Amphidromus roseolabiatus is a species of terrestrial gastropod in the family Camaenidae.
Distribution Distribution of Amphidromus roseolabiatus includes central and northern Laos, Nan Province in Thailand and Phong Nha-Kẻ Bàng National Park in Vietnam. Found in Karimganj District, Bazaricherra, Assam, India.
Description The shell measures in height and in width.
(Original description) The sinistral shell is ovate-conic, moderately umbilicate, and relatively solid. It consists of 6.75 slightly convex whorls, with a barely discernible peripheral angulation. The upper whorls are white, transitioning to pale lemon on the lower whorls, which are marked by close-set, oblique light green lines. The shell exhibits spiral striations. The outer lip and the columella are pink and expanded, with the lip slightly reflected. The aperture's interior is white.Fulton H.C. (1896). A list of the species of Amphidromus, Albers, with critical notes and descriptions of some hitherto undescribed species and varieties. The Annals and Magazine of Natural History. ser. 6, 17: 66–94, pls 5–7
(Redescription) The shell is medium in size. It exhibits chirality dimorphism, and presents an elongate to ovate conical shape that is rather thin and glossy. The spire appears conical; the apex is acute and light brown, lacking a black spot on its tip. Comprising six to seven nearly smooth whorls, the shell displays a wide and depressed suture, and the body whorl is rounded. The periostracum is usually deciduous, sometimes showing yellowish-green radial streaks that appear more conspicuous on the body whorl and faded on earlier whorls. The body whorl features a thin, whitish subsutural band and may or may not have a reddish-brown spiral band on the periphery, though this band usually does not reach the apertural lip; a varix is absent. The parietal callus is thin and transparent. The aperture is ovate to elongate; the peristome is expanded and not reflected; the lip is usually purplish-pink. The columella is straight, thickened, and purplish-pink. The umbilicus is narrowly opened.
References
Thach N.N. (2017). New shells of Southeast Asia. Sea shells & Land snails. 48HrBooks Company. 128 pp. Thach, N. N. (2018). New shells of South Asia. Seashells-Landsnails-Freshwater Shells. 3 New Genera, 132 New Species & Subspecies. 48HRBooks Company, Akron, Ohio, USA. 173 pp. Thach N.N. (2020). Remarks on Amphidromus reflexilabris Schepman, 1892, Amphidromus roseolabiatus Fulton, 1896, Amphidromus anhduongae Thach, 2020 and correction of errors in “New Shells of South Asia, Volume 2”. The Festivus. 52(4): 359-362.
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