Stacked from 26 images. Method=B (R=8,S=4)
Stacked from 26 images. Method=B (R=8,S=4)
Species ID
OC-SP-0002576
Discovered
Phylum
Mollusca
Species ID
OC-SP-0002576
Provisional Species Name
Retizafra sp_MNHN_IM_2000_40346
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 can easily be distinghuised from all other Retizafra from the region by its rather small size, the absence of spiral sculpture on the early teleoconch whorls, the weaker axial ribs, the aperture which is rather wide and the lack of denticles on both inside of outer lip and columella.
Received All Minimal Data for Discovery
01/04/2026
Description of Material
Shell of rather small size for the genus, adult size up to 2.7 mm; fusifom with slightly rounded whorls. Suture slightly impressed. Semi-translucent. Protoconch paucispiral, consisting of about 1.25 smooth whorls. Transition to teleoconch clearly visible. Teleoconch consisting of about 3-3.2 whorls. Axial sculpture very weak, almost obsolete on first part of the first whorl, becoming stronger further on this whorl. Clearly visible on further teleoconch whorls. There are about 18 to 20 ribs on each whorl. The last axial rib close to the aperture is not stronger. Spiral sculpture consisting of a thin subsutural cord on all whorls. Other spiral sculpture absent on the first whorls, very weak on the beginning of the last whorl and only clearly visible on the last half of the last whorl. This spiral sculpture on the last whorl exists of about 11 weak rather rounded cords with rather narrow interspaces. which overrun the axial ribs, and going over in the basal cords. Basal cords very weak, almost obsolete ventrally ranging to the adapical end of the columella. Aperture rather wide for the genus, about 44% of shell height. Outside of outer lip only very weakly thickened, with the continuation of the basal cords clearly present, spiral sculpture obsolete. Inside of outer lip with a very weak sinus on the adapical end and no denticles. Columellar callus thick, with a weak ridge, but not denticulate. Parietal callus clearly present. Siphonal canal short, open, slightly recurved. Shell color pale cream on early teleoconch whorls, white on the last whorl. The inside of the aperture, columella and parietal callus white. Protoconch brownish. Height of holotype: 2.5 mm
Ecology
Direct developing species with paucispiral protoconch, so non planctotrophic larvae. Most likely endemic.
Distribution
SPANBIOS expedition MNHN: stn DW5208, 18°08,7’S, 163°07,1’E, 317-338m, 2 dd; stn DW5243, 18°00’S, 162°59,7’E, 607-620m, 20 dd (incl holotype).
Scientific Name Authorship
Monsecour, Kevin
Stacked from 26 images. Method=B (R=8,S=4)
Stacked from 26 images. Method=B (R=8,S=4)
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