Onustus is a genus of large sea snails, marine gastropod mollusks in the family Xenophoridae, the carrier shells.
Description Shells medium-sized to large (diameter of base without attachments 80–160 mm; height of shell 42–100 mm), thin-shelled, with wide peripheral flange, simple or weakly digitate, porcellanous ventrally. Umbilicus narrow to wide, sometimes plugged with callus. Foreign objects attached to periphery on few to all whorls, usually small and inconspicuous, leaving most of the shell surface exposed.Kreipl, K. & Alf, A. (1999): Recent Xenophoridae. 148 pp. incl. 28 color plts. ConchBooks, Hackenheim, .
Species Species within the genus Onustus include: Onustus aquitanus Simone & C. Cunha, 2012 † Onustus borsoni (Sismonda, 1847) Onustus caribaeus (Petit de la Saussaye, 1857) Onustus exutus (Reeve, 1842) Onustus indicus (Gmelin, 1791) Onustus longleyi Bartsch, 1931 † Onustus undosus Raven, 2021 Synonyms Onustus flindersi Cotton & Godfrey, 1938: synonym of Xenophora flindersi (Cotton & Godfrey, 1938) (original combination) Onustus javanicus Gray, 1850: synonym of Xenophora solarioides (Reeve, 1845) Onustus peronianus Iredale, 1929: synonym of Xenophora peroniana (Iredale, 1929) (original combination) † Onustus prognatus Finlay, 1926: synonym of † Xenophora prognata (Finlay, 1926)
References
Kreipl K. & Alf A. (1999). Recent Xenophoridae. Conchbooks, Hackenheim > Germany. 148pp
External links
Swainson, W. (1840). A treatise on malacology; or the natural classification of shells and shell-fish. Longman, London, viii + 419 pp Sacco, F. (1896) I molluschi dei terreni terziarii del Piemonte e della Liguria. Parte XX. (Caecidae, Vermetidae, Siliquariidae, Phoridae, Calyptraeidae, Capulidae, Hipponycidae [sic], Neritidae e Neritopsidae). Carlo Clausen, Torino, 66 pp., 5 pls] Fischer, P. (1873-1879). (continuation of Kiener) Spécies général et iconographie des coquilles vivantes. Volume 10, Famille des Turbinacées. Genre Turbo (Turbo), pp. i-iv + 1-128 (1873), pls 1, 28, 44-49, 53-54, 57-120. Volume 11, Genres Troque (Trochus, including Calcar), pp. 1-96, pls 37-86 (1875); 97-144 (1876); 145-240 (1877); 241-336 (1878); 337-423, Xenophora pp. 424-450, Tectarius pp. 451-459, Risella pp. 460-463, Index 464-480 (1879) Ponder W.F. (1983). A revision of the Recent Xenophoridae of the World and of the Australian Fossil Species (Mollusca : Gastropoda). Memoir 17. The Australian Museum Sydney, Australia.