Item Description

Show full item record

Title: Molecular Systematics of the Endangered O‘ahu Tree Snail Achatinella mustelina: Synonymization of Subspecies and Estimation of Gene Flow between Chiral Morphs. 
Author: Holland, Brenden S.; Hadfield, Michael G.
Date: 2007-01
Publisher: Honolulu, University of Hawaii Press
Citation: Holland BS, Hadfield MG. Molecular Systematics of the Endangered O‘ahu Tree Snail Achatinella mustelina: Synonymization of Subspecies and Estimation of Gene Flow between Chiral Morphs. Pac Sci 61(1): 53-66.
Abstract: The single-island endemic O‘ahu tree snail Achatinella mustelina Mighels, 1845 is an endangered species with dimorphic shell chirality, persisting in small populations restricted to upper-elevation native forest in the Wai‘anae Mountains. We used an intraspecific molecular phylogeny (n ¼ 21 populations) to evaluate the validity of subspecies, most of them introduced by Welch in 1938 on the basis of shell characters, by determining whether the nominal subspecies examined correspond to detectable molecular partitions and to examine the possibility that opposing shell chirality acts as a reproductive isolating mechanism. We mapped the nominal subspecies and shell chiralities onto a mitochondrial DNA (mtDNA) phylogram based on 86 cytochrome c oxidase I gene fragments and the extant range of the species. Although clear genetic breaks and haplotype clusters with well-defined boundaries exist and correspond to topographic features, each of the five monophyletic clades in the gene tree contains multiple supposed subspecies, haplotypes are shared between different subspecies, and none of the 13 nominal subspecies exhibits monophyly. Furthermore the mtDNA clades in the gene tree do not correspond to observed patterns in shell chirality, and both chiralities occur in all clades. Thus, the subspecies are not taxonomically valid and have no relevance for conserving genetic diversity, and chirality differences do not appear to impart a reproductive barrier in this species. Therefore, all subspecies of A. mustelina are herein synonymized.
Series/Report No.: vol. 61, no. 1
Description: v. ill. 23 cm. Quarterly
Pages/Duration: 14 p.
ISSN: 0030-8870
URI: http://hdl.handle.net/10125/22598
LC Subject Headings: Natural history--Periodicals.
Science--Periodicals
Natural history--Pacific Area--Periodicals.

Item File(s)

Files Size Format View
vol61n1-53-66.pdf 25.28Mb PDF View/Open

This item appears in the following Collection(s)

Search


Advanced Search

Browse

My Account

Statistics

About