MOLLUSCAN MARGINALIA : HIDDEN MORPHOLOGICAL DIVERSITY AT THE BIVALVE SHELL EDGE GEERAT

@inproceedings{Vermeij2013MOLLUSCANM,
  title={MOLLUSCAN MARGINALIA : HIDDEN MORPHOLOGICAL DIVERSITY AT THE BIVALVE SHELL EDGE GEERAT},
  author={Jan-Dirk Vermeij},
  year={2013}
}
Molluscan shells exhibit a high and largely neglected diversity of serrations and crenulations at the growing margin. A survey of living and Cenozoic fossil bivalves indicates that serrations, in which the external ribs or interspaces between ribs extend radially beyond the general contour of the valve margin, may be symmetrical or asymmetrical. Projections whose adumbonal edge more nearly parallels the shell edge than the abumbonal edge occur on the posterior valve margins of many limids… CONTINUE READING

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