Marstonia comalensis
Species of gastropod / From Wikipedia, the free encyclopedia
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Marstonia comalensis is a species of minute freshwater snail with a gill and an operculum, an aquatic gastropod mollusk or micromollusk in the family Hydrobiidae. It is found in south central Texas, United States.
Marstonia comalensis | |
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Shell of one of the lectotypes of Marstonia comalensis. Scale bar is 1.0 mm. | |
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Subfamily: | Nymphophilinae |
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Species: | M. comalensis |
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Marstonia comalensis | |
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Marstonia comalensis is large for this genus. It has an ovate-conic, openly umbilicate shell. The penis has a short filament and oblique, squarish lobe bearing a narrow gland along its distal edge.[2] It is well differentiated morphologically from other congeners that have similar shells and penes, and is also genetically divergent relative to those congeners that have been sequenced (mtCOI divergence 3.0–8.5%).[2]
This species has often been confused with Cincinnatia integra.[2]