Rectartemon iguapensis (Pilsbry, 1930)

CLASSE: GASTROPODA: TERRESTRE

FAMÍLIA: STREPTAXIDAE

ESPÉCIE: Rectartemon iguapensis (Pilsbry, 1930)

Tamanho médio: 23 mm

Habitat: vive no solo, sob folhas, ou enterrado parte do tempo

Ocorrência: Brasil [São Paulo (Iporanga, Iguape, Itanhaem)]

Localidade tipo: Iguape, São Paulo

Nome original: Artemon iguapensis Pilsbry, 1930

Comentários: HOLOTYPE depositado The Academy of Natural Sciences, Philadelphia, ANSP 152245,  recebido de H. von Ihering

Descrição original:

(Pilsbry, 1930): ” The shell is umbilicate (the umbilicus perspective, contained about 54 times in the diameter of shell); somewhat lenticular, the spire being conic, base convex, periphery angular; thin but moderately strong. Periostracum very glossy, naphthalene yellow at the base, lighter with a silky gloss on the upper surface. Whorls 64, moderately convex, the last bluntly but distinctly angular peripherally. Suture moderately impressed. Sculpture: first 21 whorls smooth, the rest with fine, close, slightly curved rib-striae about equal to their intervals.

In some places a few little transverse impressions indent the ribs and intervals; on the last whorl the rib-striae disappear at the periphery leaving the base almost smooth. Four very slightly projecting growth-rest lines divide the smooth base, showing former peristomes, which, however, were not noticeably expanded. The aperture is oblique, trapezoidal-lunate. The white peristome is narrowly expanded in the outer part, narrowly reflected basally, and somewhat dilated at the columella; its remote insertions are joined by a very thin, transparent callus.”

Fotos: (1) cortesia Femorale, Rectartemon iguapensis, Iguape, São Paulo, TOPOTYPE

Figura: Salvador R.B. (2018): (1–3) Rectartemon depressus, MZSP 125447 (H = 11.7 mm, D = 18.7 mm); (4–6) Rectartemon iguapensis, MZSP 133139 (H = 9.8 mm, D = 14.8 mm); (7–9) Rectartemon piquetensis, MZSP 133139 (H = 14.2 mm, D = 21.0 mm); (10–12) Streptartemon extraneus, specimen #1, MZSP 123558 (H = 6.1 mm, D = 7.2 mm); (13) Streptartemon extraneus, specimen #2, MZSP 123558 (H = 6.6 mm, D = 6.7 mm)

Fontes:

Descrição original: (como Artemon iguapensis Pilsbry, 1930)  Pilsbry, H. A. (1930). South American land and freshwater mollusks. Notes and description, 7. Proceedings of the Academy of Natural Sciences of Philadelphia. 82: 355-365.
página(s): 363, pl. 32, figs. 4, 4a, 4b

Simone, L. R. L. (2006). Land and Freshwater Molluscs of Brazil. Editora Gráfica Bernardi, FAPESP. São Paulo, 390 pp.
página(s): 198

Brown, K. (2023). A guide to the hunter shells. Vol. 2. The Streptaxoidea. The Enneinae, Orthogibbinae, Marconiinae, Odontartemoninae, Streptaxinae and the Diapheridae. ConchBooks, Germany.
página: 332

Salvador R.B. (2018). Notes on a new collection of Streptaxidae (Gastropoda: Stylommatophora) from Brazil, with descriptions of two new species of Streptaxis. Integrative Systematics. 1: 25-33., disponível online em https://doi.org/10.18476/insy.v01.a4
página(s): 27, figs 4-6

MolluscaBase: https://www.molluscabase.org/aphia.php?p=taxdetails&id=1317083