Finding of Systrophia (S.) argentina n. comb. in the Argentine Precordillera, a century and a half after its description (Mollusca Gastropoda Scolodontoidea)

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12/2021
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Museo Argentino de Ciencias Naturales "Bernardino Rivadavia"
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Revista del Museo Argentino de Ciencias Naturales
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1514-5158
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. Systrophia argentina (Strobel, 1874) n. comb. es redescripta después de 150 años de su descubrimiento. Los ejemplares fueron encontrados en la Precordillera argentina (Quebrada San Isidro, provincia de Mendoza, Argentina), a 2.000 metros sobre el nivel del mar, cerca de su localidad típica. Ésta, aquí es restringida a Villa Vicencio y Casa de Piedra. Presenta una concha de tamaño mediano, planispiral, con 6 vueltas; rádula con placa central tricúspide, y dientes latero-marginales aculeados, fórmula: 13 – C – 13; vagina corta, ducto espermático alcanzando el extreme distal de la vagina, cerca del atrio; bolsa del pene larga, el pene ocupa la mayor parte de la bolsa peniana, epiphallus presenta un músculo retractor en su extremo; glándula cuadrangular grande adherida a la bolsa del pene; atrio muy corto. S. argentina es la única especie del género encontrada hasta el momento en la Argentina, siendo la distribución más austral de Systrophia L. Pfeiffer, 1855.
Systrophia argentina (Strobel, 1874) n. comb. is here re-described 150 years after its discovery. The specimens were found in the Argentine Precordillera (Quebrada San Isidro, Mendoza province, Argentina), at 2.000 m, near the typical locality of the species, here restricted to the Angostura or garganta (gullet) of Villa Vicencio and Casa de Piedra. It is the southernmost distribution of the genus. This snail has a shell of medium size, planispiral, with six whorls; radula with central plate tricuspid, and latero-marginal teeth aculeate, formula: 13 – C – 13; vagina short, spermathecal duct reaching the distal extreme of the vagina, near the atrium; penial sheath long, penis occupying most of the penial sheath, epiphallus with a retractor muscle adhered to its extreme, large and quadrangular gland attached to the penial sheath; atrium very short. S. argentina is the only species of Systrophia L. Pfeiffer, 1855 in Argentina, being the most austral distribution of the genus.
Systrophia argentina (Strobel, 1874) n. comb. is here re-described 150 years after its discovery. The specimens were found in the Argentine Precordillera (Quebrada San Isidro, Mendoza province, Argentina), at 2.000 m, near the typical locality of the species, here restricted to the Angostura or garganta (gullet) of Villa Vicencio and Casa de Piedra. It is the southernmost distribution of the genus. This snail has a shell of medium size, planispiral, with six whorls; radula with central plate tricuspid, and latero-marginal teeth aculeate, formula: 13 – C – 13; vagina short, spermathecal duct reaching the distal extreme of the vagina, near the atrium; penial sheath long, penis occupying most of the penial sheath, epiphallus with a retractor muscle adhered to its extreme, large and quadrangular gland attached to the penial sheath; atrium very short. S. argentina is the only species of Systrophia L. Pfeiffer, 1855 in Argentina, being the most austral distribution of the genus.
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