Title

Changes in Shell Morphology in Elimia Comalensis (Gastropoda: Pleuroceridae) from the Edwards Plateau, Texas, USA

Department

Ecology, Evolution, and Organismal Biology

Document Type

Article

Publication Date

12-2007

Abstract

Species in the pleurocerid genus Elimia are important components of freshwater systems in the eastern United States, but little is known about their natural history. Using dual-simultaneous linear regression and principal components analyses, we show patterns of morphological change in two populations of E. comalensis from the Edwards Plateau, Texas. Both populations had similar rates of change for all shell measurements analyzed, and both showed similar decreases in growth as total length of shell increased. However, the size at which growth slowed was different between populations, and small shells tended to have a consistent shape, while larger shells were more variable.

Journal

The Southwestern Naturalist

Journal ISSN

0038-4909

Volume

52

Issue

4

First Page

475

Last Page

481

Digital Object Identifier (DOI)

/10.1894/0038-4909(2007)52[475:CISMOE]2.0.CO;2