Spurdog | 水產百科網
SqualusisagenusofdogfishsharksinthefamilySqualidae.Commonlyknownasspurdogs,thesesharksarecharacterizedbysmoothdorsalfinspines,teeth ...
Genus of sharks
Squalus is a genus of dogfish sharks in the family Squalidae. Commonly known as spurdogs, these sharks are characterized by smooth dorsal fin spines, teeth in upper and lower jaws similar in size, caudal peduncle with lateral keels; upper precaudal pit usually present, and caudal fin without subterminal notch. In spurdogs, the hyomandibula (the bone connecting the braincase to the jaws) is oriented at a right angle to the neurocranium, while in other sharks, the hyomandibula runs more parallel to the body. This led some to think that the upper jaw of Squalus would not be as protractile as the jaws of other sharks. However, a study that compared different jaw suspension types in sharks showed that this is not the case and that Squalus is quite capable of protruding its upper jaw during feeding.[2]
The name comes from squalus, the L...
(PDF) Contribution to the knowledge of morphology of teeth ... | 水產百科網
5 things the movie "Jaws" got wrong | 水產百科網
Jaws (1975) | 水產百科網
Jaws (1975) | 水產百科網
Spurdog | 水產百科網
Squalus melanurus (2) Spurdog shark's Jaws ... | 水產百科網
Squalus melanurus (3) Spurdog Shark's Jaws ... | 水產百科網
Squalus melanurus (4) Spurdog Shark's Jaws ... | 水產百科網
Two functional series of lower jaw of a Spiny dogfish shark ... | 水產百科網
【短吻棘鮫Squalus megalops】棘鮫科 (Squalidae)
水產分類:台灣常見的大陸水產品圖說中文名稱:短吻棘鮫學名:Squalusmegalops科別名稱:棘鮫科(Squalidae)命名學者:(Macleay)
【長吻棘鮫Squalus japonicus】棘鮫科 (Squalidae)
水產分類:台灣常見的大陸水產品圖說中文名稱:長吻棘鮫學名:Squalusjaponicus科別名稱:棘鮫科(Squalidae)命名學者:Ishikawa