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Growth patterns of noetiid ligaments: implications of developmental models for the origin of an evolutionary novelty among arcoid bivalves,

Abstract:

The dorsal ligaments of arcoid bivalves typically consist of oblique, lamellar and fibrous sheets, alternating along the hinge so that their attachments form characteristic chevron patterns. New elements are added at or near the middle of the pattern, as the ligamnet grows ventrally and gets longer. Most Palaeozoic arcoids exhibit this growth pattern, which still predominates among their living descendents. Early in the Cretaceous, a novel pattern emerged, with vertical strips of lamellar ...

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Publication date:
2000-01-01
URN:
uuid:bb8b406e-0fbd-494f-9c41-567b3944467c
Local pid:
oai:eprints.maths.ox.ac.uk:416

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