Euthymia colzumensis Jousseaume, 1898

Albano, Paolo G., Franco, Davide Di, Azzarone, Michele, J., Piet A., Bakker & Sabelli, Bruno, 2023, Review of the types of Indo-Pacific Triphoridae (Mollusca, Gastropoda) in the Muséum national d’Histoire naturelle, Paris, Zoosystema 45 (2), pp. 13-106 : 68-70

Euthymia colzumensis Jousseaume, 1898 ( Fig. 43 )

Euthymia colzumensis Jousseaume, 1898: 77 , not illustrated.

ORIGINAL LOCALITIES. — Suez, Djibouti.

TYPE MATERIAL. — Syntypes. Egypt • MNHN-IM-2000-724; 3 specimens; Suez • MNHN-IM-2000-725; 10 specimens; Suez .

ORIGINAL DESCRIPTION. — Testa solida pyramidale-elongata, pallide fulva, spiraliter tricostata, granulae costarum oblongae oppositae seriebus longitudinalibus dispositae; anfr. 13-14 regulariter crescenti, sutura canaliculata separati, primi albi sequentes antice alba postice pallidefulvo zonati, ultimus ad basim attenuatus, costis granulosis quinque rugatus; apertura subrotundata lateraliter fissa; canalis elongatus, retrorsum recurvusatus. Long. 7mm; diam. 1mm 7.

[Latin diagnosis followed by a discussion in French]

TRANSLATION OF THE LATIN TEXT. — Solid and pyramidalelongated shell, light brown, with three spiral cords, the granules of the spiral cords are oblong and arranged in opposed longitudinal series; from 13 to 14 regularly growing whorls, separated by a canaliculated suture, the first whorls are banded with white, subsequent ones are banded with white anteriorly and with light brown posteriorly, the last whorl is attenuated near the base and characterized by five granulated spiral cords; roundish and laterally fissured aperture; elongated siphon, curved backwards. Length 7 mm; diameter 1.7 mm.

DIAGNOSIS. — Shell conical with flat sides. Syntypes 5.0 and 5.4 mm high. Teleoconch of 9 whorls. Three spiral cords present, the second appearing on the third whorl. First and second cords with tubercles at the intersection with rather orthocline ribs. Second cord with thin tubercles becoming large on the lower whorls. Peristome without additional cords. Posterior sinus shallow. Base with two additional spiral cords of which the first with thin tubercles, the other smooth. Multispiral protoconch of four whorls with two spiral keels and axial riblets. Teleoconch with light brown to white tubercles on a brown background; the second and third cords occasionally with a lighter background. Protoconch light brown.

Figures

FIG. 43. — Euthymella colzumensis (Jousseaume, 1898), Suez, Egypt: A-J, syntype 1, MNHN-IM-2000-724: front (A, B), side (C, D), back (E), protoconch (F, G), peristome (H, I), aperture (J); K-M, syntype 1, MNHN-IM-2000-724: apex (K, L), front (M); N, O, original labels of MNHN-IM-2000-724. Scale bars: A-E, M, 1 mm; F, G, K, L, 0.2 mm; H-J, 0.5 mm.