Epitonium perimense

(Jousseaume, 1912)

Description:

Dimensions range from 5 mm - 5 mm high and 2 mm wide.
Width to height ratio: 0.4:1 ~ 0.4:1

Shell: elongated, conical shape has an oblique base; fairly solid, though occasionally thin; minute. Exterior colour white with a pale brown median band, this band is unstable and quickly fades on dead shells. About 9 whorls; protoconch with ~3 whorls smooth and horn-colored; teleoconch with 5-6 whorls. Suture deep. Umbilicate: umbilical slit that is partially obstructed by the columellar. Approximately 16 - 18 costae on the body whorl. Costae are slightly oblique, meeting at the suture roughly ribbed, membranous, barely prominent on the early whorls, increasing rapidly in size becoming thicker and rougher near the peristome. Costae forming longitudinal series, which sometimes lack regularity; Intercostal spaces No transverse striae are visible. Aperture obliquely oval; peristome thick peristome, which becomes thinner at the final whorl.

Distribution:

Aden, Périm, Djibouti, Suez

Habitat:

not listed

Etymology:

in relation to Perim, small volcanic island in the Bab el-Mandeb strait between Yemen and Djibouti where the shell was first collected

Type Material:

Syntype: Paris Museum for Epitonium perimense (Jousseaume, 1912). [Kaicher, S.D., 1980]

Kaicher, S.D. (1980).

Syntype: MNHN Paris Museum

Distribution

as listed in source literature

Jousseaume, F. (1912).

Plate VI. Fig. 43.

Labeoscala perimensis
PI. VI, fig. 43. PI. VII, fig. 7-8.

Plate VII. Fig. 7-8.

Labeoscala perimensis
PI. VI, fig. 43. PI. VII, fig. 7-8.

pp: 214.

Kaicher, S.D. (1980).

Syntype: MNHN Paris Museum

Source Literature:

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]
Weil, A., Brown, L. & Neville, B. (1999). The Wentletrap Book. Evolver
WoRMS Editorial Board (2025). World Register of Marine Species. https://www.marinespecies.org [Accessed 8 November 2025]

WoRMS direct page link: Open WoRMS record

Epitonium perimense

(Jousseaume, 1912)

Description:

Distribution:

Aden, Périm, Djibouti, Suez

Habitat:

not listed

Etymology:

in relation to Perim, small volcanic island in the Bab el-Mandeb strait between Yemen and Djibouti where the shell was first collected

Type Material:

Syntype: Paris Museum for Epitonium perimense (Jousseaume, 1912). [Kaicher, S.D., 1980]

Distribution

Jousseaume, F. (1912).

Plate VI. Fig. 43.

Labeoscala perimensis PI. VI, fig. 43. PI. VII, fig. 7-8.

Plate VII. Fig. 7-8.

Labeoscala perimensis PI. VI, fig. 43. PI. VII, fig. 7-8.

pp: 214.

Kaicher, S.D. (1980).

Syntype: MNHN Paris Museum

Source Literature:

WoRMS direct page link: Open WoRMS record

Labeoscala perimensis
PI. VI, fig. 43. PI. VII, fig. 7-8.

Labeoscala perimensis
PI. VI, fig. 43. PI. VII, fig. 7-8.