WebChondrichthyes (/ k ɒ n ˈ d r ɪ k θ i. iː z /; from Ancient Greek χόνδρος (khóndros) 'cartilage', and ἰχθύς (ikhthús) 'fish') 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 bone tissue. Webray-finned (not comparable) (of fish) In the Actinopterygii taxonomic class of fish, all having in common lepidotrichia (a kind of fin made of webs of skin supported by bony or horny spines). Translations . having lepidotrichia.

Vertebrate - The Definitive Guide Biology Dictionary

WebLearn the definition of 'ray-finned'. Check out the pronunciation, synonyms and grammar. ... In the ray-finned fishes, there has also been considerable modification from the primitive … WebThe group Osteichthyes is characterised by fish species that have skeletons primarily composed of bone and is divided into the ray-finned fish (Actinopterygii) and lobe-finned fish (Sarcopterygii). The structure of the spermatozoa, as in most vertebrates, consists of a head, midpiece and tail (Fig. 2(d)). The spermatic nucleus is elongated. billy joel at fenway 2022

Actinopterygii - New World Encyclopedia

WebThe most diverse group of fish The ray-finned fishes (actinopterygians) are the largest group of living fishes and compose half of the living vertebrates. There are around 42 orders, 431 families and nearly 24,000 species. Almost all fish that you see belong to this class of fish. The most notable exceptions include lampreys, hagfish, lungfish, and coelocanths. Ray … WebFeb 13, 2024 · Definition. Any vertebrate, classified under subphylum Vertebrata, is an animal with a backbone. This group consists of several broad classes: fish, amphibians, … WebRay-finned Fish definition: Any of various fishes belonging to the class Actinopterygii, having fins supported by long rays of bone. The ray-finned fishes are the largest group of … billy joel arlington tx