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==Description== Maximum size: 62 mm SL (Gunter 1950). Coloration: Body not barred (Hubbs et al. 1991). Back silvery to light green, with a narrow, dark middorsal stripe. Scales on sides outlined in melanophores, creating cross-hatched pattern, which is especially prominent in breeding males. Forward and upper surfaces of the head speckled with melanophores, which also extend onto the underside of the lower jaw. Belly and undersides of body are silver. Fins generally lack pigmentation, except for some melanophores along the rays. In breeding males, dorsal fin has a black anterior blotch and dark marginal and basal bands that may include orange pigmentation. Caudal, anal, and pelvic fins red to orange, with black marginal bands (Gunter 1950; Simpson and Gunter 1956; Ross 2001). Counts: 10+ dorsal fin rays; 8-13 scale rows from pelvic origin to isthmus; 30 or fewer longitudinal scale rows (Hubbs et al. 1991); 27 (26-28) lateral scales; 11 (9-13) dorsal fin rays; 13 (12-14) pectoral fin rays; 6 (4-7) pelvic fin rays; 9 (8-13) anal fin rays; 16 (15- 18) caudal fin rays; 8 (5-9) gill rakers on 1st arch (Sublette et al. 1990). Body shape: Body deep, rather compressed; head flattened above, tapering to vertically rounded, blunt snout (Hardy 1978). Body depth contained four times in standard length (Hubbs et al. 1991). Body axis straight (Sublette et al. 1990). Mouth position: Supraterminal, oblique; mouth small; obliquely sloped, protruding lower jaw (Sublette et al. 1990). External morphology: Distance from origin of dorsal fin to end of hypural plate more than distance from origin of dorsal fin to preopercle (Hubbs et al. 1991); dorsal and caudal fins rounded; pectorals, pelvic, anal fins rounded at apex (Sublette et al. 1990). Males develop prickly contact organs on top and sides of head and on side of body between dorsal and anal fin bases (Foster 1967; Collette 1977). Female with membranous sheath surrounding genital opening (Sublette et al. 1990). Internal morphology: Teeth conical and simple (Hubbs et al. 1991). Premaxillary and mandibular teeth uniserial or irregular, occasionally with a few strong inner teeth (Sublette et al. 1990). 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「Rainwater killifish」の詳細全文を読む スポンサード リンク
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