# Tectus

Tectus is a genus of sea snails, marine gastropod mollusks in the family Tegulidae.

## Description

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)