Alycaeus is a genus of small land snails with a gill and an operculum, terrestrial gastropod mollusks in the family Alycaeidae.MolluscaBase eds. (2020). MolluscaBase. Alycaeus Gray, 1850. Accessed through: World Register of Marine Species at: http://www.marinespecies.org/aphia.php?p=taxdetails&id=996197 on 2020-05-12
Description (Original description) The operculum is horny with multiple whorls. The conical shell has a regular spire. The body whorl is distorted and compressed and significantly contracted before the aperture. The aperture is circular, with a regularly reflexed peristome.Baird W. (1850). Nomenclature of molluscous animals and shells in the collection of the British Museum. Part I. Cyclophoridae. British Museum, London. 69 pp.
The protoconch sculpture is smooth to obliquely striated. The diameter of the shell varies between 8 mm and 15 mm. The central tooth of the radula consists of five broad cusps with the central cusp blunt. source-attribution)
Distribution There are nine recognized species of Alycaeus in Peninsular Malaysia.
Species Species within the genus Alycaeus include: Alycaeus conformis Fulton, 1902 Alycaeus eydouxi Venmans, 1956 Alycaeus gibbosulus Stoliczka, 1872 Alycaeus goliath Páll-Gergely, 2023 Alycaeus himalayae Aravind & Páll-Gergely, 2023 Alycaeus jousseaumei Morgan, 1885 Alycaeus pyramidalis W. H. Benson, 1856 Alycaeus rolfbrandti Maassen, 2006 Alycaeus somwangi Dumrongrojwattana & Maassen, 2008
Taxon inquirendum Alycaeus huberi Thach, 2018 (uncertain: debated synonym)
Synonyms Alycaeus alticola Foon & Liew, 2017: synonym of Stomacosmethis kapayanensis alticola (Foon & T.-S. Liew, 2017) (basionym) Alycaeus altispirus Möllendorff, 1902: synonym of Stomacosmethis altispirus (Möllendorff, 1902) (unaccepted combination) Alycaeus balingensis Tomlin, 1948: synonym of Stomacosmethis balingensis (Tomlin, 1948) (basionym) Alycaeus carinata Maassen, 2006: synonym of Stomacosmethis carinatus (Maassen, 2006) (wrong gender agreement of specific epithet) Alycaeus charasensis Foon & Liew, 2017: synonym of Stomacosmethis kapayanensis charasensis (Foon & T.-S. Liew, 2017) (basionym) Alycaeus clementsi Foon & Liew, 2017: synonym of Stomacosmethis kelantanensis clementsi (Foon & T.-S. Liew, 2017) (basionym) Alycaeus (Dioryx) compactus Bavay & Dautzenberg, 1900: synonym of Dioryx compactus (Bavay & Dautzenberg, 1900) (original combination) Alycaeus costacrassa Foon & Liew, 2017: synonym of Stomacosmethis kapayanensis costacrassa (Foon & T.-S. Liew, 2017) (basionym) Alycaeus expansus Foon & Liew, 2017: synonym of Stomacosmethis kelantanensis expansus (Foon & T.-S. Liew, 2017) (basionym) Alycaeus galbanus Godwin-Austen, 1889: synonym of Stomacosmethis galbanus (Godwin-Austen, 1889) (original combination) Alycaeus globosus Adams, 1870: synonym of Pincerna globosus (H. Adams, 1871) Alycaeus hosei Godwin-Austen, 1889: synonym of Stomacosmethis hosei (Godwin-Austen, 1889) [lycaeus ikanensis Foon & Liew, 2017: synonym of Stomacosmethis kapayanensis ikanensis (Foon & T.-S. Liew, 2017) Alycaeus kapayanensis Morgan, 1885: synonym of Stomacosmethis kapayanensis (de Morgan, 1885) Alycaeus kelantanensis Sykes, 1902: synonym of Stomacosmethis kelantanensis (Sykes, 1902) Alycaeus kurauensis Foon & Liew, 2017: synonym of Stomacosmethis kapayanensis kurauensis (Foon & T.-S. Liew, 2017) Alycaeus liratulus Preston, 1907: synonym of Pincerna liratulus (Preston, 1907) Alycaeus perakensis Crosse, 1879: synonym of Stomacosmethis perakensis (Crosse, 1879) Alycaeus regalis Foon & Liew, 2017: synonym of Stomacosmethis regalis (Foon & T.-S. Liew, 2017) Alycaues roebeleni Möllendorff, 1894: synonym of Stomacosmethis roebeleni (Möllendorff, 1894) Alycaeus selangoriensis Foon & Liew, 2017: synonym of Stomacosmethis kapayanensis selangoriensis (Foon & T.-S. Liew, 2017) Alycaeus senyumensis Foon & Liew, 2017: synonym of Stomacosmethis senyumensis (Foon & T.-S. Liew, 2017) Alycaeus thieroti Morgan, 1885: synonym of Pincerna thieroti (de Morgan, 1885) Alycaeus virgogravida Foon & Liew, 2017: synonym of Stomacosmethis kapayanensis virgogravida (Foon & T.-S. Liew, 2017)
References
vi:Alycaeus balingensis