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Psarolepis. Achoania. Actinopterygii (ray-finned fish) Sarcopterygii (lobe-finned fish, including tetrapods) Osteichthyes (/ ˌɒstiːˈɪkθi.iːz /), also known as osteichthyans or commonly referred to as the bony fish, is a diverse superclass of vertebrate animals that have endoskeletons primarily composed of bone tissue.
The bony fish evolved into two separate groups: the Actinopterygii (or ray-finned fish) and Sarcopterygii (which includes the lobe-finned fish). During the Devonian period a great increase in fish variety occurred, especially among the ostracoderms and placoderms, and also among the lobe-finned fish and early sharks.
The modern bony fish, class Osteichthyes, appeared in the late Silurian or early Devonian, about 416 million years ago. Both the cartilaginous and bony fish may have arisen from either the placoderms or the spiny sharks.
Actinopterygii (/ ˌæktɪnɒptəˈrɪdʒiaɪ /; from actino- 'having rays' and Ancient Greek πτέρυξ (ptérux) 'wing, fins'), members of which are known as ray-finned fish or actinopterygians, is a class of bony fish [2] that comprise over 50% of living vertebrate species. [3] They are so called because of their lightly built fins made of ...
Guiyu oneiros is one of the earliest articulated bony fish discovered. Fossils of Guiyu have been found in what is now Qujing, Yunnan, China, in late Silurian marine strata, [ 2] about 425 million years old. [ 1] Guiyu is part of the Xiaoxiang fauna which is rich in fossils representing a marine ecosystem. Found in the late Ludlow -aged Kuanti ...
Characteristics. Guiyu oneiros, the earliest-known bony fish, lived during the Late Silurian, 419 million years ago). [1] It has the combination of both ray-finned and lobe-finned features, although analysis of the totality of its features places it closer to lobe-finned fish. [2][3][4] Early lobe-finned fishes are bony fish with fleshy, lobed ...
The Devonian period is traditionally known as the "Age of Fish", marking the diversification of numerous extinct and modern major fish groups. [7] Among them were the early bony fishes, who diversified and spread in freshwater and brackish environments at the beginning of the period.
By the start of the Early Devonian, 419 million years ago, jawed fishes had divided into three distinct groups: the now extinct placoderms (a paraphyletic assemblage of ancient armoured fishes), the bony fishes, and the clade that includes spiny sharks and early cartilaginous fish. The modern bony fishes, class Osteichthyes, appeared in the ...
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