Fluvidona Orphana Miller, Ponder & Clark, 1999

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Fluvidona orphana Miller, Ponder & Clark, 1999 Diagnostic features This species has less convex whorls than the others in the genus and is unusual in lacking a seminal receptacle and in having a lobe at the base of the distal part of the penis. Also, the operculum has Distribution of Fluvidona orphana. Fluvidona orphana (adult size 1.9-2.5 mm) more pegs (3-5). This is one of several species of Fluvidona found in northern New South Wales and southern Queensland. They are all very similar, being separated on small differences in size and shape of the shells and in anatomical details. They have elongate-conic shells with adults having a slightly thickened aperture and the operculum bears one or more pegs. Classification Fluvidona orphana Miller, Ponder & Clark, 1999 Class Gastropoda I nfraclass Caenogastropoda Order Littorinida Suborder Rissoidina Superfamily Truncatelloidea Family Tateidae Genus Fluvidona redale, 1937 Original name: Fluvidona orphana Miller, Ponder & Clark, 1999. Miller, A.C, Ponder, W.F. & Clark, S.A., 1999. Freshwater snails of the genera Fluvidona and Austropyrgus (Gastropoda, Hydrobiidae) from northern New South Wales and southern Queensland. nvertebrate Taxonomy 13: 461-493. Type locality: Small creek, Sea Acres Reserve, Port Macquarie, New South Wales. Biology and ecology On palm fronds, leaves etc. in small stream, common to abundant. Assumed to feed by scraping bacteria and possibly microalgae. Presumed solitary capsules with single egg. Direct development. Distribution Known from a single stream at Sea Acres Reserve, Port Macquarie, New South Wales. Notes Most species of Fluvidona are geographically isolated and have restricted ranges. This species is known from a small stream at Sea Acres Reserve, Port Macquarie. Further reading Miller, A. C., Ponder, W. F. & Clark, S. A. (1999). Freshwater snails of the genera Fluvidona and Austropyrgus (Gastropoda, Hydrobiidae) from northern New South Wales and southern Queensland, Australia. I nvertebrate Taxonomy 13: 461-493. To cite this resource: Ponder, W. F., Hallan, A., Shea, M. and Clark, S. A., Richards, K., Klungzinger, M., and Kessner, V. 2020. Australian Freshwater Molluscs. https://keys.lucidcentral.org/keys/v3/freshwater_molluscs/ To contact the authors for comment or suggestions, please email: [email protected] Copyright © 2020. All rights reserved. The Australian Museum. .

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