ASYMMETRY IN THECIDELLINA (BRACHIOPODA) FROM THE PLIOCENE-PLEISTOCENE OF CURAÇAO, NETHERLANDS ANTILLES: PHENOTYPIC NOT GENOTYPIC
DOI:
https://doi.org/10.54103/2039-4942/22870Keywords:
Rhynchonelliformea; Thecidellina; morphometrics; asymmetry; palaeoecology; Cenozoic; Curaçao.Abstract
Shape analysis of a large sample of the thecideid brachiopod Thecidellina from the Pliocene and Pleistocene rocks on the Caribbean island of Curaçao highlights asymmetry within the population. However, the 30 analysed specimens display a lack of a consistent asymmetry. The brachiopods were cemented to substrates by a cicatrix, accommodated by a change in shell structure. The plastic morphology of Thecidellina may have been due to overcrowding and competition for resources on limited substrates.
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Copyright (c) 2024 DAVID A.T. HARPER, MABEL LA TURNER, STEPHEN K. DONOVAN, ROGER W. PORTELL
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Accepted 2024-07-17
Published 2024-09-09
