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''Strombus pugilis'', common names the fighting conch and the West Indian fighting conch, is a species of medium to large sea snail, a marine gastropod mollusk in the family Strombidae, the true conchs. ''S. pugilis'' is closely similar to ''Strombus alatus'', the Florida fighting conch. It is unsettled whether they are distinct species or merely subspecies. ==Shell description== The maximum recorded shell length is 110 mm〔Welch J. J. (2010). "The "Island Rule" and Deep-Sea Gastropods: Re-Examining the Evidence". ''PLoS ONE'' 5(1): e8776. .〕 or up to 130 mm,〔Leal, J.H. (2002). Gastropods. p. 99-147. In: Carpenter, K.E. (ed.). (The living marine resources of the Western Central Atlantic. Volume 1: Introduction, molluscs, crustaceans, hagfishes, sharks, batoid fishes, and chimaeras. ) FAO Species Identification Guide for Fishery Purposes and American Society of Ichthyologists and Herpetologists Special Publication No. 5. 1600p.〕 commonly to 90 mm. Like other species in the same genus, ''Strombus pugilis'' has a robust, somewhat heavy and solid shell, with a characteristic stromboid notch. It has a well-developed body whorl and a short and pointed spire. It presents 8 to 9 whorls,〔 each of them having a single row of subsutural spines, becoming larger towards the last whorl.〔 These spines, however, may be less conspicuous or even absent in some populations.〔 Its aperture is relatively long and slightly oblique.〔 The posterior angle of the outer lip is distinct, projecting in the posterior direction in an erect fashion.〔Cervigón, F. ''et al.'' (1993): FAO species identification sheets for fishery purposes. Field guide to the commercial marine and brackish-water resources of the northern coast of South America. Rome, FAO. 513 p.〕 The operculum is sickle-shaped, similar to several other ''Strombus'' snails. The shell color varies from salmon-pink, cream or yellow to light or strong orange, and the interior of the aperture is usually white. The anterior end presents a dark purple stain,〔 which is one of the diagnostic characters of this species, and is absent in ''Strombus alatus''. This species is closely similar to ''Strombus alatus'', which has a more northerly range. ''Strombus alatus'' shells have less prominent subsutural spines and a slightly more projected outer lip. Some scientists have treated the two as distinct species; others as subspecies.〔( Simone (2005): Comparative Morphological study of representatives of the three families of Stromboidea and the Xenophoroidea (Mollusca, Caenogastropoda), with an assessment of their phylogeny ), p. 142.〕 In an extensive study of the Stromboidea in 2005, Simone provisionally treated these as distinct species, but observed that "no spectacular morphological difference was found () all related differences, even those of the genital system, can be regarded as extreme of variation of a single, wide distributed, variable species."〔( Simone (2005): Comparative Morphological study of representatives of the three families of Stromboidea and the Xenophoroidea (Mollusca, Caenogastropoda), with an assessment of their phylogeny ), p. 169.〕 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Strombus pugilis」の詳細全文を読む スポンサード リンク
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