Odontostomus degeneratus Pilsbry, 1898

CLASSE: GASTROPODA: TERRESTRE

FAMÍLIA: ODONTOSTOMIDAE

ESPÉCIE: Odontostomus degeneratus Pilsbry, 1898

Tamanho médio: 21 mm

Ocorrência: Brasil (Paraná)

Localidade tipo: Brasil, Paraná, Palmeiras

Nome original: Odontostomus degeneratus Pilsbry, 1898

Descrição original:

(Pilsbry, 1898): “Shell oblong-turreted, minutely perforated, thin but moderately strong, pale yellowish-green tinted. Surface hardly shining, striated in the direction of growth-lines, the striac hardly visible without the aid of a lens, under which they are seen to be thread-like, well raised, finely but rather superficially cut into beads by decussating spirals which crenulate the summits of the strise.

Spire convexly conic, the apex obtuse; whorls nearly 6, quite convex, the earlier 1 1/2 densely spirally striated, the last whorl becoming free and sonmewhat descending in front, constricted and showing 3 small pits behind the outer lip, bicarinate at base, the keels short, outer one strongly pinched up, the ininer low, rounded, a distinct depression between them.

Aperture oblique, quadrangular-oblong, nearly 1/3 the total length of the shell, obstructed by a strong columellar fold which terminates below in a transverse lamella, aind by 6 small, tubercuili-form teeth: one upon the parietal margin close to its posterior termination, three upon the outer lip, the uppermost quite small, and with the parietal denticle, defining a small rounded posterior sinus or notch, the others low, removed fromn the lip-edge; basal tooth median; columellar tooth below the columellar fold. Peristome white, narrowly reflexed, continuous and free throughout.”

Fotos: (1-3) The Academy of Natural Sciences, Philadelphia: HOLOTYPE ANSP 78025,  Palmeiras, “Province of Paraná, Brazil”, doação von Ihering em iii.1900

Fontes:

Descrição original: Pilsbry, H. A. (1898). New species of Odontostomus from Brazil and Argentina. Proceedings of the Academy of Natural Sciences of Philadelphia. 50: 471-474

Simone, L. R. L. (2006). Land and Freshwater Molluscs of Brazil. Editora Gráfica Bernardi, FAPESP. São Paulo, 390 pp. página(s): 161

Molluscabase: https://www.molluscabase.org/aphia.php?p=taxdetails&id=1446895