Stacked from 43 images. Method=B (R=8,S=4)
Species ID
OC-SP-0002204
Discovered
Phylum
Mollusca
Species ID
OC-SP-0002204
Provisional Species Name
Mitrella sp_MNHN_IM_2000_40378
Lowest Valid Taxon Name in WoRMS
Mitrella
Lowest Known Rank
Genus
Status
Discovered
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Kingdom
Animalia
Phylum
Mollusca
Class
Gastropoda
Order
Neogastropoda
Family
Columbellidae
Genus
Mitrella
Date Identified
20/01/2026
Taxonomic Remarks
This species is closest to Mitrella cyanae Monsecour & Monsecour, 2016 from the far south of New Caledonia. It differs by its smaller size, smaller protoconch, more elongate shell, less rounded whorls, absence of spiral cords and the more narrow aperture. Mitrella arcta is smaller, has more straight whorls and a narrower aperture with different denticulation.
Received All Minimal Data for Discovery
26/02/2026
Description of Material
Shell of moderate size for the genus, adult size up to 11.5 mm; fusifom, elongate. First whorls rather straight, later whorls slightly rounded. Suture slightly impressed. Protoconch paucispiral, consisting of about 1.6-1.7 smooth whorls. Transition to teleoconch very weak. Teleoconch consisting of about 5.3 whorls. Axial sculpture absent. Spiral sculpture absent, apart from the basal cords. The abapical most are very strong and clearly present. These strong cords reach to about the adapical end of the columella. More adapical of these strong cords, there are five weak close set extra cords, which reach to about halfway the parietal callus. Aperture average width for the genus, about 44% of shell height. Outside of outer lip with a thickened axial rib, with the continuation of the basal cords on the abapical end. Inside of outer lip without a clear sinus and with 7 strong denticles. Second and third most abapical less strong and very close to each other. Columellar callus thick, not raised, with a thickened rim with 4 denticles, adapical most stronger. Parietal callus clearly present. Siphonal canal short, open, slightly recurved. Teleoconch whorls whitish with beige irregular markings.. Aperture and columella white. Protoconch slightly translucent white. Height of holotype: 11.5 mm
Ecology
Direct developing species with paucispiral protoconch, so non planctotrophic larvae. Most likely endemic.
Distribution
MNHN Spanbios expedition: New Caledonia, Koumac, stn DW5144, 20°41,2’S, 164°11,5’E, 352-386m (holotype)
Stacked from 43 images. Method=B (R=8,S=4)
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