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Shell development, growth and sexual dimorphism in the Recent thecideide brachiopod Thecidellina meyeri sp. nov. from the Lesser Antilles, Caribbean

Published online by Cambridge University Press:  09 April 2009

Jana Hoffmann  and
Carsten Lüter
Jana Hoffmann*
Affiliation:
Museum für Naturkunde der Humboldt-Universität zu Berlin, Invalidenstrasse 43, 10115 Berlin, Germany
Carsten Lüter
Affiliation:
Museum für Naturkunde der Humboldt-Universität zu Berlin, Invalidenstrasse 43, 10115 Berlin, Germany
*
Correspondence should be addressed to: Jana Hoffmann, Museum für Naturkunde der Humboldt-Universität zu Berlin, Invalidenstrasse 43, 10115 Berlin, Germany email: jana.hoffmann@museum.hu-berlin.de
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Abstract

A new thecideide brachiopod species, Thecidellina meyeri, is described from the southern Lesser Antilles (Aruba, Bonaire, Curaçao), Caribbean Sea, with unique morphological characters which clearly separate it from all other described species of Thecidellina in the region. A virtually complete series of ontogenetic stages is recorded, providing insight into the plasticity of shell development during growth in thecideide brachiopods and offering a well-defined standard for comparison with fossil material. Study of the soft tissue suggests that T. meyeri is dioecious, which contradicts the idea of Thecidellina to be hermaphroditic. The limited distribution and the unexpectedly high species diversity within the genus Thecidellina in the Caribbean region support the idea of allopatric speciation due to limited dispersal ability.

Keywords

shell developmentgrowthsexual dimorphismThecidellina meyeri sp. nov.Lesser AntillesCaribbean Sea
Type
Research Article
Information
Journal of the Marine Biological Association of the United Kingdom , Volume 89 , Issue 3 , May 2009 , pp. 469 - 479
Copyright
Copyright © Marine Biological Association of the United Kingdom 2009

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