WebMar 26, 2024 · The class Chondrichthyes comprises squalomorph sharks, galeomorph sharks, batoids (rays), and holocephalans (chimaeras) in 14 taxonomic orders of extant … WebJan 17, 2024 · This fishery operates over a wide bathymetric range (50–800 m), exploiting different communities 21 and thus involving a large number of species in the catches, which include bony fishes ...
Chondrichthyes- Introduction, Classification, Examples and …
WebChondrichthyes is divided into two subclasses; of which Elasmobranchii includes skates, rays, and sharks. Skates are the most diverse elasmobranch group, comprising over 20% of the known species. The number of species is likely to increase as taxonomic issues are resolved and new species are identified. [6] All chondrichthyans breathe through five to seven pairs of gills, depending on the species. In general, pelagic species must keep swimming to keep oxygenated water moving through their gills, whilst demersal species can actively pump water in through their spiracles and out through their gills. However, this is … See more Chondrichthyes is a class that contains the cartilaginous fishes that have skeletons primarily composed of cartilage. They can be contrasted with the Osteichthyes or bony fishes, which have skeletons primarily composed of See more Fertilization is internal. Development is usually live birth (ovoviviparous species) but can be through eggs (oviparous). Some rare species are See more • Note: Lines show evolutionary relationships. See more • Taxonomy of Chondrichthyes • Images of many sharks, skates and rays on Morphbank See more Skeleton The skeleton is cartilaginous. The notochord is gradually replaced by a vertebral column … See more Cartilaginous fish are considered to have evolved from acanthodians.The discovery of Entelognathus and several examinations of acanthodian characteristics indicate that bony fish evolved … See more • List of cartilaginous fish • Cartilaginous versus bony fishes • Largest cartilaginous fishes See more paleo 30
Historical and ecological drivers of the spatial pattern of ... - PLOS
WebApr 11, 2024 · Chondrichthyes is subdivided into two subclasses: Elasmobranchii- Sharks and rays, skates, sawfishes Holocephali- Chimaeras, also known as ghost sharks. Class … WebAs of 7 November 2015, the number of species totals 1188, comprising 16 orders, 61 families and 199 genera. WebJan 11, 2024 · Chondrichthyes is a taxonomic superclass of the phylum Chordata (chordates) that contains fish with cartilaginous skeletons. They are usually fish that live … ウブロ ガラス 傷