What animal has a cranium?
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.
Is Frog a craniate?
The eight classes of craniate chordates include Cyclostomata (hagfish and lampreys), Chondrichthyes (sharks and other cartilaginous jawed fish), Osteichthyes (bony fish), Choanichthyes (lungfish), Amphibia (toads, frogs, and salamanders), Reptilia (turtles and lizards), Aves (birds), and Mammalia (mammals).
What is the meaning of Craniata?
Noun. 1. Craniata – fishes; amphibians; reptiles; birds; mammals.
What are the characteristics of Craniata?
The Craniata are characterized by a skull (initially cartilaginous and fibrous), which includes three types of sensory organs derived in ontogeny from ectodermal placodes; that is, thickened patches of the embryonic skin that sink inward toward the brain where they develop into sensory chambers.
What is the example of Craniata?
Hagfish
CephalaspidomorphiLampreysLamprey
Craniate/Lower classifications
What is Craniata in zoology?
A craniate is a member of the Craniata (sometimes called the Craniota), a proposed clade of chordate animals with a skull of hard bone or cartilage. Living representatives are the Myxini (hagfishes), Hyperoartia (including lampreys), and the much more numerous Gnathostomata (jawed vertebrates).
Are starfish Craniates?
No, starfish are not chordates and do not belong to the Chordata phylum, rather they belong to the phylum Echinodermata, a separate pylum only…
What are the 3 groups of Protochordates?
Protochordata are divided into three most important sub-categories based on the kind of notochord they possess, namely Hemichordata, Urochordata and Cephalochordata.
What is the main difference between Protochordates and vertebrates?
Like the remaining subphylum of the chordates, the Vertebrata, the protochordates have a hollow dorsal nerve cord, gill slits, and a stiff supporting rod, the notochord, the forerunner of the backbone. The protochordates differ chiefly from the vertebrates in not having a backbone.
Is Craniata a phylum?
Chordate
Craniate/Phylum