What level of classification is fish?

What is the classification of fish in the phylum Craniata?

Fishes and the tetrapods belong to the subphylum Craniata. The remaining fishes and the tetrapods belong to the infraphylum Vertebrata. One order Myxiniformes, with one family, Myxinidae, and 70 species, 3 in Canada (one in Atlantic and 2 in Pacific).

What animals are in the subphylum Craniata?

Mammals, birds, reptiles, amphibians, fish. Subphylum Craniata is one of three subphyla in phylum Chordata, and it’s the biggest of the three. There are 35 animal phyla, and phylum Chordata is the third largest, following Arthropoda and Mollusca.

What is the difference between subphylum Craniata and Chordata?

Subphylum Craniata. The three subphyla in phylum Chordata are Cephalochordata, Urochordata, and Craniata. Subphylum Cephalochordata has 20 species of brainless (literately brainless), tiny chordates known as lancelets. Subphylum Urochordata has about 3000 species of tunicates, which are chordates with a brain but no skull.

What are the different classes of fish?

Within this subphylum, four different classes contain fish, including the Myxini, Cephalspidmomorphi, the Chondrichthyes and the Osteichthyes. These four classes are divided further into numerous families, genera, species and subspecies.

What are craniates in biology?

Craniates (Craniata) are a group of chordates that includes hagfish, lampreys, and jawed vertebrates such as amphibians, birds, reptiles, mammals, and fishes. Craniates are best described as chordates that have a braincase (also called a cranium or a skull), mandible (jawbone) and other facial bones.

How many types of chordates are there in the subphylum Craniata?

Subphylum Urochordata has about 3000 species of tunicates, which are chordates with a brain but no skull. Finally, Subphylum Craniata has about 63,000 species of chordates with a skull. All except hagfish also have a backbone.

What is the subphylum of vertebrates?

Introduction to Subphylum Vertebrate (Craniata): The vertebrates constitute the main subdi­vision of the Phylum Chordata and occupy the highest rank. All the vertebrates or craniates are placed under the Subphylum Vertebrata or Craniata.

What animals have a cranium and no backbone?

Craniates. Most bilaterally symmetrical animals have a head; of these, those that have a cranium compose the clade Craniata. Craniata includes the hagfishes (Myxini), which have a cranium but lack a backbone, and all of the organisms called “vertebrates.”.

What is subphylum Craniata?

Subphylum Craniata is one of three subphyla in phylum Chordata, and it’s the biggest of the three. There are 35 animal phyla, and phylum Chordata is the third largest, following Arthropoda and Mollusca.

What are the similarities and differences between chordates and vertebrates?

Both chordates and vertebrates contain a nerve cord, pharyngeal gill slits, and post-anal tail at some points of their life. The main difference between chordates and vertebrates is that some chordates do not have a vertebral column whereas all vertebrates have a vertebral column.

What are some examples of chordates with a skull?

Finally, Subphylum Craniata has about 63,000 species of chordates with a skull. All except hagfish also have a backbone. Examples of craniates are birds, fish, lampreys, frogs, snakes, crocodiles, gorillas, bears, cats, dogs, and humans.

What is the subphylum of Chordata?

Subphylum Craniata of the phylum Chordata comprises of organisms that possess a prominent cranium. Thus, these organisms possess a brain, skull and jaws. This subphylum is also known as the subphylum Vertebrata. Species belonging to Craniata has a well-developed vertebral column with 10 – 12 pairs of cranial nerves and the brain.

Is a fish a chordate?

A chordate (/ˈk?ːrde?t/) is an animal of the phylum Chordata. Chordates are divided into three subphyla: Vertebrata (fish, amphibians, reptiles, birds, and mammals); Tunicata or Urochordata (sea squirts, salps); and Cephalochordata (which includes lancelets). Moreover, are humans chordates?

What are the characteristics of the subphylum Craniata?

Species belonging to Craniata has a well-developed vertebral column with 10 – 12 pairs of cranial nerves and the brain. They all possess an endoskeleton, and the notochord does not extend beyond the brain. Another unique feature of the subphylum Craniata is the presence of chambered hearts. The number of chambers may differ from class to class.

What are the vertebrates in the phylum Chordata?

The vertebrates constitute the main subdi­vision of the Phylum Chordata. All the verte­brates or craniates are placed under the sub­phylum Vertebrata or Craniata. With the new information to the Zoologists, they are inclined to create more subphyla rather than Vertebrata.

What are the examples of Chordata?

Examples of Phylum Chordata. The examples of phylum Chordata include the following: Lampreys. This chordate belongs to the sub-phylum Vertebrata. It is a fish devoid of jaws and spends its larval stages as a filter-feeder. It gets transformed into a parasite as it grows into an adult. Sea Squirt

What are the three sub phylum of Chordata?

Classification Of Phylum Chordata into three Sub-Phyla The subphylum Urochordata and Cephalochordata are collectively known as protochordates, which are marine animals. They are invertebrates but they share attributes of chordates.

What is a cranium in a fish?

Craniata, including this fish ( Dunkleosteus sp. ), are characterized by the presence of a cranium, mandible, and other facial bones. (credit: “Steveoc 86”/Wikimedia Commons) A cranium is a bony, cartilaginous, or fibrous structure surrounding the brain, jaw, and facial bones (Figure 1).

What are some examples of craniate fish?

Other craniate groups (jawless fishes, sharks and chimeras, the coelacanth, lungfishes) are considerably depauperate, by comparison with their past diversity. The Craniata fall into two major clades, the Hyperotreti, or hagfishes, and the Vertebrata.

What are craniates in hagfishes?

The craniates are characterized by a skull; that is, a complex ensemble of skeletal elements which surrounds the brain and sensory capsules. The skull of hagfishes (top) consists of cartilaginous bars (blue), but the brain is mostly surrounded by a fibrous sheath (yellow) underlain by the notochord (green).

What are the superclasses of Vertebrata and Chordata?

The Subphylum Vertebrata contains two Superclasses, Agnatha and Gnathostomata: Superclass Agnatha contains only two Classes of animals, both of which come under the general term of fish. Superclass Gnathostomata contains six Classes of animals, two of which are also included in the general term of fish. Higher Classification of the Phylum Chordata

What is subphylum Vertebrata?

subphylum: Vertebrata class: Agnatha Chondrichthyes Osteichthyes Amphibia Reptilia Aves Mammalia Three of the vertebrate classes are fish. The most primitive of these is Agnatha. It consists of jawless fish that do not have scales. These are the lampreys and hagfish.

What is the third subphylum of the chordates?

The third subphylum of the chordates is the large and diverse Vertebrata. This monophyletic group shares the basic chordate characteristics with the other two subphyla, but in addition it demonstrates a number of novel homologies that the others do not share.

Are hagfish craniates or vertebrates?

One of these primitive, jawless craniates is a group called the hagfishes, which represent the class Myxini. There are about 40 species found on Earth today, and they really are old! They are craniates, but they aren’t actually considered vertebrates because they don’t have a backbone.