Stacked from 27 images. Method=B (R=8,S=4)
Stacked from 24 images. Method=B (R=8,S=4)
Species ID
OC-SP-0002559
Discovered
Phylum
Mollusca
Species ID
OC-SP-0002559
Provisional Species Name
Anachis sp_MNHN_IM_2000_40375
Lowest Valid Taxon Name in WoRMS
Anachis
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
Anachis
Taxonomic Remarks
This species can easily be distinguished from the other deep water Anachis from the region by its elegant shell, its slightly rounded, not shouldered whorls, very high amount of axial ribs, more adapically present basal cords and its color pattern.
Received All Minimal Data for Discovery
01/04/2026
Description of Material
Shell of very small size for the genus, adult size up to 3.3 mm; fusifom, elongate. Semi-translucent. Slightly rounded whorls. Suture slightly impressed. Protoconch paucispiral, consisting of about 1.3 smooth whorls. Transition to teleoconch clearly visible. Teleoconch consisting of about 3.2-3.3 whorls. Axial sculpture on all whorls, consisting of axial ribs with rather narrow interspaces. There are 18 ribs on the first teleoconch whorl, 22-23 on the second teleoconch whorl and 17-18 on the last whorl. Last axial rib close to the aperture much stronger. Spiral sculpture virtually absent apart from the basal cords. Close to the aperture there is some very weak, almost obsolete spiral sculpture visible consisting of flat cords with narrow interspaces. Basal cords clearly present and reaching to just above the adapical end of the columella. Virtually there seems to be a subsutural cord present, but this is only deeper lying shell structure shining through. Aperture rather narrow for the genus, about 44% of shell height. Outside of outer lip with the continuation of the basal cords and the very weak spiral sculpture. Inside of outer lip without a clear sinus and with 5-6 denticles. Adapical most denticles are stronger. Columellar callus clearly present, smooth. Parietal callus clearly present. Siphonal canal short, open, slightly recurved. Teleoconch whorls semi-translucent off-white with beige irregular markings. Just below the suture a beige interrupted line is visible. Aperture with some beige markings near the edge, deeper semi-translucent and shell color shining through. Columella white. Protoconch slightly translucent white. Height of holotype: 3.3 mm
Ecology
Direct developing species with paucispiral protoconch, so non planctotrophic larvae. Most likely endemic.
Distribution
SPANBIOS expedition MNHN: stn CP5221, 18°41,7’S, 163°06,1’E, 826-850m, 2 dd; stn DW5207, 18°09’S, 163°05,3’E, 239-248m, 2 dd; stn DW5225, 18°17,4’S, 162°58’E, 318-324m, 2dd; stn DW5238, 18°06,5’S, 163°03,4’E, 254-274m, 14 dd (holotype incl), 1 dd juv; stn DW5239, 18°07,3’S, 163°02’E, 249-251m, 8 dd, 1 dd juv; stn DW5243, 18°00’S, 162°59,7’E, 607-620m, 10 dd, 2 dd juv.
Scientific Name Authorship
Monsecour, Kevin
Stacked from 27 images. Method=B (R=8,S=4)
Stacked from 24 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.
