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Quietula : ウィキペディア英語版
Quietula

''Quietula'' is a genus of fish in the goby family, Gobiidae. There are two species, both native to the Gulf of California in Mexico. One is endemic to the Gulf, and the other also occurs along the western coast of Baja California and the coast of California. The fish were first described from Guaymas in Sonora, Mexico.〔Ahnelt, H. and J. Göschl. (2003). (Morphological differences between the eastern Pacific gobiid fishes ''Quietula guaymasiae'' and ''Quietula y-cauda'' (Teleostei: Gobiidae) with emphasis on the topography of the lateral line system. ) ''Cybium'' 27(3), 185-97.〕 The genus name ''Quietula'' is from the Latin ''quietus'', meaning "quiet".〔Froese, R. and D. Pauly. (Eds.) (''Quietula guaymasiae''. ) FishBase. 2011.〕
These gobies have elongated bodies and compressed heads with large eyes and large mouths, with the corner of the mouth located posterior to the eye. Most of the front end of the body is without scales. The caudal fin is rounded. ''Q. guaymasiae'' and ''Q. y-cauda'' can be distinguished by the shape of the dark spot on the caudal fin; the former has a transverse marking at the base of the fin, while the latter has a sideways y-shaped spot that extends forward onto the caudal peduncle. The two species are also distinguished by the number of rays in the pectoral fin, the number of scales, and the arrangement of neuromasts in the lateral line.〔
Species:
* ''Quietula guaymasiae'' (Jenkins & Evermann, 1889), the Guaymas goby, is endemic to the Gulf of California.〔 It can be locally common in its estuary and lagoon habitat, but it may be threatened by coastal activity such as development and shrimp aquaculture.〔Findley, L. 2010. (''Quietula guaymasiae''. ) In: IUCN 2013. IUCN Red List of Threatened Species. Version 2013.1. Downloaded on 11 October 2013.〕
* ''Quietula y-cauda'' (Jenkins & Evermann, 1889), the American shadow goby, occurs in sympatry with ''Q. guaymasiae'' in the northern Gulf.〔 It also occurs on the western coast of Baja California, its range extending along the California coast as far north as Morro Bay. It lives at the mouths of rivers and on the mudflats of lagoons. It sometimes occupies worm or shrimp burrows. Males guard the eggs.〔Froese, R. and D. Pauly. (Eds.) (''Quietula y-cauda''. ) FishBase. 2011.〕
==References==


抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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