Stacked from 32 images. Method=B (R=8,S=4)
Stacked from 27 images. Method=B (R=8,S=4)
Species ID
OC-SP-0002549
Discovered
Phylum
Mollusca
Species ID
OC-SP-0002549
Provisional Species Name
Anachis sp_MNHN_IM_2000_40365
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 can easily be distinguished from all other deep water Anachis species known from deep water in the region by its low number of axial ribs with wide interspaces, its very weak almost obsolete spiral sculpture on the last whorl and its rather wide aperture.
Received All Minimal Data for Discovery
01/04/2026
Description of Material
Shell of small size for the genus, adult size up to 4.7mm; fusifom, elongate. Slightly rounded whorls. Suture slightly impressed. Protoconch paucispiral, consisting of about 1.2 smooth whorls. Transition to teleoconch weakly visible. Teleoconch consisting of about 3.8-3.9 whorls. Axial sculpture on all whorls, consisting of axial ribs with rather wide interspaces. There are 10-11 weak ribs on the first teleoconch whorl and 10 on each of both later whorls. The last axial rib close to the aperture is stronger. Spiral sculpture apart from the basal cords virtually absent, but on the last whorl there are very weak spiral cords with narrow interspaces. The basal cords are clearly present and reaching to the adapical end of the columella. Aperture rather wide for the genus, about 41% of shell height. Outside of outer lip with the continuation of the basal cords. Inside of outer lip without clear sinus and wirh a weak rim of semi-merged denticles. Columellar callus weak, not raised, without denticulation. Parietal callus very weak. Siphonal canal short, open, slightly recurved. Teleoconch, aperture, columella and protoconch white. Height of holotype: 4.5 mm
Ecology
Direct developing species with paucispiral protoconch, so non planctotrophic larvae. Most likely endemic.
Distribution
SPANBIOS expedition MNHN: stn DW5166, 18°40’S, 163°16’E, 556-577m, 4 dd; stn DW5167, 18°41,2’S, 163°15,9’E, 568-575m, 1 dd; stn DW5211, 18°07’S, 163°10’E, 497-498m, 1 dd; stn DW5223, 18°29,1’S, 162°59,9’E, 530-545m, 9 dd (Holotype incl), 6 dd juv; stn DW5237, 18°04,5’S, 163°00,9’E, 339-356m, 1 dd; stn DW5243, 18°00’S, 162°59,7’E, 607-620m, 4 dd, 2 dd juv; stn DW5244, 17°59,3’S, 162°59,8’E, 723-727m, 1 dd.
Scientific Name Authorship
Monsecour, Kevin
Stacked from 32 images. Method=B (R=8,S=4)
Stacked from 27 images. Method=B (R=8,S=4)
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