Streptaxis is a genus of air-breathing land snails, terrestrial pulmonate gastropod mollusks in the family Streptaxidae.
Description
The oval shell has a heliciform shape, but is often oblique. It is profoundly umbilicated, ridged, striate above, smooth and usually polished below. The last whorls are usually deviating more or less from the original axis. The aperture is lunar, with or without teeth. The outer lip slightly thickened and reflected.
The animal has a very long neck and short tail. The superior tentacles are narrow and long. The labial palpi are narrow, as long as the inferior tentacles. The genital orifice is on the right side, distant from the superior tentacle, and closer to the respiratory orifice. The radula is similar to that of Glandina; the central tooth is simple.
Distribution
The distribution of the genus Streptaxis includes: Brazil Colombia Venezuela
Species
Species within the genus Streptaxis include: † Streptaxis alminoaffonsicum (Maury, 1934) Streptaxis blanfordianus Theobald, 1865 Streptaxis bombax Benson, 1859 Streptaxis borealis Heude, 1882 (taxon inquirendum) Streptaxis candei Petit de la Saussaye, 1842 Streptaxis capillosus Pilsbry, 1897 Streptaxis contusus (Férussac, 1821) Streptaxis cumingianus Pfeiffer, 1849 Streptaxis crossei L. Pfeiffer, 1867 Streptaxis cypsele (L. Pfeiffer, 1849) Streptaxis daflaensis Godwin-Austen, 1876 Streptaxis decussatus Pilsbry, 1897 Streptaxis deflexus Souleyet, 1852 Streptaxis dejectus (S.A.A. Petit De La Saussaye, 1842) Streptaxis deplanatus Pfeiffer, 1845 Streptaxis distortus Jonas, 1843 Streptaxis dunkeri Pfeiffer, 1845 Streptaxis exacutus Gould, 1856 (taxon inquirendum) Streptaxis fortunei Pfeiffer, 1854 Streptaxis helios Pilsbry, 1897 Streptaxis hylephilus (d'Orbigny, 1837) Streptaxis gibbonsi (Taylor, 1877) Streptaxis gibbosus Pfeiffer, 1859 Streptaxis hanleyanus Stoliczka, 1871 (taxon inquirendum) Streptaxis iguapensis Pilsbry, 1930 Streptaxis iheringi Thiele, 1827 Streptaxis intermedius Albers, 1857 Streptaxis laevissimus (S. Moricand, 1836) Streptaxis leirae Salvador, 2018 Streptaxis lutzelburgi Weber, 1925 Streptaxis megahelix Salvador, 2018 Streptaxis michaui Crosse & Fischer, 1863 Streptaxis mirificus Möllendorff, 1894 (taxon inquirendum) Streptaxis obtusus Stoliczka, 1871 (taxon inquirendum) Streptaxis orientalis Heude, 1885 (taxon inquirendum) Streptaxis ovatus Pfeiffer, 1845 Streptaxis petiti Gould, 1844 Streptaxis pfeifferi (Pilsbry, 1930) Streptaxis pilsbryi (Solem, 1956) Streptaxis piquetensis (Pilsbry, 1930) Streptaxis politus (Fulton, 1899) Streptaxis rollandii (Bernardi, 1857) Streptaxis sankeyi Benson, 1859 (synonym: Streptaxis sankeyanus Stoliczka, 1871 - taxon inquirendum) Streptaxis saopaulensis Pilsbry, 1930 Streptaxis sinuosus Pfeiffer, 1861 Streptaxis solidulus Stoliczka, 1871 (taxon inquirendum) Streptaxis subregularis Pfeiffer, 1846 Streptaxis suturalis Weinland & Martens, 1859 (taxon inquirednum) Streptaxis thebawi Godwin-Austen, 1888 (taxon inquirendum) Streptaxis tumulus Pilsbry, 1897 Streptaxis uberiformis Pfeiffer, 1848