An Early Triassic conodont with periodic growth?
Open Access
- 1 May 1997
- journal article
- Published by Copernicus GmbH in Journal of Micropalaeontology
- Vol. 16 (1) , 65-72
- https://doi.org/10.1144/jm.16.1.65
Abstract
Elements of a new Triassic conodont genus Parapachycladina, from the Lower Triassic Beisi Formation of western Guangxi Province, China, show a characteristic pattern of lamellar edges in the recessive basal margin. The lamellae are grouped in sets of 8–10, with broad interlamellar spaces between each set. If this apparent periodicity reflects annual cycles, the specimens were not more than four years old when they ceased growing.Keywords
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