Description
The shell has a pyramidal shape. Its base is flat, without false-umbilicus. The rhomboidal Aperture (mollusc), aperture is very oblique, angular, and wider than long. The outer Lip (gastropod), lip is lirate within. The Columella (gastropod), columella is very short, vertical, with a strong spiral fold, ending anteriorly in a knob or point.Distribution
This marine genus has a wide distribution. It occurs in the Persian Gulf, the Red Sea, in the Central and East Indian Ocean and off East Africa, Oceania, Indo-China, Indo-Malaysia, the Philippines, East India, Australia (New South Wales, Northern Territory, Queensland, Western Australia), Kermadec Islands, New Caledonia, Anadaman Islands.Species
Species within the genus ''Tectus'' include: * † ''Tectus altavillensis'' (Defrance, 1828) * ''Tectus architectonicus'' A. Adams, 1853 * † ''Tectus athenasi'' (Vasseur, 1882) * † ''Tectus aulacophorus'' (Cossmann & Pissarro, 1905) * † ''Tectus bareti'' (Vasseur, 1882) * † ''Tectus bourdoti'' (Cossmann & Pissarro, 1902) * † ''Tectus branderi'' (Defrance, 1828) * † ''Tectus britannus'' (Vasseur, 1882) * † ''Tectus chavani'' Glibert, 1962 * † ''Tectus chenui'' Le Renard, 1994 * † ''Tectus cognatus'' (J. de C. Sowerby, 1840) * † ''Tectus crenularis'' (Lamarck, 1804) * ''Tectus dentatus, Tectus (Tectus) dentatus'' (Forskål in Niebuhr, 1775) * † ''Tectus extraconicus'' Gain, Belliard & Le Renard, 2019 * ''Tectus fabrei'' (Montrouzier in Fischer, 1878) * ''Tectus fenestratus'' (Gmelin, 1791) * † ''Tectus fluctus'' Gain, Belliard & Le Renard, 2019 * † ''Tectus fredevillensis'' Gain, Belliard & Le Renard, 2019 * † ''Tectus funiculosus'' (Deshayes, 1832) * † ''Tectus gabrielis'' (d'Orbigny, 1850) * † ''Tectus gervillii'' Gain, Belliard & Le Renard, 2019 * † ''Tectus leae'' Gain, Belliard & Le Renard, 2019 * † ''Tectus margaritaceus'' (Deshayes, 1832) * ''Tectus mauritianus'' (Gmelin, 1791) * † ''Tectus monilifer'' (Lamarck, 1804) * † ''Tectus montissanctipetri'' (Binkhorst, 1861) * † ''Tectus morgani'' (Cossmann & Pissarro, 1905) * ''Tectus noduliferus' (Lamarck, 1822) * † ''Tectus ornatus'' (Lamarck, 1804) * † ''Tectus planibasis'' Gain, Belliard & Le Renard, 2019 * ''Tectus pyramis'' (Born, 1778) * † ''Tectus richardi'' Gain, Belliard & Le Renard, 2019 * ''Tectus royanus'' (Iredale, 1912) * † ''Tectus spinalis'' Gain, Belliard & Le Renard, 2019 * † ''Tectus subcanaliculatus'' (Deshayes, 1863) * † ''Tectus torticostulus'' Gain, Belliard & Le Renard, 2019 * ''Tectus triserialis'' (Lamarck, 1822) ;Species brought into synonymy : * ''Tectus concavus'' (Gmelin, 1791): synonym of ''Infundibulum concavum'' (Gmelin, 1791) * ''Tectus conus'' (Gmelin, 1791): synonym of ''Rochia conus'' (Gmelin, 1791) * ''Tectus elatus'' (Lamarck, 1822): synonym of ''Rochia elata'' (Lamarck, 1822) * ''Tectus magnificus'' Poppe, 2004: synonym of ''Rochia magnifica'' (Poppe, 2004) * ''Tectus maximus'' (Koch in Philippi, 1844): synonym of ''Rochia maxima'' (Koch, 1844) * ''Tectus niloticus'' (Linnaeus, 1767): synonym of ''Rochia nilotica'' (Linnaeus, 1767) * ''Tectus pagodalis'' Montfort, 1810: synonym of ''Tectus mauritianus'' (Gmelin, 1791) * ''Tectus tentorium'' (Gmelin, 1791): synonym of ''Trochus tentorium'' Gmelin, 1791 * ''Tectus tabidus'' Reeve, L.A., 1861: synonym of ''Tectus pyramis'' (Born, 1778) * ''Tectus virgatus'' (Gmelin, 1791): synonym of ''Rochia virgata'' (Gmelin, 1791)References
* Vaught, K.C. (1989). ''A classification of the living Mollusca''. American Malacologists: Melbourne, FL (USA). . XII, 195 pp * Williams S.T., Karube S. & Ozawa T. (2008) ''Molecular systematics of Vetigastropoda: Trochidae, Turbinidae and Trochoidea redefined''. Zoologica Scripta 37: 483–506External links