Molecular systematics and evolution of reproductive traits of North American freshwater unionacean mussels (Mollusca: Bivalvia) as inferred from 16S rRNA gene sequences
Open Access
- 29 November 1996
- journal article
- Published by The Royal Society in Philosophical Transactions Of The Royal Society B-Biological Sciences
- Vol. 351 (1347), 1593-1603
- https://doi.org/10.1098/rstb.1996.0143
Abstract
North American freshwater unionacean bivalves are a diverse group of nearly 300 species. Unionaceans exhibit an array of conchological, anatomical, life history, and reproductive characteristics that have figured prominently in proposed classification schemes. Recently, two very different classifications of North American unionaceans have been proposed. Depending on the classification system utilized, a very different evolutionary trajectory of anatomical and reproductive features is obtained. The lack of a robust, well corroborated phylogeny of North American unionacean bivalves hinders the progress of evolutionary and ecological studies involving these species. Here we present a mitochondrial DNA (mtDNA) based phylogeny for North American unionacean mussels and compare it to previously proposed classifications. In addition, we present a `total evidence' phylogeny which incorporates both the mtDNA sequence data and available morphological data. The molecular and total evidence phylogenies agree largely with the conclusions of a previous study based largely on immunoelectrophoretic data. North American unionaceans can be divided into two families: the Unionidae, which is comprised of most of the species and the Margaritiferidae. Within the Unionidae are two subfamilies, the Anodontinae and Ambleminae. The resultant phylogeny was used to examine the evolution of several key anatomical features including the number of gills (demibranchs) used by females to brood developing embryos, incubation length (bradytictic vs tachytictic), larval (glochidial) tooth structures, and shell texture. Both molecular and total evidence phylogenies indicate several of the aforementioned characters evolved independently or were subsequently lost or gained in several lineages.Keywords
This publication has 30 references indexed in Scilit:
- A Diverse and Endangered Aquatic Ecosystem of the Southeast United StatesConservation Biology, 1995
- Conservation Status of Freshwater Mussels of the United States and CanadaFisheries, 1993
- The phylogenetic relationships of flies in the family drosophilidae deduced from mtDNA sequencesMolecular Phylogenetics and Evolution, 1992
- Ribosomal RNA in Vertebrates: Evolution and Phylogenetic ApplicationsAnnual Review of Ecology and Systematics, 1990
- CLUSTAL: a package for performing multiple sequence alignment on a microcomputerGene, 1988
- The mitochondrial DNA molecule ofDrosophila yakuba: Nucleotide sequence, gene organization, and genetic codeJournal of Molecular Evolution, 1985
- CONSENSUS CLADOGRAMS AND GENERAL CLASSIFICATIONSCladistics, 1985
- Molecular genetics and speciation in Elliptio and its relationships to other taxa of North American Unionidae (Bivalvia)Biological Journal of the Linnean Society, 1981
- A simple method for estimating evolutionary rates of base substitutions through comparative studies of nucleotide sequencesJournal of Molecular Evolution, 1980
- Notes on the Unionidæ and Their ClassificationThe American Naturalist, 1903