5518, Vol. 38, no 1, 148-153 p.Article in journal (Refereed) Published
Abstract [en]

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fossils lack evidence of helens, and the operculum was smaller than the apertural diameter of the conch and could be withdrawn a short distance into the conch.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.

Place, publisher, year, edition, pages
2013. Vol. 38, no 1, 148-153 p.
Keyword [en]
Hyolitha, Orthothecida, shell articulation, early Cambrian
National Category
Research subject
The changing Earth; Ecosystems and species history
URN: urn:nbn:se:nrm:diva-871DOI: 10.1080/03115518.2014.843381OAI: diva2:764660
Origin and early evolution of major animal clades in the Cambrian Period
Available from: 2014-11-20 Created: 2014-11-20 Last updated: 2014-11-20Bibliographically approved

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