Gastrocopta pentodon (Say, 1822) Comb Snaggletooth

2.1 mm.

Gastrocopta pentodon (Say, 1822) Comb Snaggletooth

    In wrack along Sunfish Creek, Bardstown, Nelson Co., Kentucky 7/27/2013 | Digital image by Lori Schroeder

1.8 mm.

Gastrocopta pentodon (Say, 1822) Comb Snaggletooth

    In wrack along Sunfish Creek, Bardstown, Nelson Co., Kentucky 7/27/2013 | Digital image by Lori Schroeder

Gastrocopta pentodon (Say, 1822) form carnegiei (Sterki, 1916)

    Described as a distinct species, this morph is characterized by (1) its lack of callous apertural rim bearing several denticles and (2) possession of inset/penetrating palatal and infrapalatal lamellae. Hubricht (1968: 6) wrote "occasionally a specimen of G. pentodon will become mature and develop the teeth one whorl short of the usual number. Such specimens were named Gastrocopta [sic; actually Bifidaria] carnegiei by Sterki. Gastrocopta tappaniana produces similar aberrations." Aberrant process notwithstanding, this form is quite a handsome and distinctive shell.

Gastrocopta pentodon (Say, 1822) form carnegiei (Sterki, 1916)

    Collected from wrack along Harrison Creek near the Bean Lodge driveway, Nelson Co., Kentucky,  May 25, 2013 (1.9 mm.). Digital image by Jeff and Lori Schroeder.
Hubricht, L., 1968. The land snails of Kentucky. Sterkiana 32: 1-6. December.

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