Stacked from 28 images. Method=B (R=8,S=4)
Stacked from 21 images. Method=B (R=8,S=4)
Species ID
OC-SP-0002578
Discovered
Phylum
Mollusca
Species ID
OC-SP-0002578
Provisional Species Name
Retizafra sp_MNHN_IM_2000_40348
Lowest Valid Taxon Name in WoRMS
Retizafra
Lowest Known Rank
Genus
Status
Discovered
Does the taxonomist(s) intend to work on this material further?
2. I/We already have plans to publish. (For marine invertebrates please know that SOSA could support you in this too - please click the button for more details).
Embargo
No
Kingdom
Animalia
Phylum
Mollusca
Class
Gastropoda
Order
Neogastropoda
Family
Columbellidae
Genus
Retizafra
Taxonomic Remarks
This species looks superficially close to R. sp11. It differs by its almost lacking spiral sculpture, different form of the aperture, lack of the subsutural cord, other denticulation on the inside of the outer lip, weaker columellar denticulation and different color pattern.
Received All Minimal Data for Discovery
01/04/2026
Description of Material
Shell of rather small size for the genus, adult size up to 3.0 mm; fusifom with slightly rounded whorls. Slightly shouldered. Slightly translucent. Suture slightly impressed. Protoconch paucispiral, consisting of about 1.3 smooth whorls. Transition to teleoconch clearly visible. Teleoconch consisting of about 3.1-3.2 whorls. Axial sculpture of about 17 strong axial ribs on all whorls. The last axial rib next to the aperture is stronger. Penultimate and third last rib much weaker than all other ribs. Spiral sculpture absent on all whorls except for te last 25% of the last whorl, where spiral sculpture is weakly visible. This sculpture consists of 11-12 flat spiral cords with very narrow interspaces, which overrun the axial ribs and go abapically over in the much clearly present basal cords. Basal cords ventrally ranging to the adapical end of the columella. Aperture average width for the genus, about 48% of shell height. Outside of outer lip thickened with continuation of the spiral sculpture and basal cords. Inside of outer lip with a weak sinus on the adapical end and 6 denticles below this sinus. Three adapical most denticles stronger. Columellar callus thick, slightly raised, with weak denticulation. Parietal callus clearly present. Siphonal canal short, open, slighly recurved. Teleoconch semi-translucent whitish with non-transulcen white zones on some of the axial ribs and pale brownish irregular markings all over the teleoconch whorls. Aperture with this pattern shining through. Columella and parietal callus white. Protoconch white to off-white. Height of holotype: 2.9 mm
Ecology
Direct developing species with paucispiral protoconch, so non planctotrophic larvae. Most likely endemic.
Distribution
SPANBIOS expedition MNHN: stn DW5238, 18°06,5’S, 163°03,4’E, 254-274m, 32dd, 2 dd juv; stn DW5239, 18°07,3’S, 163°02’E, 249-251m, 7 dd, 1 dd juv; stn DW5243, 18°00’S, 162°59,7’E, 607-620m, 7 dd (incl holotype).
Scientific Name Authorship
Monsecour, Kevin
Stacked from 28 images. Method=B (R=8,S=4)
Stacked from 21 images. Method=B (R=8,S=4)
Join the census
The Ocean Census Alliance unites national and philanthropic marine institutes, museums, and universities, backed by governments, philanthropy, business and civil society partners.
