Journal
ALCHERINGA
Volume 38, Issue 1, Pages 148-153Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1080/03115518.2014.843381
Keywords
Hyolitha; Orthothecida; shell articulation; early Cambrian
Categories
Funding
- Australian Research Council [129104251]
- Swedish Museum of Natural History
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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fossils lack evidence of helens, and the operculum was smaller than the apertural diameter of the conch and could be withdrawn a short distance into the conch.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???????????????
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