Tectus

The shell has a pyramidal shape. Its base is flat, without false-umbilicus. The rhomboidal aperture is very oblique, angular, and wider than long. The outer lip is lirate within. The 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 (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==