Origin and Evolution of the Gastropod Family Pomatiopsidae, with Emphasis on the Mekong River Triculinae
Academy of Natural Sciences, Dec 1, 2007 - 120 pages
Describes an extraordinary endemic radiation of hydrobioid snails in the Mekong River (MR). The monophyletic radiation involving the subfamily Triculinae, 3 tribes, 11 genera, & 92 species, is larger than contemporaneous endemic freshwater gastropod faunas of centers of endemism, such as lakes Tanganyika & Baikal. The study addresses the issue of how higher taxa arise by analyzing the series of adaptive radiations within the MR Triculinae. The worldwide family Hydrobiidae is polyphyletic & includes 2 distinct lineages, the Hydrobiidae sensu stricto & the Pomatiopsidae with the subfamilies Pomatiopsidae & Triculinae. The differences between the two families were masked by convergence in shell, radula, penis, & operculum. Maps & illus.
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adaptive America amphibious anatomical Annandale aperta Asia Australia Bavay Blanfordia body whorl Brandt bursa bursa copulatrix Cecina central tooth characters China cladogenesis coil columella common sperm duct convergence Coxiella crooki cusp Davis deferens efferens endemic evolution evolved fauna female reproductive system fossil freshwater Fukuia gastropod genera genus gonad Gondwanaland habitats Halewisia harmandi Hubendickia hupensis Hydrobiidae hydrobioid Hydrorissoia India Indian Plate Japan Jullienia Jullieniini Karelainia Khemarat Khong Island Lacunopsini Lacunopsis lake Lithoglyphus living lobes mantle cavity marine Mekong River Miocene monotypy morphology nodes Oncomelania ovate-conic oviduct Pachydrobia Pachydrobiella pallial oviduct Paraprososthenia penis phenetic phenogram phyletic Pilsbry planispiral Pomatiopsidae posterior prososthenia radiation radula resembles ribs Rissoacea Rissoidae River Triculinae rocks Saduniella sculpture seen seminal receptacle seminal vesicle shell shape siamensis smooth snails South Africa spermathecal duct spiral subfamily Superfamily sympatric taxa tectonic Temcharoen Thailand tion Tomichia tribe Tricula Triculinae triculine taxa Type Species vas deferens Yangtze Yunnan