The relationship between major lamellae and epithelial regressions in some articulate brachiopods |
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| Authors: | C. HOWARD C. BRUNTON FERNANDO ALVAREZ |
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| Affiliation: | Department of Palaeontology, British Museum (Natural History), Cromwell Road, London SW7 SBD, England;Departamento de Geologia, Universidad de Oviedo, Oviedo, Spain;15th September, 1988 |
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| Abstract: | Brunton, C. Howard C. & Alvarez, Fernando 1989 07 15: The relationship between major lamellae and epithelial regressions in some articulate brachiopods. Lethaia , Vol. 22, pp. 247–250. Oslo. ISSN 0024–1164.
Hiller (1988, Lethaia , Vol. 212) proposed three relationships between the secretory epithelium of articulate brachiopods and the shell surface ornamentations of growth lines, lamellae and spines. None of his models satisfy the growth of strongly lamellose athyrid shells and we propose a fourth involving strong regressions effecting both primary and secondary shell layers. In Recent Tegulorhynchia we suggest a growth function for the 'frayed' shell of Hiller occurring immediately in front of the spines. |
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