Myliobatiformes is one of the four orders of batoids, cartilaginous fishes related to sharks. They were formerly included in the order Rajiformes, but more recent phylogenetic studies have shown the myliobatiforms to be a monophyletic group, and its more derived members evolved their highly flattened shapes independently of the skates. Rajiformes /ˈrædʒɪfɔːrmiːz/ is one of the four orders in the superorder Batoidea, flattened cartilaginous fishes related to sharks. Rajiforms are distinguished by the presence of greatly enlarged pectoral fins, which reach as far forward as the sides of the head, with a generally flattened body. The undulatory pectoral … See more Rajoids typically have a dorsoventrally flattened body. The snout is slender and pointed and the wide mouth, often covered with a fleshy nasal flap, is on the underside of the head. The eyes and well-developed spiracles … See more Families Four extant and five extinct families of rajoid have been described: • Anacanthobatidae • Arhynchobatidae • Gurgesiellidae See more Species of the order Rajiformes are found throughout the world's oceans, from Arctic to Antarctic waters, and from shallow coastal shelves to open seas and abyssal regions. A few are … See more In most rajoids, water for breathing is taken in through the spiracles rather than through the mouth and exits through the gill slits. Most species swim by undulating their enlarged … See more

ADW: Gymnuridae: INFORMATION - Animal Diversity Web

WebRajiformes—The batoid phylogeny of this analysis is close to Nishida (1990) in the following points: (1) pristids are the most plesiomorphic batoids, (2) “rhinobatoids” are not … Webปลากระเบน. ปลากระเบน คือ ปลากระดูกอ่อน จำพวกหนึ่งที่อยู่ใน ชั้นย่อยอีลาสโมแบรนชิไอ (Elasmobranchii) ในอันดับใหญ่ที่ใช้ ชื่อ ... flapper feather hat

Rajiformes - rays, sawfish, skates Wildlife Journal Junior

WebRajiformes on Wikimedia Commons. Wikimedia Commons Ruggiero MA, Gordon DP, Orrell TM, Bailly N, Bourgoin T, Brusca RC, et al. (2015) A Higher Level Classification of All Living … Web鳐鱼，属于软骨鱼纲鳐形目 Rajiformes和鲼形鱼目，是多种扁体软骨鱼的统称。分布于全世界大部分水区，从包括2亚目，共8科约49属315种。中国产6科8属28种。我国各地俗称不 … Webdewiki Rajiformes; enwiki Rajiformes; eswiki Rajiformes; euwiki Rajiformes; fawiki چارگوش‌ماهی‌سانان; fiwiki Rauskukalat; frrwiki Rajiformes; frwiki Rajiformes; glwiki Raiformes; … flapper feather headpiece