Thapsia (gastropod)
Thapsia is a genus of air-breathing land snails, terrestrial pulmonate gastropod molluscs in the subfamily Sheldoniinae of the family Urocyclidae.
Distribution
Species in this genus are found in tropical western Africa, from Senegal to Gabon.Description
Species attributed to the genus Thapsia sensu lato have shell diameters ranging from about 15 to 30 mm, with 5½-6½ whorls. These rather featureless dextral shells are characterized by a low spire and their yellow to brown color. The spiral sculpture of the postembryonic shell is slender. In some larger * The sculpture of the radial ribs is formed crosswise or beadlike. The foot shows a long caudal horn.Species
Thapsia was originally designated in 1860 by German zoologist Johann Christian Albers as a subgenus of Nanina Gray, 1834, non Risso, 1826.This genus is a heterogeneous assemblage. Because the shell characters of this genus converge with those of the larger specimens of some closely related genera, the delimitation of * To Thapsia s.l. is difficult. There very few papers that describe the anatomical features of this genus.
Thapsia contains the following species:Thapsia abyssinica Thapsia aranea Thapsia bartaensis Thapsia buchholzi Bourguignat, 1885Thapsia buraensis Verdcourt, 1982Thapsia cavernicola d'Ailly, 1910Thapsia cinnamomeozonata Pilsbry, 1919Thapsia columellarisThapsia consobrina Thapsia consueta Thapsia conuloidea Preston, 1911Thapsia curvatula E. von Martens, 1897Thapsia decepta E. A. Smith, 1899Thapsia densesculpta Thapsia depressior Thapsia ebimimbangana Winter, 2008Thapsia elgonensis Thapsia eminiana Thapsia eremias Thapsia eucosmia Pilsbry, 1919Thapsia exasperata Preston, 1910Thapsia gereti Preston, 1910Thapsia glomus Thapsia grandis Verdcourt, 1982Thapsia hanningtoni Thapsia inclinans Thapsia indecorata Thapsia inflata Thapsia innocens Preston, 1910Thapsia insimulans E. A. Smith, 1899Thapsia insulsa Preston, 1910Thapsia iridescens Thapsia kampalaensis Thapsia karamwegasensis Germain, 1923Thapsia kibonotoensis d'Ailly, 1910Thapsia kigeziensis Thapsia lasti Thapsia leroyi Grandidier, 1887Thapsia magna Thiele, 1933Thapsia majendooensis Thapsia marsabitensis Thapsia masakaensis Thapsia masukuensis E. A. Smith, 1899Thapsia microleuca Verdcourt, 1982Thapsia microsculpta Verdcourt, 1982Thapsia millestriata Thapsia mime Thapsia mukandaensis Thapsia mukulensis Pilsbry, 1919Thapsia multistriata Thapsia nemorum Thapsia nyikana E. A. Smith, 1899Thapsia oleosa Thapsia oscitans Connolly, 1925Thapsia pallidior Thapsia paucispirata Thiele, 1933Thapsia pinguis Thapsia pompholyx Pilsbry, 1919Thapsia punctata Thiele, 1933Thapsia radiata d'Ailly, 1910Thapsia rosenbergi Preston, 1909Thapsia rufescens Pilsbry, 1919Thapsia rufocincta Thapsia rutshuruensis Pilsbry, 1919
- † Thapsia senutae Pickford, 2019 Thapsia silvaepluviosae d'Ailly, 1910Thapsia simulata E. A. Smith, 1899Thapsia snelli Connolly, 1925Thapsia stanleyvillensis Pilsbry, 1919Thapsia submixta Germain, 1935Thapsia tribulationis Thapsia tricolor Thapsia troglodytes - the type species, originally described as Helix troglodytes Morelet, 1848Thapsia uluguruensis Verdcourt, 1982Thapsia unguinosa Pollonera, 1898Thapsia urguessensis Thapsia usambarensis Verdcourt, 1982Thapsia usitata Thapsia vernhouti Thapsia vestii Thapsia wieringai de Winter, 2008Thapsia woodhousei Thapsia yalaensis Germain, 1923Thapsia zambiensis Pilsbry, 1919