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Epitoniidae Berry, 1910 (1812)

Cycloscala revoluta

(Hedley, 1899)

Description:

Dimensions range from 3 mm - 8 mm high and 1.5 mm - 4 mm wide.
Width to height ratio: 0.5:1 ~ 0.5:1

Shell: narrowly to widely scalariform; microscopic to small. Exterior colour translucently white. About 8 whorls; rather thin; protoconch with 4-5 whorls smooth coiled, in contact; teleoconch with ~3 whorls. Spire strongly uncoiled from the first teleoconch whorl. Approximately 8 costae on the body whorl. Costae are erect, fluted. Costae with a blunt coronation on the shoulder. Intercostal spaces smooth and glossy. Aperture circular; peristome complete; outer lip reflexed.

The slender, strongly uncoiled whorls separate this shell from E hyalina. Hedley, 1899 also mentions that this species has more numerous and serrate varices than E. hyalina.


Distribution:

Hawaii, Marshall Islands, Loyalty Islands, New Caledonia, Japan, Philippines, Red Sea (García 2004: 64)


Habitat:

5 -100m


Type Material:

Holotype: AMS C.5872 for Cycloscala revoluta (Hedley, 1899) - Type Locality: the lagoon beach, Funafuti Atoll.. [Brown, L. & Neville, B.D., 2015]
Holotype: ZMB 103079 [as Scalaria latedisjuncta de Boury, 1911] - Type Locality: Lifou, Loyalty Islands.. [Brown, L. & Neville, B.D., 2015]


SpeciesImage

Hedley, C. (1899). pp: 414. Fig. 7.

Distribution

as listed in source literature

Hedley, C. (1899).
Species Image
pp: 414. Fig. 7.
Species Image
pp: 414.
Boury, E. de. (1911a).
Shown in text as Scalaria latedisjuncta de Boury, 1911
Species Image
pp: 330.
Scalaria (Cycloscala) latedisjuncta de Boury, new species.
Shell small, very thin, very fragile, glossy, polished, translucent, white, faintly milky, narrow, umbilicate, conical, very elongate; whorls very widely and strongly disjunct, ornamented with elegantly lobed longitudinal costae.
The suturecË
Nakayama, T. (2003).
Species Image
pp: 141. Plate 19. Fig. 9-10.
figs 9-10:
Cycloscala revoluta (Hedley, 1899)
height 8.0 mm; breadth 4.0 mm (WMNH-Mo-Na384)
Garcia, E.F. (2004b).
Species Image
pp: 65. Fig. 31.
Cycloscala revoluta (Hedley, 1899), Loyalty Islands, Lifou, Baie du Santal. 31. 20°55.6
Species Image
pp: 66. Fig. 38.
Scalaria latedisjuncta de Boury, 1911
Hololotype ZMB Moll. 103.079.
arsint.com (2023).
Species Image
Cycloscala revoluta

Synonymy:

Scalaria latedisjuncta de Boury, 1911 [in Boury, E. de., 1911a].
Scalaria latedisjuncta de Boury, 1911 [in Brown, L. & Neville, B.D., 2015].


Source Literature:

arsint.com (2023). Shells for Sale:Epitonidae. arsint.com. http://www.arsint.com/seashells_epitoniidae_opalia.html [Accessed 21 October 2023]
Boury, E. de. (1911a). Diagnoses de Scalariidae nouveaux appartenant aux sous-genre Cycloscala et Nodiscala.. Bulletin du Muséum national d'Histoire naturelle.. 17(5). https://www.biodiversitylibrary.org/page/34198378 [Accessed 30 December 2025]
Brown, L. & Neville, B.D. (2015). Catalog of the recent taxa of the families Epitoniidae and Nystiellidae (Mollusca: Gastropoda) with a bibliography of the descriptive and systematic literature. Zootaxa. 3907(1). Magnolia Press Auckland, New Zealand. http://dx.doi.org/10.11646/zootaxa.3907.1.1 [Accessed 22 October 2023]
Garcia, E.F. (2004b). On the genus Cycloscala Dall, 1889 (Gastropoda: Epitoniidae) in the Indo-Pacific, with comments on the type species, new records of known species, and the description of three new species. Novapex: Trimestriel de la Société belge de malacologie. 5(2-3). https://www.biodiversitylibrary.org/part/93162 [Accessed 10 June 2025]
Hedley, C. (1899). XVII. The Mollusca of Funafuti. Part I. Gasteropoda. The Australian Museum Memoir. 3(7). https://doi.org/10.3853/j.0067-1967.3.1899.503 [Accessed 10 June 2025]
Nakayama, T. (2003). A Review of Northwest Pacific Epitoniids. Monographs of Marine Mollusca. 6. Backhuys Publishers
WoRMS Editorial Board (2025). World Register of Marine Species. https://www.marinespecies.org [Accessed 8 November 2025]

WoRMS direct page link: Open WoRMS record