Aulacospira
Aulacospira is a genus of air-breathing land snails, terrestrial pulmonate gastropod mollusks in the family Hypselostomatidae.
Description
The shell is small, eccentrically umbilicate, and similar in structure to those of the Fruticicola. It is thin, horny, and uniform in color. From its pointed apex, the spire is somewhat scalariform and carinate. There are 4 to 5 finely striated whorls, which are flattened and concave due to a spiral groove; on the body whorl, the keel sometimes fades away. The aperture is oblique and generally subcircular, equipped with between 0 and 5 teeth. The peristome is reflected and scarcely thickened.The shell is small—measuring 1.5 mm in height and 2.9 mm in width—and possesses a helicoid shape that is either depressed or triangular, making it notably wider than it is high. Its color is a uniform brown or purplish hue. The apex is prominent, featuring a protoconch that is either smooth or covered with a dense mesh of granular reticulation.
The teleoconch appears relatively smooth, though it is marked by uneven, oblique striae. The spire is slightly concave and, in some specimens, takes on a scalariform appearance. The body whorl can be either keeled or rounded and often features a distinct groove located below the suture. The shell is umbilicate, with an umbilicus that ranges from narrow to moderately narrow. Finally, the aperture is oblique and rounded, typically equipped with zero to five apertural teeth, while the peristome is thin and expanded.
Species
Aulacospira conica Vermeulen, Phung & Truong, 2007Aulacospira depressa Dumrongrojwattana & Panha, 2006Aulacospira furtiva Vermeulen & S. Aiken, 2020Aulacospira hololoma Aulacospira khaobote Dumrongrojwattana & Panha, 2006Aulacospira khaopratun Dumrongrojwattana & Panha, 2005Aulacospira krobyloides Páll-Gergely & Schilthuizen, 2019Aulacospira lampangensis Panha & J. B. Burch, 2002Aulacospira lens Páll-Gergely & Auffenberg, 2019Aulacospira mucronata Aulacospira nutadhirai Dumrongrojwattana & Tanmuangpak, 2020Aulacospira panhai Dumrongrojwattana, 2008Aulacospira pluangtong Panha & J. B. Burch, 2004Aulacospira porrecta Quadras & Möllendorff, 1894Aulacospira rhombostoma Quadras & Möllendorff, 1896Aulacospira scalatella Aulacospira smaesarnensis Panha & J. B. Burch, 2002Aulacospira tekavongae Dumrongrojwattana & Tanmuangpak, 2020Aulacospira triptycha Quadras & Möllendorff, 1895Aulacospira vanwalleghemi Dumrongrojwattana & Tanmuangpak, 2020;Synonyms:Aulacospira azpeitiae Hidalgo, 1890: synonym of Pseudostreptaxis azpeitiae Aulacospira depressa : synonym of Tonkinospira depressa Aulacospira depressiana Dumrongrojwattana & Panha, 2006: synonym of Aulacospira depressa Dumrongrojwattana & Panha, 2006