Trigonostoma scala
Shell of Trigonostoma scala (neotype at MNHN, Paris)
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Gastropoda
Subclass:	Caenogastropoda
Order:	Neogastropoda
Family:	Cancellariidae
Genus:	Trigonostoma
Species:	T. scala
Binomial name
Trigonostoma scala (Gmelin, 1791)
Synonyms[1]
Cancellaria costata Sowerby, 1832 (non Sowerby, 1822) Cancellaria rigida G.B. Sowerby I, 1832 Murex scala Gmelin, 1791 Scalptia scala (Gmelin, 1791) Trigonaphera withrowi Petit, 1976

Trigonostoma scala is a species of sea snail, a marine gastropod mollusc in the family Cancellariidae, the nutmeg snails.^[1]

The length of the shell attains 32.5 mm.

This marine species occurs off Senegal.

• Petit R.E. (1976). Notes on Cancellariidae (Mollusca: Gastropoda) - III. Tulane Studies in Geology and Paleontology. 12(1-2): 33–43.
• Bernard, P.A. (Ed.) (1984). Coquillages du Gabon [Shells of Gabon]. Pierre A. Bernard: Libreville, Gabon. 140, 75 plates pp.
• Gofas, S.; Afonso, J.P.; Brandào, M. (Ed.). (S.a.). Conchas e Moluscos de Angola = Coquillages et Mollusques d'Angola. [Shells and molluscs of Angola]. Universidade Agostinho / Elf Aquitaine Angola: Angola. 140 pp.
• Petit, R.E. & Harasewych, M.G. (2005) Catalogue of the superfamily Cancellarioidea Forbes and Hanley, 1851 (Gastropoda: Prosobranchia)- 2nd edition. Zootaxa, 1102, 3–161. NIZT 682
• Petit R.E. (2009) George Brettingham Sowerby, I, II & III: their conchological publications and molluscan taxa. Zootaxa 2189: 1–218.

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• Gmelin, J. F. (1791). Vermes. In: Gmelin J.F. (Ed.) Caroli a Linnaei Systema Naturae per Regna Tria Naturae, Ed. 13. Tome 1(6). G.E. Beer, Lipsiae
• Broderip, W. J. & Sowerby, G. B. I. (1832-1833). (Descriptions of new species of shells from the collection formed by Mr. Cuming on the western coast of South America, and among the islands of the southern Pacific Ocean.). Proceedings of the Committee of Science and correspondence of the Zoological Society of London. Part II for 1832: 25–33
• Sowerby, G. B. I; Sowerby, G. B. II. (1832-1841). The conchological illustrations or, Coloured figures of all the hitherto unfigured recent shells. London, privately published
• Verhecken A. (2007). Revision of the Cancellariidae (Mollusca, Neogastropoda, Cancellarioidea) of the eastern Atlantic (40°N-40°S) and the Mediterranean. Zoosystema, 29(2): 281-364
• Recent Cancellariidae. Annotated and illustrated catalogue of Recent Cancellariidae. Privately published, Wiesbaden. 428 pp. [With amendments and corrections taken from Petit R.E. (2012) A critique of, and errata for, Recent Cancellariidae by Jens Hemmen, 2007. Conchologia Ingrata 9: 1-8