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The Feeding Mechanisms of Spire-Bearing Fossil Brachiopods

Published online by Cambridge University Press:  01 May 2009

M. J. S. Rudwick
M. J. S. Rudwick
Affiliation:
Sedgwick Museum, Cambridge.
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Abstract

The lophophores of spire-bearing fossil brachiopods (Spiriferoidea and Atrypoidea) arereconstructed by homological comparison with living brachiopods. It is inferred that all spiral brachidia supported simple spiral lophophores. For each type of brachidium, only one arrangement of the spirolophe could have created an efficient filter-feeding system. The water would have entered the mantle cavity laterally and been ejected medially; but would have been filtered between the whorls of the conical spiralia either outwards (e.g. Atrypa) or inwards (e.g. Spirifer). These are the only possible alternatives: it is probable that both systems were evolved more than once.

Type
Articles
Information
Geological Magazine , Volume 97 , Issue 5 , October 1960 , pp. 369 - 383
Copyright
Copyright © Cambridge University Press 1960

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References

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