Stacked from 41 images. Method=B (R=8,S=4)
Stacked from 34 images. Method=B (R=8,S=4)
Species ID
OC-SP-0002563
Discovered
Phylum
Mollusca
Species ID
OC-SP-0002563
Provisional Species Name
Maintenonia duolineata
Lowest Valid Taxon Name in WoRMS
Maintenonia
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
Maintenonia
Taxonomic Remarks
This species belongs to the same group as the preceding species, so is also only tentatively placed in Maintenonia. It differs from Maintenonia sp 1 in its smaller size, lower number of less straight whorls, more clear axial ribs and different color pattern. It differs from Z. vexillum by its less rounded whorls, wider shell, less incised suture, narrrower aperture and slightly different color pattern. M. spiratella is slightly smaller, has a narrower shell, has much weaker axial ribs which are obsolete on the early teleoconch whorls, has spiral sculpture, a less elongate aperture with a lower number of basal cords and another color pattern.
Received All Minimal Data for Discovery
01/04/2026
Description of Material
Shell of rather small size for the genus, up to 5.3 mm; biconical, elongate. Slightly rounded whorls. Suture slightly impressed. Protoconch paucispiral, of about 1.5 smooth whorls. Transition to teleoconch very weak. Teleoconch of about 5 whorls; Axial sculpture absent on beginning of first whorl and starting weak near the end of this whorl. On the lower teleoconch whorls the axial sculpture is clearly present and consists of axial ribs with interspaces about the same width as the ribs. There are 10 axial ribs on each whorl. Last axial rib close tot he aperture much weaker. Spiral sculpture absent, apart from the basal cords, which are clearly present on last whorl, extending to just the adapical end of the columella. Aperture elongate and rather narrow and about 43% of shell height. Outer lip not thickened, bearing continuations of basal cords on abapical end. Seen from the side, the lip is not straight, with the middle of the lip standing slightly wider than the adapical end near the sinus. Inside of outer lip without a clear sinus and not denticulate. Columellar callus weak over the basal cords, but basal cords stay clearly visible. Parietal callus weak. Siphonal canal very short, half-open, slightly recurved. Early teleoconch whorls whitish with a very narrow brown interrupted band just below the suture, and a second narrow brown interrupted band just above the suture of the next whorl. Last whorl whith the same pattern, on its adapical side and below this the whorl is semi-translucent beige. Aperture with the outside shell color coming through. Columella in the beige color with even a very weak tint of purple. Protoconch faint purple with a yellow-orange nucleus. Height of holotype: 5.3 mm
Ecology
Direct developing species with paucispiral protoconch, so non planctotrophic larvae. Most likely endemic.
Distribution
MNHN SAYA expedition: Saya de Malha: stn YB01, 10°22,7’S, 62°07,7’E, 24m, 1 dd (holotype); stn YS16, 10°44’S, 62°00,4’E, 27m, 1 dd juv; stn YS18, 10°44’S, 62°00,8’E, 30m, 1 lv.
Scientific Name Authorship
Monsecour, Kevin
Stacked from 41 images. Method=B (R=8,S=4)
Stacked from 34 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.
