Supplanaxis niger explained

Supplanaxis niger is a species of sea snail, a marine gastropod mollusk in the family Planaxidae.^[1]

Description

The length of the shell attains 13 mm, its diameter 7.7 mm.

(Original description of Planaxis abbreviata ogasawarana Pilsbry, 1905)) The shell is larger and longer than Planaxis abbreviata Pease (synonym of Supplanaxis niger (Quoy & Gaimard, 1833)), ovate-conic, thick and solid, chocolate-brown, the body whorl covered with a dull fibrous cuticle. Sculpture of spiral grooves, often weak in the middle of the body whorl, strong below the suture and at the base. The shell contains about 6 convex whorls. The aperture is oblique, the outer lip is thickened within, and bearing 11 to 14 lirae, which extend into the throat. The basal and posterior notches are small, deep and rounded.^[2]

Distribution

This marine species occurs off Madagascar, Japan and Papua New Guinea.

References

• Poppe G.T., Tagaro S.P. & Stahlschmidt P. (2015). New shelled molluscan species from the central Philippines I. Visaya. 4(3): 15–59.
• Hasegawa K. (2017). Family Planaxidae. pp. 794–795, in: T. Okutani (ed.), Marine Mollusks in Japan, ed. 2. 2 vols. Tokai University Press. 1375 pp.

External links

• Quoy, J.C.R. & Gaimard, P. (1833) Mollusques. In Dumont d’Urville, M.J. (Ed.) Voyage de Découverts de l’Astrolabe, Éxécuté par Ordre du Roi Pendant les Années 1826–1827–1828–1829, sous le Commandement de M. J. Dumont d' Urville. Zoologie, Tome 2. J. Tatsu
• Smith, E. A. (1872). A list of the species of the genus Planaxis, with descriptions of eleven new species. Annals and Magazine of Natural History. ser. 4, 9: 37-47
• Pease, W. H. (1869). Description of new species of marine Gasteropodæ inhabiting Polynesia. American Journal of Conchology. 5: 64-79
• Pease, W. H. (1865). Descriptions of new genera and species of marine shells from the islands of the Central Pacific. Proceedings of the Zoological Society of London. (1865): 512-517
• Dunker, W. & Zelebor, J. (1866). Bericht über die von der Novara-Expedition mitgebrachten Mollusken. Verhandlungen der Kaiserlich-Königlichen Zoologisch-Botanischen Gesellschaft in Wien. 16: 909-916.

Notes and References

1. Bouchet, P. (2015). Supplanaxis niger (Quoy & Gaimard, 1833). Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=833642 on 2015-04-28
2. https://www.biodiversitylibrary.org/page/26293132 Pilsbry, H. A. (1905). New Japanese marine Mollusca. Proceedings of the Academy of Natural Sciences of Philadelphia. 57: 101-112 [8 April], 113-122, pls 2-5