Sexual dimorphism in shell size of the land snail Leptopoma perlucidum (Caenogastropoda: Cyclophoridae)

Liew, Thor Seng and Phung, Chee-Chean and Choo, Ming-Huei (2022) Sexual dimorphism in shell size of the land snail Leptopoma perlucidum (Caenogastropoda: Cyclophoridae). PeerJ, 10 (e13501). pp. 1-12. ISSN 2167-8359

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URL: https://peerj.com/articles/13501/

Abstract

Sexual dimorphism in the shell size and shape of land snails has been less explored compared to that of other marine and freshwater snail taxa. This study examined the differences in shell size and shape across both sexes of Leptopoma perlucidum land snails. We collected 84 land snails of both sexes from two isolated populations on two islands off Borneo. A total of five shell size variables were measured: (1) shell height, (2) shell width, (3) shell spire height, (4) aperture height, and (5) aperture width. We performed frequentist and Bayesian t-tests to determine if there was a significant difference between the two sexes of L. perlucidum on each of the five shell measurements. Additionally, the shell shape was quantified based on nine landmark points using the geometric morphometric approach. We used generalised Procrustes and principal component analyses to test the effects of sex and location on shell shape. The results showed that female shells were larger than male shells across all five measurements (all with p-values < 0.05), but particularly in regards to shell height and shell width. Future taxonomic studies looking to resolve the Leptopoma species’ status should consider the variability of shell size caused by sexual dimorphism.

Item Type:	Article
Keyword:	Malaysia , Sulu , Taxonomy , Shell evolution , Gastropods , Shell morphometric , Sexual selection
Subjects:	Q Science > QL Zoology > QL1-991 Zoology > QL360-599.82 Invertebrates
Department:	INSTITUTE > Institute for Tropical Biology and Conservation
Depositing User:	SAFRUDIN BIN DARUN -
Date Deposited:	30 Sep 2022 18:50
Last Modified:	30 Sep 2022 18:50
URI:	https://eprints.ums.edu.my/id/eprint/34173

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