On the Contribution of Allometry to Morphological Variation in a Freshwater Gastropod Elimia Livescens

Dustin A.S. Owen, Anna Settineri, Stephen J. Jacquemin, Mark Pyron

Abstract


Morphological variation attributable to allometry in the freshwater gastropod
Elimia livescens Menke, 1830 is described. Geometric morphometric analyses were used to
examine shape variation and visual ontogenic deformation patterns for a population of E.
livescens along the West Fork of the White River, Delaware County, Indiana. A strong
allometric slope from more globose and robust shelled smaller individuals to increasingly
fusiform shell shapes in larger individuals was identified. The relatively high allometric
slope was interpreted as evidence of functional importance and maintenance through
selection.

Keywords


gastropods, morphology, allometry

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