Species Catalogue of Orthalicoidea in Argentina (Gastropoda: Stylommatophora)

Abstract

We provide here a catalogue of all available species nomina of Orthalicoidea occurring in Argentina. Ongoing taxonomic revisions on the genera Bostryx Troschel, 1847, Clessinia Doering, 1874, Pilsbrylia Hylton Scott, 1952, and Spixia Pilsbry & Vanatta, 1898, highlighted the necessity of an updated catalogue for the region. A total of 101 orthalicoidean species classified into four families, Bothriembryontidae, Bulimulidae, Odontostomidae and Simpulopsidae are present in Argentina. The catalogue provided here is based on examination of primary literature, available revisions and monographs, comparative studies within and among species and revision of museum data, including most type specimens. Additional collection of specimens in various localities of the country was carried out for more than a decade to be able to accurately state distributional information on the species treated. Nomenclatural details are provided for all nominal species. Name-bearing types were located for 86 species-group taxa, and six lectotypes were designated for the stabilization of the taxonomy. We propose the following nine new combinations:

The genus Bostryx in central western Argentina: anatomical and distributional description of four of its southernmost species (Gastropoda, Bulimulidae)

“…Based on molecular analysis performed by Breure & Romero (2012), Breure (2012) indicated that B. strobeli could be classified as Naesiotus Albers. However, according to the sculpture of the protoconch observed, typical of the genus Bostryx, and several anatomical characters such as a penis with cup shape and internally with triangular penial gland and a portion with sculpture (consisting in folds) and other without sculpture, and an epiphallus with variable diameter and two different sculptures in the inner wall, the present study concludes that of B. strobeli must be maintained in Bostryx as proposed by Cuezzo et al (2013). Miquel (1995) synonymized B. strobeli and Bulimulus (Scansicochlea) lolae Hylton Scott, 1967 because their shell characters were very similar.…”

“…This author considered that Peronaeus (Lissoacme) puntanus Parodiz, 1947 is a synonym of B. pastorei, given the fact that both species have similar shells. This synonymy was maintained by Cuezzo et al (2013) and on basis of the observation of type material of both species, has been reformulated in the present study. Bostryx pastorei shows high variability in shell coloration, body whorl area, aperture shape and spire height.…”

“…However, Parodiz (1947) described and published this new species under the name of Peronaeus (Lissoacme) reedi. Later Breure (1979) classified it under Bostryx, which was maintained by Miquel (1993) and Cuezzo et al (2013) subsequently.…”

“…This contrast determines a continuous and arid vegetation belt (around 30°S) that crosses diagonally from SE to NW, separating the region of the Chilean-Argentinian southern forests from other forests in South America, the so called Arid Diagonal of South America (Villagran & Hinojosa, 1997;Abrahan de Vazquez et al, 2000). In Argentina, Bostryx is the genus of Bulimulidae with most species (Cuezzo et al, 2013). Of the 19 species found in the country, 17 are endemic whereas Bostryx stelzneri (Dohrn, 1875) is distributed throughout Bolivia and Bostryx torallyi (d'Orbigny, 1835) throughout Bolivia, Paraguay and Peru (Quintana, 1982;Ramírez et al, 2003).…”

“…According to the classification proposed by Olson & Dinerstein (1998) and Olson et al (2001), this region is characterized by the presence of seven dry ecoregions (Southern Andean Steppe, Central Andean Puna, High and Low Monte, Dry Chaco, Patagonian Steppe and Espinal). In this region the genus Bostryx has a notably high richness, and is represented by 9 of its 19 Argentinian species (Miquel, 1993(Miquel, , 1995Cuezzo et al, 2013).…”