Calliostoma hassler
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Gastropoda
Subclass:	Vetigastropoda
Order:	Trochida
Superfamily:	Trochoidea
Family:	Calliostomatidae
Subfamily:	Calliostomatinae
Genus:	Calliostoma
Species:	C. hassler
Binomial name
Calliostoma hassler Clench & Aguayo, 1939
Synonyms
Calliostoma (Astele) hassler Clench & Aguayo, 1939

Calliostoma hassler, common name Hassler's top shell, is a species of sea snail, a marine gastropod mollusk in the family Calliostomatidae.^[1]

The size of the shell varies between 25 mm and 32 mm.

This section needs expansion. You can help by adding to it. (July 2013)

This species occurs in the Atlantic Ocean off Eastern Brazil at depths between 40 m and 64 m.

• Clench, W. J. and C. G. Aguayo. 1939. Notes and descriptions of new deep-water Mollusca obtained by the Harvard-Havana Expedition off the coast of Cuba. II. Memorias de la Sociedad Cubana de Historia Natural "Felipe Poey" 13: 189–197, pls. 28-29

• Encyclopedia of Life
• ITIS
• World Register of Marine Species
• "Calliostoma hassler". Gastropods.com. Retrieved 15 January 2019.