Xanthodaphne agonia

Xanthodaphne agonia
	Original image of a shell of Xanthodaphne agonia
Scientific classification
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Gastropoda
Clade:	Caenogastropoda
Clade:	Hypsogastropoda
Clade:	Neogastropoda
Superfamily:	Conoidea
Family:	Raphitomidae
Genus:	Xanthodaphne
Species:	X. agonia
Binomial name
	Xanthodaphne agonia; (Dall, 1890)
Synonyms[1]
	Mangilia agonia Dall, 1890; Pleurotomella (Gymnobela) agonia Dall, 1890;

Xanthodaphne agonia is a species of sea snail, a marine gastropod mollusk in the family Raphitomidae.[1]

Subspecies: Xanthodaphne agonia altina (Dall, 1908)

Description

The length of the shell attains 16 mm, its diameter 8 mm.

(Original description) The small, thin shell is bright yellow-brown. It contains six full and rounded whorls. The protoconch is lost, but without doubt of the Sinusigera type. The spiral sculpture in front of the fasciole consists of numerous sharp elevated threads with wider interspaces, between each pair of which, except on the siphonal canal, are one or two smaller intercalary threads. On the fasciole there are only a few comparatively faint threads, which do not rise above the transverse sculpture, while on the body the spiral sculpture is predominant though minutely undulated by the other. The transverse sculpture is composed of numerous fine, rounded, somewhat elevated threads with wider interspaces, forming a series of elegant concavely arched ripples on the anal fasciole, beyond which they become fainter, closer, and obscure, being over-ridden by the spirals which they minutely undulate. The fasciole is slightly impressed and extends to the suture, which is distinct but not channeled. The notch is shallow and gently rounded. The outer lip is arched forward and sharp. The body is covered with a tbin glaze, in the aperture. The columella is thin, twisted, not pervious. The siphonal canal is short and distinct. [2]

Distribution

This marine species was found off the Galapagos Islands.

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References

Xanthodaphne agonia (Dall, 1890). Retrieved through: World Register of Marine Species on 5 April 2010.
Dall, W.H. (1890) Scientific results of explorations by the U.S. Fish Commission Steamer Albatross. No. VII – Preliminary report on the collection of Mollusca and Brachiopoda obtained in 1887–88. Proceedings of the United States National Museum, 12, 219–362, pls. 5–14 This article incorporates text from this source, which is in the public domain.

External links

Tucker, J.K. (2004). "Catalog of recent and fossil turrids (Mollusca: Gastropoda)" (PDF). Zootaxa. 682: 1–1295.

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[WoRMS-1] Xanthodaphne agonia (Dall, 1890). Retrieved through: World Register of Marine Species on 5 April 2010.

[2] Dall, W.H. (1890) Scientific results of explorations by the U.S. Fish Commission Steamer Albatross. No. VII – Preliminary report on the collection of Mollusca and Brachiopoda obtained in 1887–88. Proceedings of the United States National Museum, 12, 219–362, pls. 5–14 This article incorporates text from this source, which is in the public domain.