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Epitoniidae Berry, 1910 (1812)

Epitonium adjunctum

(Jousseaume, 1912)

Description:

Dimensions range from 8 mm high.


Shell: conical; solid, rather solid; small. Exterior colour milky white, glossy. About 9 whorls; protoconch with ~3 whorls smooth; teleoconch with 5-6 whorls rounded, slightly depressed near the suture. Suture deep, fenestrated. Imperforate. Approximately 9 - 10 costae on the body whorl. Costae are thin, erect, slightly angular at the posterior. Costae joined across the suture. Columella ribs fuse with the columellar edge. Aperture round; peristome very thick,with a small spine-like projection at the suture.


Distribution:

Red Sea to Aden [Brown & Neville, 2015: 33].


Habitat:

not reported [Brown & Neville, 2015: 33].


Etymology:

[latin] from adjunctus = joined or attached, possible reference to the costae being joined across the suture.


Type Material:

Syntype: MNHN-IM-2000-4199 [as Turbiniscala adjuncta Jousseaume, 1912] - Type Locality: Périm, Aden (Mer Rouge). [Muséum national d'Histoire naturelle, 2026: MNHN-IM-2000-4199]


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Jousseaume, F. (1912). Plate VI. Fig. 31-32.

Distribution

as listed in source literature

Jousseaume, F. (1912).
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Plate VI. Fig. 31-32.
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pp: 201-202.
Kaicher, S.D. (1980).
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Card #: EP2-3123
Muséum national d'Histoire naturelle (2026).
Shown in text as Turbiniscala adjuncta Jousseaume, 1912
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Fig. MNHN-IM-2000-4199.
Turbiniscala adjuncta Jousseaume, 1912
Syntype Set of 2 specimens MNHN-IM-2000-4199
Périm, Aden (Mer Rouge)
Credit:MNHN - Manuel CABALLER - 2018
Project:RECOLNAT (ANR-11-INBS-0004)
CC BY 4.0

Synonymy:

Turbiniscala adjuncta Jousseaume, 1912 [Brown & Neville, 2015: 33; Jousseaume, 1912: 201; Muséum national d'Histoire naturelle, 2026: MNHN-IM-2000-4199]


Source Literature:

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]
Jousseaume, F. (1912). Faune malacologique de la Mer Rouge. Scalidae. Mémoires de la Société Zoologique de France.. 24(3-4). Mémoires de la Société Zoologique de France.. https://www.biodiversitylibrary.org/page/10095979 [Accessed 1 March 2025]
Kaicher, S.D. (1980). Epitoniidae I [Pack 23]. S. D. Kaicher, St. Petersburg, Florida. http://www.femorale.com/kaicher/species.asp?f=Epitoniidae&c=125 [Accessed 8 May 2023]
Muséum national d'Histoire naturelle (2026). Mollusca (IM) collection. Muséum national d'Histoire naturelle. https://science.mnhn.fr/institution/mnhn/collection/im/item/search [Accessed 18 July 2026]
Weil, A., Brown, L. & Neville, B. (1999). The Wentletrap Book. Evolver
WoRMS Editorial Board (2025). World Register of Marine Species. https://www.marinespecies.org at VLIZ. [Accessed 8 November 2025]

WoRMS direct page link: Open WoRMS record