What defines Actinopterygii?

Actinopterygii (ray-finned fishes) Fins supported by rays of dermal bone rather than by cartilage. A group of jawed fishes so diverse that no single definition for them can be derived; better understood by determining the distinctive characters of the primitive members and then tracing their…

Are sharks Actinopterygii?

Actinopterygii (ray-finned fishes) and Elasmobranchii (sharks, skates and rays) represent more than half of today’s vertebrate taxic diversity (approximately 33000 species) and form the largest component of vertebrate diversity in extant aquatic ecosystems.

What is the difference between Actinopterygii and Sarcopterygii?

Sarcopterygii and actinopterygii are two groups of osteichthyans. The key difference between sarcopterygii and actinopterygii relies mainly on their fin structure. Sarcopterygii fish species have lobed fins, while the actinopterygii fish species have ray fins.

Is salmon a teleost?

The teleosts are one of three groups of fish in the class Actinopterygii and are believed to have evolved during the Jurassic period, more than 150 million years ago. A few of the better known teleost fish include tuna, salmon, trout, catfish, eels, flounder, sea horses, cod, herring, carp and anchovies.

Are Actinopterygii tetrapods?

Actinopterygii, members of which are known as ray-finned fishes, is a class or subclass of the bony fishes. Traditionally, it is a class or subclass that excludes Tetrapoda, a group of typically terrestrial vertebrates that descends from lobe-finned fish.

Do Petromyzontida have jaws?

The discussion below, for convenience, separates the modern “cyclostomes” into the class Myxini and class Petromyzontida. The defining features of the living jawless fishes are the lack of jaws and lack of paired lateral appendages (fins).

What is the difference between Actinopterygii and Chondrichthyes?

The actinopterygians, or ray-finned fish, are one of the two major clades of bony fish (Osteichthyes), the other being the lobe-finned fish, or Sarcopterygians. The Chondrichthyes (cartilaginous fish) are the extant sister clade of the Osteichthyes.

What is the key difference between Chondrichthyes and Actinopterygii?

The main difference between Chondrichthyes and Osteichthyes is that the Chondrichthyes is the class of bony fish whose endoskeleton is made up of cartilages whereas Osteichthyes is the class of cartilaginous fish whose endoskeleton is made up of bones.

What type of fish are in class Actinopterygii?

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 lungfish and coelacanth), which have fleshy fins.

What are class Actinopterygii organisms?

Actinopterygiiray-finned fishes
OrderAcipenseriformessturgeons and paddlefishes. OrderAlbuliformesbonefishes. OrderAmiiformesbowfins. OrderAnguilliformeseels. OrderAteleopodiformesjellynose or tadpole fishes.OrderAtheriniformessilversides. OrderAulopiformesgrinners, lizardfishes and allies. OrderBatrachoidiformes.

Is a goldfish an Actinopterygii?

The actinopterygians include the most familiar fish, such as sturgeons, gars, eels, carp, herrings, anchovies, catfishes, goldfishes, piranhas, oarfish, seahorses, bass, cichlids, pickerel, salmon, and trout.

Is Perch a Actinopterygii?

Introduction. The yellow perch, Perca flavens, is an actinopterygian. Besides the sharks and their relatives, there are two groups of living fish-like vertebrates, Actinopterygii, the ray-finned fishes, and Sarcopterygii, which includes the lobe-finned fishes and their tetrapod relatives.

Is a shark a teleost?

They are divided into two broad groups: teleosts, which have a bony skeleton and symmetrical tail and include most familiar fish species, and elasmobranchs, which have a skeleton made of cartilage and include sharks, rays and skates.

Is a lionfish a teleost?

Examples of teleosts from different orders: Royal angelfish (Perciformes), Slender-spined porcupine fish (Tetraodontiformes), Red-bellied piranha (Characiformes), Spotfin lionfish (Scorpaeniformes), Blue catfish (Siluriformes), Northern pike (Esociformes), Sockeye salmon (Salmoniformes), and Leafy seadragon (

Is sturgeon a teleost?

Although sturgeon differ, morphologically, from teleosts in many respects (eg, cartilaginous skeleton, bony scutes on skin, and spiral valve intestine), the two groups share many physiological and endocrinological similarities, either due to ancient, inherited characteristics from a common ancestor or due to convergent