Stacked from 29 images. Method=B (R=8,S=4)
Stacked from 20 images. Method=B (R=8,S=4)
Species ID
OC-SP-0002583
Discovered
Phylum
Mollusca
Species ID
OC-SP-0002583
Provisional Species Name
Retizafra sp_MNHN_IM_2000_40353
Lowest Valid Taxon Name in WoRMS
Retizafra
Lowest Known Rank
Genus
Status
Discovered
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Embargo
No
Kingdom
Animalia
Phylum
Mollusca
Class
Gastropoda
Order
Neogastropoda
Family
Columbellidae
Genus
Retizafra
Taxonomic Remarks
This species differs from R. sp2 by its less rounded whorls, more translucent shell, more narrow aperture, lower number of axial ribs, much weaker spiral sculpture with a lower number of spiral cords, strong denticulation on the inside of the outer lip and the presence of a denticulated rim on the columella It differs from R. sp11 by its less shoulder, more elegant shell shape, higher number of axial ribs, weaker and less numerous spiral cords, different aperture form, not merged denticles on the inside of the outer lip and the presence of cream markings on the teleoconch.
Received All Minimal Data for Discovery
01/04/2026
Description of Material
Shell of average size for the genus, adult size up to 3.6 mm; fusifom with slightly rounded whorls. Suture slightly impressed. Semi-translucent. Protoconch paucispiral, consisting of about 1.5 smooth whorls. Transition to teleoconch clearly visible. Teleoconch consisting of 3.4 whorls. Axial sculpture of strong axial ribs on all whorls. About 17 ribs on the fist whorl increasing to 19 ribs on the third whorl. The last axial rib close to the aperture is much stronger. Spiral sculpture absent on the first whorl. From the second whorl a subsutural spiral cord is visible. Other spiral sculpture absent on the first whorls and only very weak on the last part ot the last whorl. This spiral sculpture consists of weak flat spiral cords with very narrow interspaces, which overrun the axial ribs. There are about 10-11 of these cords, which go abapically over in the much stronger present basal cords. Basal cords ventrally ranging to just above the adapical end of the columella. Aperture rather narrow for the genus, about 47% of shell height. Outside of outer lip thickened with continuation of the spiral sculpture and basal cords. Inside of outer lip with a clear sinus on the adapical end and 6 denticles, of which the adapical most are stronger than the others. Columellar callus thick, slightly raised, with a weak rim of merged denticles. Parietal callus clearly present. Siphonal canal short, open, slighly recurved. Teleoconch completely semi-translucent white, with some cream irregular markings. Most of this cream markings are just below the subsutural spiral cord. Aperture, columella and parietal callus white. Protoconch with a cream to pale orange zone on the first part, fading to off-white to near the transition with the teleoconch. Height of holotype: 3.6 mm
Ecology
Direct developing species with paucispiral protoconch, so non planctotrophic larvae. Most likely endemic.
Distribution
SPANBIOS expedition MNHN: stn DW5229, 18°13,3’S, 163°03,3’E, 247-248m, 1 dd juv; stn DW5240, 18°01,1’S, 163°01,7’E, 397-475m, 1 dd (holotype); stn DW5243, 18°00’S, 162°59,7’E, 607-620m, 3 dd.
Scientific Name Authorship
Monsecour, Kevin
Stacked from 29 images. Method=B (R=8,S=4)
Stacked from 20 images. Method=B (R=8,S=4)
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