# Trigonostoma

Trigonostoma is a genus of sea snails, marine gastropod mollusks in the family Cancellariidae, the nutmeg snails.
Trigonostoma is also the name given to a trematode genus in the family Aspidogastridae, that is actually a synonym of the genus Multicalyx Faust & Tang, 1936

## Species

According to the World Register of Marine Species (WoRMS) the following species with valid names are included within the genus Trigonostoma :
* † Trigonostoma ampullaceum (Brocchi, 1814)
* Trigonostoma antiquatum (Hinds, 1843) - antique nutmeg
* † Trigonostoma barnardi A. W. Janssen, 1984
* Trigonostoma breve (G.B. Sowerby I, 1832a)
* Trigonostoma bullatum (G.B. Sowerby I, 1832a) - bubble nutmeg
* Trigonostoma chui Yen, 1936
* Trigonostoma diamantinum Garrard, 1975
* Trigonostoma elegantulum (M. Smith, 1947) little elegant nutmeg
* † Trigonostoma exampullaceum (Sacco, 1894)
* † Trigonostoma exgeslini (Sacco, 1894)
* † Trigonostoma extractrix (Boettger, 1906)
* Trigonostoma gofasi Verhecken, 2007
* Trigonostoma goniostoma (G.B. Sowerby I, 1832a) - angle-mouth nutmeg
* Trigonostoma iota Garrard, 1975
* Trigonostoma kilburni Petit & Harasewych, 2000
* Trigonostoma lamberti (Souverbie, 1870 in Souverbie & Montrouzier)
* Trigonostoma laseroni (Iredale, 1936) - Laseron's nutmeg
* † Trigonostoma lindeni A. W. Janssen, 1984
* Trigonostoma milleri (Burch, 1949) - Miller's nutmeg
* Trigonostoma mozambicense Petit & Harasewych, 2002
* Trigonostoma nitidum (A. Adams, 1855)
* † Trigonostoma parvotriangula Sacco, 1894
* † Trigonostoma protrigonostoma (Sacco, 1894)
* † Trigonostoma pseudumbilicare Peyrot, 1928
* Trigonostoma pygmaeum (C.B. Adams, 1852)
* Trigonostoma rugosum (Lamarck, 1822)
* Trigonostoma scala (Gmelin, 1791)
* Trigonostoma scalare (Gmelin, 1791)
* † Trigonostoma schroeckingeri (R. Hoernes & Auinger, 1890)
* Trigonostoma semidisjunctum (G.B. Sowerby II, 1849a) - disjunct nutmeg
* † Trigonostoma subsuturale (d'Orbigny, 1852)
* Trigonostoma tenerum (Philippi, 1848) - Philippi's nutmeg
* Trigonostoma tessella Garrard, 1975
* Trigonostoma thysthlon Petit & Harasewych, 1987
* Trigonostoma tryblium Bouchet & Petit, 2008
* Trigonostoma tuberculosum (G.B. Sowerby I, 1832a)
* † Trigonostoma umbilicare (Brocchi, 1814)

### Subgenus Trigonostoma Blainville, 1825

* Trigonostoma pellucida - triangular nutmeg

### Species brought into synonymy

* Trigonostoma bicolor (Hinds, 1843) : synonym of Scalptia bicolor (Hinds, 1843)
* Trigonostoma campbelli Shasky, 1961 accepted as Axelella campbelli (Shasky, 1961)
* † Trigonostoma christiei Finlay, 1924 accepted as † Scalptia christiei (Finlay, 1924)
* Trigonostoma costiferum (G.B. Sowerby I, 1832): synonym of Scalptia costifera (G. B. Sowerby I, 1832)
* Trigonostoma damasoi T. Cossignani, 2015 accepted as Trigonostoma gofasi Verhecken, 2007
* Trigonostoma foveolata [sic]: synonym of Scalptia foveolata (G.B. Sowerby II, 1849)
* Trigonostoma rugosum (Lamarck, 1822) accepted as Bivetopsia rugosa (Lamarck, 1822)
* Trigonostoma scalariformis (Lamarck, 1822) accepted as Scalptia scalariformis (Lamarck, 1822)
* Trigonostoma semidisjuncta [sic]: synonym of Trigonostoma semidisjunctum (G.B. Sowerby II, 1849)
* † Trigonostoma thisbe Olsson, 1964 accepted as † Ventrilia thisbe (Olsson, 1964)
* † Trigonostoma triumpha Olsson, 1964 accepted as † Ventrilia triumpha (Olsson, 1964)
* Trigonostoma tuberculosa [sic]: synonym of Trigonostoma tuberculosum (G.B. Sowerby I, 1832)
* Trigonostoma vinnulum Iredale, 1925: synonym of Trigonaphera vinnulum (Iredale, 1925) (original combination)
* † Trigonostoma waikaiaensis Finlay, 1924 accepted as † Scalptia waikaiaensis (Finlay, 1924)