Description: Heterogen longispira (Smith, 1886) (Mollusca: Gastropoda: Viviparidae: Bellamyinae), a relatively large species of frehwater snail endemic to Lake Biwa, is the type species of the genus Heterogen Annandale, 1921 and the only member of it. Loc:
Lake Biwa, Off Katata,
Otsu, Shiga, Honshu, Japan. ナガタニシ（
タニシ科）の貝殻。
琵琶湖の固有種。（滋賀県
大津市堅田の沖で採取された個体）. Date:. Source: my own file. Author: This file is lacking author information. Permission (
Reusing this file): PD.
