The 50,000 species of living vertebrates are placed in nine classes: hagfish, lampreys, cartilaginous fish, ray-finned fish , lobe-finned fish, amphibians, reptiles, birds, and mammals.
Do ray-finned fish have vertebrates?
Ray-finned fishes are the dominant aquatic vertebrates today , making up about half of all vertebrate species known. They are found in every aquatic habitat from the abyssal depths of the ocean to freshwater streams and ponds; a few can even crawl on land for short periods of time.
Is a stingray an invertebrate or vertebrate?
Though it is similar in shape to a horseshoe crab, the stingray does indeed have a backbone.
What vertebrate class do fish belong to?
The phylum chordata (animals with backbones) is divided into five common classes: fish, amphibians, reptiles, mammals and birds.
Are ray-finned fishes cartilaginous?
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.
Which one is an example of a ray-finned fish?
The ray-finned fishes include some of the most well-known fish, including tuna, cod, lionfish, and even seahorses .
Are rays vertebrates?
The 50,000 species of living vertebrates are placed in nine classes: hagfish, lampreys, cartilaginous fish, ray-finned fish , lobe-finned fish, amphibians, reptiles, birds, and mammals.
What is the difference between ray-finned fish and lobe-finned fish?
Answer. ❏The ray-finned fish have fin rays, with fins supported by bony spines known as rays. The lobe-finned fish are characterized by fleshy lobed fins, as opposed to the bony fins of the ray-finned fish. There are two types of living lobe-finned fish: the coelacanths and the lungfish.
Does a ray have a backbone?
Stingrays, with their wide, flat bodies, may not look like fish, but they are. They are related to sharks, and like their shark cousins, they do not have bones . Instead, their bodies are supported by cartilage—the same material that you feel inside the tip of your nose.
Are fish vertebrates or invertebrates?
Fish are considered vertebrates (with a backbone), and most fish have scales, fins, and gills. Fish use their gills to breathe, but some types of fish have lungs as well, and can breathe out of water for long periods of time.
What is the classification of a stingray?
Cartilaginous fishesIs stingray a fish or mammal?
Stingrays are a group of sea rays, which are cartilaginous fish related to sharks.
What are vertebrates Class 9?
“Vertebrates are animals that possess a vertebral column and/or notochord at any point in their lives .” One of the ways life is classified is through the presence or absence of the vertebrate.
Which of the following is not class of vertebrates?
The correct answer is Snail. Vertebrates include mammals, birds, fish, amphibians, and reptiles. Snails are invertebrates .
How many classes are under vertebrate?
Knowing the five classes of vertebrates and their characteristics helps you to understand more about these animals. The five classes of vertebrates are listed below.
Do ray-finned fish have an Operculum?
A platelike structure, the operculum, covers the gills; this is not present in most Chondrichthyes (except for chimaeras) . The tail fin of most ray-finned fish, with the exception of sturgeons and paddlefish, is homocercal, nearly symmetrical about the midline.
What are the characteristics of ray-finned fish?
- In vertebrate: Annotated classification. Subclass Actinopterygii (ray-finned fishes) Generally lack choanae; no fleshy base to paired fins; no internal nares; air sacs usually function as swim bladder; skeleton usually well ossified. ...
- In fish: Annotated classification.
Do ray-finned fish have paired fins?
Ray-finned fish have a true vertebral column (or backbone), paired fins , and scales. So what exactly is a “ray-fin?” Ray fins consist of webs of skin tissue supported by flexible, bony rays or spines. These fins are not muscularized, so their movements are dictated by body muscles.
Which is a lobe-finned fish?
The Sarcopterygii, or lobe-finned fishes, is a clade containing the coelacanths, lungfishes, tetrapods, and their fossil relatives, including the osteolepiformes and panderichthyids . They are the sister group to the ray-finned fishes (Actinopterygii), together forming the bony fishes (Osteichthyes).
What did the ray-finned fish evolve from?
Neopterygii (new fins) is a subclass of ray-finned fish that appeared somewhere in the Late Permian. There were only few changes during its evolution from the earlier actinopterygians . Neopterygians are a very successful group of fishes because they can move more rapidly than their ancestors.
Are ray-finned fish tetrapods?
Tetrapods evolved from a finned organism that lived in the water. However, this ancestor was not like most of the fish we are familiar with today. Most animals we call fishes today are ray-finned fishes , the group nearest the root of this evogram.
What type of fish is ray?
ray, any of the cartilaginous fishes of the order Batoidei, related to sharks and placed with them in the class Chondrichthyes . The order includes 534 species. Rays are distinguished from sharks by a flattened, disklike body, with the five gill openings and the mouth generally located on the underside.
In which class of fishes endoskeleton is cartilaginous?
The Chondrichthyes are considered cartilaginous fishes because the long endoskeletal elements called bones in other vertebrates are made of cartilage instead.
How many ray species are there?
How many species of rays and skates have been described? There are approximately 630 different species of rays and skates that are divided into 18 families when scientifically classified.
What is the difference between fish that are classified as Actinopterygii and those classified as Sarcopterygii?
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 . Moreover, the rate of extinction in sarcopterygii is higher in comparison to actinopterygii.
How cartilaginous fishes differ from bony fishes?
What is the difference between bony and cartilaginous fish? Cartilaginous fishes have skeletons composed mostly of cartilage while bony fish have a skeleton composed mostly of bone .
What is the difference between the shape of a ray fin and the shape of a lobe fin?
Ray-fins have bones arranged in a fan shape, while lobe-fins have bony supports .
