Bostryx ptyalum (Dall, 1910)

CLASSE: GASTROPODA: TERRESTRE

FAMÍLIA: BULIMULIDAE

ESPÉCIE: Bostryx ptyalum (Dall, 1910)

Tamanho médio: 25 mm 

Ocorrência: Peru (vale do Rio Pampas)

Localidade tipo: Peru, “margens do Rio Pampas”

Nome original: Bulimulus ptyalum Dall, 1910

Sinônimos: Bulimulus (Lissoacme) ptyalum Dall, 1910 

Descrição original:

(Dall, 1910): “Shell plump, conic, with a mammillary smooth brown nucleus and a generally bluish white color with sparse irregularly distributed black dots; nucleus with two and a half translucent whorls and an apical dimple; subsequent whorls feebly rounded, with an appressed suture which is in the earlier whorls laid against a peripheral angle of which there is no trace in the later ones; sculpture of fine feeble retractive flexuous wrinkles, usually with narrower interspaces, becoming obsolete on the last whorl, and crossed by line feeble spiral striation, most evident in the interspaces on the earlier whorls; last whorl somewhat produced, moderately rounded, andccurving roundly into a deep subcylmdnc umbilicus; aperture semilunate, the basal and outer margins paler, reflected; interior and pillar dark brownish; the lips approach each other on the body, the outer one hardly descending, the inner one wide, hardly reflected over the umbilicus; pillar without twist or fold. Height of shell 25; of last worl 18; of aperture 8.5; of umbilicus 1.7 mm.”

Fotos: (1-3) Bostryx ptyalum (Dall, 1910): Smithsonian National Museum of Natural History, HOLOTYPE USNM 209271, “On cacti and mimosa on the banks of the Rio Pampas, Peru”, coll. Dr H. Bingham, 25mm

Fontes:

Descrição original: (como Bulimulus ptyalum Dall, 1910) Dall, W. H. (1910). On some landshells collected by Dr. H. Bingham in Peru. Proceedings of the United States National Museum. 38 (1736): 177-182., disponível online em https://www.biodiversitylibrary.org/page/7615817
página(s): 181, fig. 3

Ramírez, R.; Paredes, C.; Arenas, J. (2003). Moluscos del Perú. Revista de Biologia Tropical. 51(supplement 3): página(s) 225-284

Weyrauch, W. K. (1958). Neue Landschnecken und neue Synonyme aus Südamerika, 1. Archiv für Molluskenkunde. 87 (4/6): 91-139, pl. 6-9. Frankfurt am Main.
página(s): 138; nota: mencionado como um sinônimo júnior de Bostryx rhodolarynx papillatus

MolluscaBase: https://www.molluscabase.org/aphia.php?p=taxdetails&id=1452054