Neoterebra sterigma

Neoterebra sterigma
Shell of Neoterebra sterigma (holotype at MNHN, Paris)
Scientific classification Edit this classification
Kingdom: Animalia
Phylum: Mollusca
Class: Gastropoda
Subclass: Caenogastropoda
Order: Neogastropoda
Family: Terebridae
Genus: Neoterebra
Species:
N. sterigma
Binomial name
Neoterebra sterigma
(Simone, 1999)
Synonyms[1]
  • Terebra sterigma Simone, 1999 (original combination)

Neoterebra sterigma is a species of sea snail, a marine gastropod mollusk in the family Terebridae, the auger snails.[1]

Neoterebra sterigma is a typical species of deep-sea benthic snails in the western Atlantic Ocean. Its distinguishing features are fine shell carvings and wide apex angles, which are significantly different from shallow-sea species of the same genus (such as N. guadeloupensis).[2]

Classification

Neoterebra sterigma (Simone, 1999) belongs to the superfamily Conoidea, family Terebridae, and genus Neoterebra. It is currently only recorded in the Brazilian waters of the western Atlantic Ocean, with a habitat depth of 340–360 meters. It is a typical deep-sea aquatic species.[2]

Morphological Characteristics

Shell type

Small snail, shell length 16.4-24.2 mm (including paratype), with a wide and fat outline, convex whorls, and a wide apex angle (compared with the closely related species N. pruvosti).[2]

Shell surface carving

Axial ribs and spiral carvings: Axial ribs are fine and closely spaced (about 3 times the rib width), and the spiral carvings are dense and deep, cutting the top of the axial ribs to form a grid-like structure (different from the wide spacing and coarse carvings of N. pruvosti).[2]

Suture zone: With white sub-suture zone, deep indentations on the edge, and rectangular pits formed by the axial ribs inside the zone.[2]

Color: The shell color of living organisms is light yellow to pinkish white, and the sub-suture zone is white (the type specimen may fade to pure white because it was collected as a dead shell).[2]

Protoshell: 1.5-2.0 whorls, spherical core, and unclear transition from the body.[2]

Description

The length of the shell attains 11.9 mm.

Distribution

This species occurs in the Atlantic Ocean off Southeast Brazil.

References

  1. ^ a b MolluscaBase eds. (2020). MolluscaBase. Neoterebra sterigma (Simone, 1999). Accessed through: World Register of Marine Species at: http://www.marinespecies.org/aphia.php?p=taxdetails&id=1416762 on 2020-01-27
  2. ^ a b c d e f g Dominique Lamy, Yves Terryn (2024). "A new species of Neoterebra from Guadeloupe and Martinique" (PDF).
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