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

Christian B. Skovsted, Timothy P. Topper, Marissa J. Betts, Glenn A. Brock

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

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fossils lack evidence of helens, and the operculum was smaller than the apertural diameter of the conch and could be withdrawn a short distance into the conch.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

Original languageEnglish
Pages (from-to)148-153
Number of pages6
JournalAlcheringa
Volume38
Issue number1
DOIs
Publication statusPublished - 2014

Keywords

  • Hyolitha
  • Orthothecida
  • early Cambrian
  • shell articulation

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