Euthymia regalis Jousseaume, 1884

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 : 91-93

Euthymia regalis Jousseaume, 1884 ( Fig. 62 )

Euthymia regalis Jousseaume, 1884: 265 , pl. 4, fig. 18.

TYPE LOCALITY. — New Caledonia.

TYPE MATERIAL. — Syntype. New Caledonia • MNHN-IM-2000-1133; 1 specimen; from type locality.

ORIGINAL DESCRIPTION. — Testa solida, alba, quandoque rarius rufo-maculata, elongato-turrita, subcylindrica, apice breviter et parum attenuata; spiraliter costata et striata; apice truncato; anfractibus persistentibus 12, convexiusculis, lente crescentibus, sutura vix impressa separatis; ultimo carinato, infra planulato, costis quinque filiformibus cincto; apertura subrotundata, ad suturam emarginata; canali brevi, recurvo. — Long. 11, lat. 4 millim.

[Latin diagnosis followed by a discussion in French]

TRANSLATION OF THE LATIN TEXT. — Solid shell, sometimes with sparse red spots, turreted-elongated, subcylindrical, short and slightly slender apex; spirally ribbed and striated; truncated apex; whorls are always 12, slightly convex, slowly growing, separated by a slightly impressed suture; carinated last whorl, flattened below, with five filiform spiral cords; roundish aperture, bordered with the suture; short and curved siphon. — Length 11, diameter 4 mm.

DIAGNOSIS. — Shell cyrtoconoid with flat sides. Syntype 10.0 mm high. Teleoconch of c. 10 whorls. Three spiral cords present of which the first one weaker and the third more prominent. Spiral cords with very elongated tubercles at the intersection with rather orthocline axial ribs. A fine spiral thread present suprasuturally. Spiral microsculpture of fine threads. Peristome with additional cords below the first and second spiral cord, but not sufficiently complete in the syntype to judge the extent of the posterior sinus. Base with two additional cords of which the first weakly tubercled and the second smooth. Teleoconch white.

Figures

FIG. 62. — Euthymia regalis Jousseaume, 1884, New Caledonia: A, original figure in Jousseaume (1884); B-F, I, syntype, MNHN-IM-2000-1133; front (B), side (C), back (D), peristome (E, F), microsculpture (I). G, H, J, K, original labels. Scale bars: A-F, 1 mm; I, 0.4 mm.