File:American malacological bulletin (1987) (17970445609).jpg

Title: American malacological bulletin
Identifier: americanmal4519861987amer (find matches)
Year: 1983 (1980s)
Authors: American Malacological Union
Subjects: Mollusks; Mollusks
Publisher: (Hattiesburg, Miss. ?) : (American Malacological Union)
Contributing Library: Smithsonian Libraries
Digitizing Sponsor: Biodiversity Heritage Library

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Fig. 4. Drawings of the interstitial molluscs from coarse sand environments on Viti Levu, Fiji: A. Pseudunela sp. (3.5 mm long); B. Hedylopsis sp. (1.2 mm long); C. Paraganitus ellynnae (2.5 mm long); D. Gastrohedyle sp. (1.2 mm long); E. Pseudovermis sp. (eyed, 4 mm long); F. Pseudovermis sp. (eyeless, 3.5 mm long); G. Philinoglossa sp. (2.3 mm long); H. Meiomenia sp. (1.3 mm long). in habitat and size. They live in mountain streams on the underside of rocks and range in size from 3 to 8 mm in length. Those that have been described have a well developed heart- kidney complex and accessory male reproductive structures such as a penis and penis stylet. Professor Starmuhlner (University of Vienna) collected freshwater forms from the undersides of rocks in Fiji (pers. comm.). In my collections in Fiji, four genera of marine interstitial acochlidaceans were found. If the freshwater forms were derived from the interstitial acochlidiaceans, it would be predicted that the ancestral group would have internal structures, that is, accessory reproductive organs and kidney, that were similar. One of the species collected, Pseudunela sp., was found to have a well developed heart, a large kidney and a penis with a stylet. Thus

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