Gnathostomata
Gnathostomata
1. A superclass of jawed vertebrates that includes the fishes, Amphibia, Reptilia, Aves, and Mammalia. Recently it has been proposed that Gnathostomata should comprise the Elasmobranchii (sharks, rays, etc.) and the Teleostomi (i.e. Osteichthyes and Sarcopterygii). In this classification Pisces becomes redundant.
2. (phylum Echinodermata, class Echinoidea) A superorder of echinoids in which the periproct is outside the apical system, there are no compound ambulacral plates, an Aristotle's lantern and girdle are present, and the teeth are keeled. It includes the orders Holectypoida and Clypeasteroida.
1. A superclass of jawed vertebrates that includes the fishes, Amphibia, Reptilia, Aves, and Mammalia. Recently it has been proposed that Gnathostomata should comprise the Elasmobranchii (sharks, rays, etc.) and the Teleostomi (i.e. Osteichthyes and Sarcopterygii). In this classification Pisces becomes redundant.
2. (phylum Echinodermata, class Echinoidea) A superorder of echinoids in which the periproct is outside the apical system, there are no compound ambulacral plates, an Aristotle's lantern and girdle are present, and the teeth are keeled. It includes the orders Holectypoida and Clypeasteroida.
Gnathostomata
Gnathostomata
1. Superclass comprising all vertebrates with true jaws.
2. (phylum Echinodermata, class Echinoidea) Superorder of echinoids, in which the periproct is outside the apical system, there are no compound ambulacral plates, a lantern (see ARISTOTLE'S LANTERN) and girdle are present, and the teeth are keeled. It includes the orders Holectypoida (Jurassic–Recent), and Clypeasteroida (sand dollars, Palaeocene—Recent).
1. Superclass comprising all vertebrates with true jaws.
2. (phylum Echinodermata, class Echinoidea) Superorder of echinoids, in which the periproct is outside the apical system, there are no compound ambulacral plates, a lantern (see ARISTOTLE'S LANTERN) and girdle are present, and the teeth are keeled. It includes the orders Holectypoida (Jurassic–Recent), and Clypeasteroida (sand dollars, Palaeocene—Recent).
Gnathostomata
Gnathostomata A subphylum or superclass of chordates consisting of all vertebrates that possess jaws. It contains six extant classes: Chondrichthyes (cartilaginous fishes), Osteichthyes (bony fishes), Amphibia, Reptilia, Aves (birds), and Mammalia. Compare Agnatha.
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Pisces , Pis·ces / ˈpīsēz/ 1. Astron. a large constellation (the Fish or Fishes), said to represent a pair of fish tied together by their tails. ∎ [as genitiv… Actinopterygians , Holostei Group of marine and fresh water bony fish including many fossil species, e.g. Lepidotes (Triassic—Cretaceous), and Dapedius (Jurassic). Holo… garfish , garfish •raffish • damselfish •catfish, flatfish •garfish, starfish •redfish •elfish, selfish, shellfish •devilfish •crayfish, waifish •stiffish • ki… Sarcopterygians , Crossopterygii (class Osteichthyes) Subclass of bony fish comprising both fossil and living lobe-finned or tassel-finned fish, including the Coelacan… Ichthyology , Ichthyology is the branch of zoology (the study of animals) that deals with fish. It includes the study of the development, anatomy (structure), phys… Fossil fishes , Acanthodii (acanthodians) Class of primitive, fossil fish, characterized by the presence of a true bony skeleton (see BONE), a heterocercal tail fin,…
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