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.
|Commitee:||Ashley, Mary V.|
|School:||University of Illinois at Chicago|
|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|
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