Drepanotrema anatinum (A. d’Orbigny, 1835)

CLASSE: GASTROPODA: ÁGUA DOCE

FAMÍLIA: PLANORBIDAE

ESPÉCIE: Drepanotrema anatinum (A. d’Orbigny, 1835)

Tamanho médio: 3 mm

Ocorrência: em toda América do Sul (Breure et al. 2022)

Localidade tipo: “Bahia, Brasil” para Helix shuttleworthi L. Pfeiffer, 1851

Nome original: Planorbis anatinus A. d’Orbigny, 1835

Sinônimos: Anisus (Gyraulus) lenzi van Benthem Jutting, 1943; Drepanotrema (Drepanotrema) anatinum (A. d’Orbigny, 1835); Guestieria shuttleworthi (L. Pfeiffer, 1851); Helix shuttleworthi L. Pfeiffer, 1851; Planorbis anatinus A. d’Orbigny, 1835; Planorbis aracasensis Gundlach, 1857; Planorbis esperanzensis Tryon, 1866; Planorbis haldemani C. B. Adams, 1849; Planorbis isabel G. B. Sowerby II, 1877; Planorbis nigellus Lutz, 1918; Planorbis yzabalensis Crosse & P. Fischer, 1879; Spirulina anatina (A. d’Orbigny, 1835)

Redescrição de:

(Roosen & Breure, 2024): “shell minute (diameter ca. 3 mm), translucent, with a deeply sunken spire. Spire deeply sunken, barely visible in a narrow apical umbilicus. Of the exposed part of the early whorls, the first half has no microsculpture besides and slightly flexuous growth lines. The rest of the shell is covered with spirally oriented papillae, which are denser on the base of the shell. Aperture slender crescent-shaped, with a thin, simple peristome. Umbilicus narrow, funnel-shaped, about 27% of total width”

Fotos: Natural History Museum, London; SYNTYPE de Helix shuttleworthi L. Pfeiffer, 1851, NHMUK 1991115, Bahia, Brasil, col. Hugh Cuming, ~3mm

Fontes:

Descrição original: (como Helix shuttleworthi L. Pfeiffer, 1851) Pfeiffer, L. (1851). Beschreibung neuer Landschnecken. Zeitschrift für Malakozoologie. 8(1): 10-16 [31 May], 8(2): 25-29 [30 June]., disponível online em https://www.biodiversitylibrary.org/page/16300510
página(s): 14

Descrição original: (como Planorbis anatinus A. d’Orbigny, 1835) Orbigny, A. d’. (1835). Synopsis terrestrium et fluviatilium molluscorum, in suo per Americam meridionalem itinere collectorum. Magasin de Zoologie. 5(61): 1-44., disponível online em https://www.biodiversitylibrary.org/page/2633132
página(s): 28

Roosen, M. T. & Breure, A. S. H. (2024). Revision of the genera of Scolodontidae, part 2: Guestieria Crosse, 1872, Xenodiscula Pilsbry, 1919, and a misidentified planorbid. Journal of Conchology. 45(2): 245-250, figs. 1-2 [6 Oct.].
página(s): 248

Molluscabase: https://www.molluscabase.org/aphia.php?p=taxdetails&id=848728