WebMar 16, 2024 · chondrichthyan, (class Chondrichthyes), also called chondrichthian, any member of the diverse group of cartilaginous fishes that includes the sharks, skates, rays, and chimaeras. The class is one of the two great groups of living fishes, the other being the osteichthians, or bony fishes. The name Selachii is also sometimes used for the group … WebThe below mentioned article provides a note on the evolution and classification of fishes. Fishes are generally grouped into three broad categories: the placoderms, the cartilaginous fishes and the bony fishes. ... the phylogeny is reconstructed on the basis of shared derived characters that analyze the primitive and derivative characters ...
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WebApr 11, 2024 · The General Characteristics of Chondrichthyes and Osteichthyes. Chondrichthyes and Osteichthyes have the following general characteristics: They both … WebGeneral Characters: 1. Aquatic, either freshwater or marine, herbivorous or carnivorous, cold blooded, oviparous or ovoviviparous vertebrates. 2. Body usually streamlined, … paratie tritone
Design and General Characteristics of Trammel Net for Cuttle Fish …
http://www.animalsworlds.com/characteristic-of-fish.html WebDipnoi (Gr. di-two, pnoe-breathing) is a small order of fresh water bony fishes. They respire by gills and lungs. Dipnoi evolved during Devonian period. They are characterized by short jaws, crushing plate from teeth, internal nares, reduced exo- and endo- skeleton, and diphycercal tail. WebAug 25, 2000 · In general, estimates of trade are rather unreliable and calculations of the annual global import value of the aquarium trade in marine fishes vary greatly, from U.S. $24–40 million both in 1985 (Wood, 1985) and in the late 1990s (Wood, 2001) for fishes plus invertebrates, to U.S. $250 million in the late 1980s (Barratt and Medley, 1990). paratifica