Stacked from 40 images. Method=B (R=8,S=4)
Stacked from 39 images. Method=B (R=8,S=4)
Species ID
OC-SP-0002571
Discovered
Phylum
Mollusca
Species ID
OC-SP-0002571
Provisional Species Name
Pyreneola explicatilabris
Lowest Valid Taxon Name in WoRMS
Pyreneola
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
Pyreneola
Taxonomic Remarks
This species has a unique shape of the aperture and can therefore easily be distinguished from all other Columbellidae. The placement in the genus Pyreneola is only tentatively made here, based on general shell form, but this species most likely does not belong in this genus. We refrain from naming a new genus for it now as soft parts or genetic material is not available at the moment.
Received All Minimal Data for Discovery
01/04/2026
Description of Material
Shell of rather big size for the genus, up to 5.6 mm; biconical, elongate. Rather straight whorls. Suture slightly impressed. Protoconch paucispiral, of about 1.5 smooth whorls. Transition to teleoconch clearly visible. Teleoconch of about 5.6 whorls; First whorl with weak axial sculpture of axial ribs with rather wide interspaces. On the further teleoconch whorls this sculpture becomes obsolete, but appears again during the penultimate whorl and is clearly visible until the first part of the last whorl, but here this sculpture is also weak. Last half of last whorl without axial sculpture. There are about 14 axial ribs on the penultimate whorl. Spiral sculpture apart from the basal cords virtually absent. There are microscopic spiral cords over the entire shell surface. Basal cords clearly present and extending to just below the adapical end of the columella. Aperture elongate and rather narrow with the adapical side folded open. Aperture about 41% of shell height. Outer lip very weakly thickened, bearing continuations of basal cords on abapical end. Inside of outer lip with a clear sinus and not denticulate, but with just below the sinus a thickened knob. Lower part of the inside of the aperture smooth. Columellar callus thick, edge not raised, smooth inside. Parietal callus thick. Siphonal canal very short, half-open, slightly recurved. Teleoconch whorls off-white with fine axial orange brown lines and a purplish subsutural band. This band fades further down the teleoconch whorls to white on the last whorls. On the last whorl there are two more purplish bands: a weak one just below mid-whorl and a clearer one over the basal cords. Aperture white with the purple bands shining through. Columella also with the purple bands visible. Protoconch faint purple with a brownish nucleus. Height of holotype: 5.6 mm
Ecology
Direct developing species with paucispiral protoconch, so non planctotrophic larvae. Most likely endemic.
Distribution
MNHN SAYA expedition: Saya de Malha: stn YR07, 11°08,2’S, 60°26,8’E, 25m, 1 dd; stn YR16, 10°12,1’S, 62°09,1’E, 24m, 2 dd juv; stn YS01, 11°08,2’S, 60°26,8’E, 25m, 6 dd (holotype incl), 5 dd juv.
Scientific Name Authorship
Monsecour, Kevin
Stacked from 40 images. Method=B (R=8,S=4)
Stacked from 39 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.
