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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Scalloped bonnethead ： ウィキペディア英語版 Scalloped bonnethead The scalloped bonnethead, ''Sphyrna corona'', is a rare, little-known species of hammerhead shark, and part of the family Sphyrnidae. Its other common names include the mallethead shark and the crown shark.〔 It is found in tropical and subtropical waters in the eastern Pacific Ocean, from Mexico to Peru, and possibly as far north as the Gulf of California.〔Compagno, Leonard J. V. (1984) ''Sharks of the World: An Annotated and Illustrated Catalogue of Shark Species Known to Date''. Rome: Food and Agricultural Organization. ISBN 92-5-101384-5.〕 It frequents inshore habitats over soft bottoms (mud, sand, and gravel) to a depth of 100 m, and also enters mangroves and estuaries.〔 Probably the smallest species of hammerhead shark, the scalloped bonnethead measures up to 92 cm long. Its mallet-shaped head, called a "cephalofoil", is moderately wide (24-29% of total length) and elongated lengthwise. The front margin is broadly arched, with shallow lateral and medial indentations, and no prenarial grooves. The mouth is small and strongly arched. The anal fin is long and has a nearly straight rear margin. Its coloration is gray above and white below, with no prominent fin markings. The similar scoophead (''Sphyrna media'') can be distinguished by a shorter snout, broader mouth, and a deeply concave anal fin margin.〔 Like other hammerheads, the scalloped bonnethead is viviparous, with presumably 2 pups per litter. The young are born at 23 cm or above; an adolescent male has been recorded at 51 cm long, and an adult at 67 cm. It may be taken by local inshore fisheries, but data is lacking.〔 It feeds on or near the bottom, on mobile crustaceans and molluscs, cephalopods, echinoderms, and bony fishes.〔"(Sphyrnidae: Sphyrna corona )". ''Discover Life''. Retrieved on October 24, 2008.〕 ==References== 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「Scalloped bonnethead」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.