Stacked from 34 images. Method=B (R=8,S=4)
Stacked from 29 images. Method=B (R=8,S=4)
Species ID
OC-SP-0002547
Discovered
Phylum
Mollusca
Species ID
OC-SP-0002547
Provisional Species Name
Anachis sp_MNHN_IM_2000_40363
Lowest Valid Taxon Name in WoRMS
Anachis
Lowest Known Rank
Genus
Status
Discovered
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Embargo
No
Kingdom
Animalia
Phylum
Mollusca
Class
Gastropoda
Order
Neogastropoda
Family
Columbellidae
Genus
Anachis
Taxonomic Remarks
This species differs from A. constrictocanalis by its more straight whorls, narrower interspaces between the axial ribs, wider aperture and the presence of denticles on the inside of the outer lip.
Received All Minimal Data for Discovery
01/04/2026
Description of Material
Shell of small size for the genus, adult size up to 3.9 mm; fusifom, elongate. Slightly rounded whorls. Semi-translucent. Suture slightly impressed. Protoconch paucispiral, consisting of about 1.5 smooth whorls. Transition to teleoconch clearly visible. Teleoconch consisting of about 3.7 whorls. Axial sculpture on all whorls, consisting of axial ribs with interspaces slightly wider than the width of the ribs. There are 12 ribs on the first teleoconch whorl and 9 ribs each of the later whorls. The last axial rib close to the aperture is stronger. Spiral sculpture apart from the basal cords absent. The basal cords are clearly present and reach to just above mid-columella. Aperture rather wide for the genus, about 45% of shell height. Outside of outer lip smooth. Inside of outer lip with a weak sinus and with five denticles. Adapical most denticles stronger than the others. Columellar callus clearly present, slightly raised, without denticulation. Parietal callus clearly present. Siphonal canal short, open, slightly recurved. Teleoconch whorls off-white with irregular cream markings. On the lower part of the last whorl there is a more pronounced darker cream spiral band. Inside of aperture and columella white. Protoconch semi-translucent white. Height of holotype: 3.7 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, 43 dd (holotype incl), 16 dd juv; stn DW5210, 18°08,1’S, 163°08,4’E, 416-420m, 13 dd, 6 dd juv; stn DW5215, 18°31,1’S, 163°04,6’E, 342-344m, 1 lv, 1 lv juv, 16 dd, 4 dd juv; stn DW5243, 18°00’S, 162°59,7’E, 607-620m, 12 dd, 3 dd juv; stn DW5244, 17°59,3’S, 162°59,8’E, 723-727m, 2 dd, 1 dd juv.
Scientific Name Authorship
Monsecour, Kevin
Stacked from 34 images. Method=B (R=8,S=4)
Stacked from 29 images. Method=B (R=8,S=4)
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