Symptychiella fratermajor H. Nordsieck, 2010

CLASSE: GASTROPODA: TERRESTRE

FAMÍLIA: CLAUSILIIDAE

ESPÉCIE: Symptychiella fratermajor H. Nordsieck, 2010

Tamanho médio: 14.3 – 17.4 mm

Ocorrência: Peru (San Martin)

Localidade tipo: Peru, San Martin, “path along river from village Aguas Claras to Cuevas de Aguas Claras (100 km NW Moyobamba)”

Altitude: 950 m

Nome original: Symptychiella (Symptychiella) fratermajor H. Nordsieck, 2010

Etimologia: o nome da espécie é uma referência ao tamanho relativamente maior que a espécie S. (S.) bilamellata, do Latim “frater” = irmão (=brother), “major” = maior (=larger)

Descrição original:

(Nordsieck, 2010): “Shell with conical or somewhat attenuated apical part, whorls much rounded, protoconch not broader than following whorls; yellowish-white to -brown, in part yellowish-grey; teleoconch whorls distinctly densely rib-striated, lower ones not more weakly, on the neck rib-striation more irregular and in part stronger; neck rounded, subsutural swelling indistinct; aperture descending, broadly oval-piriform, rarely roundish-oval, yellowish-white to -brown within, peristome hardly expanded; superior lamella of different length and height; inferior lamella high in position, ascending with a weak spiral, high, in part moderately high inwards, in front ending or continuous on the columellar edge, inner part of inferior lamella separated from inferior lamella, beside interruption of both parts (inner) rudiment of spiral lamella present;

subcolumellar lamella descending to the lunellar, lower end separated from lunella; lunellar dorsolateral in position, occasionally dorsolateral-lateral; upper palatal plica of different length, connected with lunella by an angle, lunella mostly weakly developed, especially basally, in part missing, rudiment of principal plica nearly always present, surpassing upper palatal plica in front, like the latter of different length; clausilium plate in oblique view mostly fully visible, in part nearly fully or hardly, distally with outer corner, mostly ± leaving gaps at the palatal side”

Fotos: (1) Forschungsinstitut und Naturmuseum Senckenberg: HOLOTYPE de Symptychiella fratermajor, SMF 329324, Peru, “Dept. San Martin, path along river from village Aguas Claras to Cuevas de Aguas Claras (100 km NW Moyobamba) (cave, 950m)”, 12.x.2007, leg. Hemmen, 16.2mm

Figura: Nordsieck, 2010:

(21) Symptychiella bilamellata laevigata, HOLOTYPE SMF 329326, “Peru, Dept. San Martin, from Aguas Claras to Cuevas de Aguas Claras (1020 m)”, 22.i.2007, leg. Hemmen, 14.35 mm;

(22) Symptychiella bilamellata costulata, HOLOTYPE SMF 330169a, “Peru, Dept. San Martin, Cueva Aguas Verdes (1140 m)”, 24.i.2007, leg. Hemmen, 13.0 mm;

(23) Symptychiella bilamellata gracilicosta, HOLOTYPE SMF 330877, “Peru, Dept. San Martin, Cueva Huacharos de la Encanada (910 m)”, 6.x.2007, leg. Hemmen, 13.65 mm;

(24) Symptychiella fratermajor, HOLOTYPE SMF 329324, “Peru, Dept. San Martin, from Aguas Claras to Cuevas de Aguas Claras (950 m)”, 12.X.2007, leg. Hemmen, 16.2 mm;

(25) Symptychiella acuminata, HOLOTYPE SMF 330878, “Peru, Dept. San Martin, from Nueva Cajamarca to Cerro Mirador (925 m)”, 13.x.2007, leg. Hemmen, 17.4 mm

Fontes:

Descrição original: (como Symptychiella (Symptychiella) fratermajor H. Nordsieck, 2010) Nordsieck, H. (2010). New taxa of the subfamilies Neniinae and Garnieriinae (Gastropoda: Stylommatophora: Clausiliidae). Archiv für Molluskenkunde, 139 (1): 45-69, 4 pls. Frankfurt am Main.
página(s): 57, fig. 24

Senckenberg. Collection Mollusca SMF. Occurrence dataset https://doi.org/10.15468/ohuexz accessed via GBIF.org on 2025-12-13. https://www.gbif.org/occurrence/318506770

Molluscabase: https://molluscabase.org/aphia.php?p=taxdetails&id=1291563