2023 Early Hearing Detection & Intervention Conference

March 5-7, 2023 • Cincinnati, OH

6/08/2017 | 2:15 PM - 2:30 PM | THE FRESHWATER GASTROPODS OF THE OHIO | 302C

THE FRESHWATER GASTROPODS OF THE OHIO

We report preliminary results from a survey of the freshwater gastropod fauna from the Ohio River basin above Paducah, including western Pennsylvania and most of West Virginia, Ohio, Kentucky, and Indiana. Our database of 4,746 records was almost entirely drawn from state natural resource agencies (36%), museums (30%) and our own original collections (30%), almost all personally examined and verified. We report 66 species and subspecies of freshwater gastropods, the most common of which are Physa acuta (959 incidences), Ferrissia rivularis (536), and Pleurocera semicarinata (all subspecies combined 528). Nine species were collected in but a single population, four of which seem to be legitimately rare, the remainder peripheral. The distribution of commonness and rarity appeared log-2 bimodal, with mean 3.84 (14.3 incidences) and standard deviation 2.79 (6.9 incidences). Our Ohio River basin results are compared to similar databases previously assembled from the Atlantic drainages and from East Tennessee, and the 99 species of the combined 13-state fauna ranked by their incidence.

C03 Invertebrates
C35 Systematics and Taxonomy
C18 Biodiversity

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Presenters/Authors

Robert T. Dillon, Jr. (), Freshwater Gastropods of North America, dillonr@fwgna.org;