Actinopterygii (/ ˌæktɪnɒptəˈrɪdʒiaɪ /; from Ancient Greek ἀκτίς (aktis) 'having rays' and 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]

Mar 18, 2025 · The Actinopterygii, or ray-finned fishes, are the largest class of fishes. In existence for about 400 million years, since the Early Devonian, it consists of some 42 orders containing more than 480 families, at least 80 of which are known only from fossils.

Feb 15, 2018 · The group of ray-finned fishes (Class Actinopterygii) encompasses over 20,000 species of fish that have 'rays,' or spines, in their fins. This separates them from the lobe-finned fishes (Class Sarcopterygii, e.g., the l ungfish and coelacanth), which have fleshy fins.

Actinopterygii, is a major taxonomic class (or subclass) of fish, known as the "ray-finned fishes," whose diverse number of species includes about half of all known living vertebrates and 96 percent of all fish species.

Actinopterygians, or ‘ray-finned fishes,’ are the largest and most successful group of fishes and make up half of all living vertebrates.

The Actinopterygii, or ray-finned fishes, are the largest class of fishes. In existence for about 400 million years, since the Early Devonian, it consists of some 42 orders containing more than 480 families, at least 80 of which are known only from fossils.

Actinopterygii are divided into 3 groups: chondrostei (e.g., sturgeon), holostei (e.g., gar), and teleostei (e.g., carp, trout, and halibut). Teleostei are a very diverse group that includes more than 30,000 known species and most of today's living fishes (Litscher & Wassarman, 2015).

In this article we will discuss about the general characters and classification of Actinopterygii. General Characters of Actinopterygii: 1. Body of Actinopterygii is covered by ganoid, cycloid or cten­oid scales. In some cases scales are absent. 2. Generally spiracle is absent in Actinopterygii. 3. External nare is on the top of the head.

Jan 1, 2022 · Actinopterygii is the most diverse group of Chordata, with about 470 families and more than 33,500 extant species. The most ancient fossils known of the group are scales from the Late Silurian.

Actinopterygii (; 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 that comprise over 50% of living vertebrate species.