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Batomorphi is a clade of cartilaginous fishes, commonly known as rays, this taxon is also known as the superorder Batoidea, but the 5th edition of Fishes of the World classifies it as the division Batomorphi. [2] They and their close relatives, the sharks, compose the subclass Elasmobranchii. Rays are the largest group of cartilaginous fishes ...
9.2.3 Batomorphi (Rays) 9.3 Ray-Finned Fish. 9.3.1 Cladistia. 9.3.2 ... This list of sequenced animal genomes contains animal species for which complete genome ...
This list may not reflect recent changes. Batomorphi; A. ... List of threatened rays This page was last edited on 5 February 2019, at 23:26 (UTC). ...
Rajiformes / ˈ r æ dʒ ɪ f ɔːr m iː z / is one of the four orders in the clade Batomorphi, often referred to as the superorder Batoidea, flattened cartilaginous fishes related to sharks. [2] 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 ...
Skates are cartilaginous fish belonging to the family Rajidae in the superorder Batoidea of rays.More than 150 species have been described, in 17 genera. [2] Softnose skates and pygmy skates were previously treated as subfamilies of Rajidae (Arhynchobatinae and Gurgesiellinae), but are now considered as distinct families. [2]
Benthic rays rely entirely on rajiform locomotion. Another difference between the two is the role of the tail. Skates have larger tails with fins on them and they use them during turns. [6] The tails of rays appear to serve no function in swimming. Some rays, known as stingrays have a venomous barb on their tail that they whip around to defend ...
Because rays and sharks are closely related, they are often studied together. In 2010 a global IUCN study of vertebrates found that of 1,044 cartilaginous (ray and shark) species examined, 345 or 33% were threatened with extinction. [6] [7] There are four orders of rays: stingrays, skates, electric rays and sawfishes. Like sharks, rays are ...
Some authors consider it as equivalent to Neoselachii (the crown group clade including modern sharks, rays, and all other descendants of their last common ancestor). Other authors use the name Elasmobranchii for a broader branch-based group of all chondrichthyans more closely related to modern sharks and rays than to Holocephali (the clade ...