Mangelia subsida

Mangelia subsida is a species of sea snail, a marine gastropod mollusk in the family Mangeliidae.[1]

Mangelia subsida
Shell of Mangelia subsida (holotype at the Smithsonian Institution)
Scientific classification
Kingdom: Animalia
Phylum: Mollusca
Class: Gastropoda
Clade: Caenogastropoda
Clade: Hypsogastropoda
Clade: Neogastropoda
Superfamily: Conoidea
Family: Mangeliidae
Genus: Mangelia
Species:
M. subsida
Binomial name
Mangelia subsida
(Dall, 1881)
Synonyms[1]
  • Drillia subsida (W.H. Dall, 1881)
  • Fusus simplex Grateloup, J.P.S. de, 1847
  • Pleurotoma (Drillia) subsida Dall, 1881 (original combination)

Description

The length of the shell attains 13 mm, its diameter 6 mm.

(Original description) The stout, solid, fusiform shell is waxy white. it contains nine whorls. The protoconch is brown and smooth. The first three subsequent whorls are sculptured with neat flexuous ribs transversely disposed. The next four whorls are crossed transversely with only the rather strong and distinct rounded lines of growth which cover pretty much all the rest of the shell except the tops of the longitudinal riblets. The longitudinal sculpture shows a keel just in advance of the suture upon which the posterior edge of the former is appressed, then a few faint revolving striae on the bi'oad notch-band, then two more keels, or sharp squarish riblets (on the body whorl ten or twelve). The first are marked with numerous knobby waves extending forward in the interspace toward the second keel rather than outwardly, and sometimes meeting and slightly waving the second keel .These waves make their appearance on about the fifth whorl, and are evanescent on the last whorl. There are about three in a millimeter and a half. The aperture is narrow and slightly callous. The short siphonal canal is nearly straight. The columella is covered with a thin, translucent white callus. The outer lip is not thickened, but might become so in an older shell.[2]

Distribution

M. subsida can be found in waters of the Florida Strait.[3] and Dry Tortugas at a depth of 620 m.

gollark: I think it's .gg, not .sg.
gollark: I might try the quantization-aware training thing and see if that works.
gollark: A shame.
gollark: Did anyone try quantizing the GPT-Neo models to int8? Just using the pytorch dynamic quantization thing (on the 125M one, due to RAM limitations) seems to add enough noise that it just produces nonsense.
gollark: XLNet?

References
  1. Mangelia subsida (Dall, 1881). Retrieved through: World Register of Marine Species on 10 August 2011.
  2. Dall, W. H. 1881. Reports on the results of dredging, under the supervision of Alexander Agassiz, in the Gulf of Mexico, and in the Caribbean Sea, 1877–79, by the United States Coast Survey Steamer 'Blake,'. Bulletin of the Museum of Comparative Zoology 9: 33–144 This article incorporates text from this source, which is in the public domain.
  3. Tunnell, John W., Jr., Felder, Darryl L., & Earle, Sylvia A., eds. Gulf of Mexico Origin, Waters, and Biota, Volume 1: Biodiversity. Texas A&M University Press, 2009. 667.
  • "Mangelia subsida". Gastropods.com. Retrieved 16 January 2019.
  • Tucker, J.K. 2004 Catalog of recent and fossil turrids (Mollusca: Gastropoda). Zootaxa 682:1–1295.
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