What are the 3 classes of fish in the chordata phylum?
Chordates are divided into three subphyla: Vertebrata (fish, amphibians, reptiles, birds, and mammals); Tunicata or Urochordata (sea squirts, salps); and Cephalochordata (which includes lancelets).
Which group of fish is most abundant today quizlet?
41. The Clupeomorpha (herrings, sardines, etc.) are arguably the most abundant fishes in the world.
What is the most primitive group of fishes?
The first group is the Superclass Agnatha. This group is the most primitive of the three groups of fish.
Which class of chordates contains cartilaginous fish?
Class Chondrichthyes
Class Chondrichthyes ( Cartilaginous fish ) This class includes sharks and rays. They have paired fins for swimming.
What are the different classes of phylum Chordata?
Chordata contains five classes of animals: fish, amphibians, reptiles, birds, and mammals; these classes are separated by whether or not they can regulate their body temperature, the manner by which they consume oxygen, and their method of reproduction.
What are the 4 classes of fish?
Fish form the largest group of vertebrates. There are Four Classes of fish that we lump together though they are only distantly related to each other. The four groups of fishes are: Jawless Fishes (2 classes), Cartilaginous Fishes, and Bony Fishes. Jawless fish have round mouths.
Which of the following is true about the two kinds of bony fish?
Which of the following is true about the two kinds of bony fish? – Lobe-finned fish have fins supported by a series of bones. – Ray-finned fish have fins containing flexible bony elements but not actual bones. – Scientists believe that extinct lobe-finned fish are ancestors of amphibians.
Do bony fish have a vertebral column?
The skeleton of bony fishes is made of bone and cartilage. The vertebral column, cranium, jaw, ribs, and intramuscular bones make up a bony fish’s skeleton.
What phylum and subphylum is the class Osteichthyes under?
bony fish, (superclass Osteichthyes), any member of the superclass Osteichthyes, a group made up of the classes Sarcopterygii (lobe-finned fishes) and Actinopterygii (ray-finned fishes) in the subphylum Vertebrata, including the great majority of living fishes and virtually all the world’s sport and commercial fishes.
What are the characteristics of Osteichthyes?
Key features of Osteichthyes
- Skeleton more or less bony, vertebrae numerous.
- Skin with mucous glands and embedded dermal scales.
- some without scales.
- Paired fins.
- Mouth with many teeth (some toothless).
- jaws present.
- Respiration by gills supported by bony gill arches and covered by a operculum.
Which fish is cartilaginous fish?
Cartilaginous fishes (chondrichthyes) represent the oldest surviving jawed vertebrates and, as the name suggests, have a skeleton made out of cartilage. They include sharks, rays, and skates (elasmobranchii) and chimeras (holocephali).
Which is a bony fish?
Bony fish also comprise virtually all freshwater species living in lakes, rivers, and streams. Sunfish, bass, catfish, trout, and pike are examples of bony fish, as are the freshwater tropical fish that you see in aquariums. Other species of bony fish include: Tuna.
