Dissertation/Thesis Abstract

Evolution of the Isognomonidae Woodring, 1925: Phylogenetic and Morphometric Analyses
by Wilk, John A., Ph.D., University of Illinois at Chicago, 2016, 516; 10307881
Abstract (Summary)

The Isognomonidae Woodring, 1925 are a pan-tropical family of bivalves that share a system of hinge-ligament strengthening elements called resilifers and a tendency for highly variable shell-shapes. Using an innovative combination of molecular phylogenetics and geometric morphometric shape analysis I directly compare identified genetic groups to the original type-specimen shells. This method was used to produce a robust taxonomic revision where synonymy was tested empirically. Using a novel, vector-based, approach to describe ontogenetic trends within related groups I also evaluated the deeper clades revealed by the phylogenetic analysis for taxonomic utility. The resulting classification designates this monophyletic group as a sub-family, Isognomoninae, which is divided into two genera, Isognomon and Melina, which contain 21-22 species.

Indexing (document details)
Advisor: Ashley, Mary
Commitee: Ashley, Mary V.
School: University of Illinois at Chicago
Department: Biological Sciences
School Location: United States -- Illinois
Source: DAI-B 78/07(E), Dissertation Abstracts International
Subjects: Evolution and Development
Keywords: Allometry, Bivalves, Classification, Ecophenotypic variation, Geometric morphometrics, Ontogeny, Phylogeny, Pterioidea, Species delimitation, Taxonomy
Publication Number: 10307881
ISBN: 978-1-369-53306-4
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