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dc.contributor.authorPlotnick, Roy
dc.contributor.authorDattilo, Benjamin
dc.contributor.authorPiquard, Daniel
dc.contributor.authorBauer, Jennifer
dc.contributor.authorCorrie, Joshua
dc.date.accessioned2013-09-09T16:19:08Z
dc.date.available2013-09-09T16:19:08Z
dc.date.issued2013-11-01
dc.identifier.bibliographicCitationPlotnick, R. Dattilo, B. Piquard, D. Bauer, J. Corrie, J. The Orientation Of Strophomenid Brachiopods On Soft Substrates. Journal of Paleontology, 87(5), 2013, p. 818–825en_US
dc.identifier.issn0022-3360/13/0087-818$03.00
dc.identifier.otherDOI: 10.1666/12-152
dc.identifier.urihttp://hdl.handle.net/10027/10084
dc.description.abstractStrophomenid brachiopods have long been interpreted as ‘‘snowshoe’’ strategists, with their flattened concavoconvex valves providing resistance to foundering in very soft sediments. There has been a sharp difference of opinion in whether the shells were oriented with their convex or their concave surface in contact with the sediment. This study, along with independent evidence from sedimentology, ichnology, and morphology, indicates that the strophomenids lived with their shells concave down (convex up). Experiments indicate the force required to push shells into soft cohesive muds is much greater for the convex up than for the convex down orientation. Forces also increase with shell curvature. All measured forces greatly exceed estimates of the downward force exerted by the weight of the shell, indicating that foundering resistance may not have been the key functional requirement. Instead, a convex up orientation would have provided resistance to overturning in currents, in particular if the valves gaped widely. The ‘‘snowshoe’’ may not be the relevant paradigm for the shell morphology of these forms. An alternative is that they functioned more as a tip-resistant base, similar to those of garden umbrellas or stanchions.en_US
dc.description.sponsorshipNational Science Foundationen_US
dc.language.isoen_USen_US
dc.publisherJournal of Paleontologyen_US
dc.relation.ispartofseries87(5)en_US
dc.subjectfunctional morphology, brachiopodsen_US
dc.titleThe Orientation Of Strophomenid Brachiopods On Soft Substratesen_US
dc.typeArticleen_US


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