Overview
Vertebrates with jaws including the fishes, amphibians, reptiles, birds and mammals.
Taxonomy
The Infraphylum Gnathostomata is a member of the Subphylum Vertebrata. Here is the complete "parentage" of Gnathostomata:
- Domain: Eukaryota
- eukaryotes
- Kingdom: Animalia
C. Linnaeus, 1758 - animals
- Subkingdom: Bilateria
(Hatschek, 1888) Cavalier-Smith, 1983 - bilaterians
- Branch: Deuterostomia
Grobben, 1908 - Deuterostomes
- Infrakingdom: Chordonia
(Haeckel, 1874) Cavalier-Smith, 1998
- Phylum: Chordata
Bateson, 1885 - Chordates
- Subphylum: Vertebrata
Cuvier, 1812 - Vertebrates
- Infraphylum: Gnathostomata auct. - Jawed Vertebrates
- Subphylum: Vertebrata
Cuvier, 1812 - Vertebrates
- Phylum: Chordata
Bateson, 1885 - Chordates
- Infrakingdom: Chordonia
(Haeckel, 1874) Cavalier-Smith, 1998
- Branch: Deuterostomia
Grobben, 1908 - Deuterostomes
- Subkingdom: Bilateria
(Hatschek, 1888) Cavalier-Smith, 1983 - bilaterians
- Kingdom: Animalia
C. Linnaeus, 1758 - animals
The Infraphylum Gnathostomata is further organized into finer groupings including:
- Superclass (2): Osteichthyes · Tetrapoda
- Series (3): Amniota · Atherinomorpha · Percomorpha
- Class (13): Actinopterygii · Agnatha · Amphibia · Aves · Chondrichthyes · Gastropoda · Mammalia · Osteichthyes · Placodermi · Reptilia · Sauropsida · Secernentea · Synapsida
Classes
Actinopterygii
The Actinopterygii (), or ray-finned fishes, constitute a class or sub-class of the bony fishes. [more]
Agnatha
Amphibia
A Class in the Kingdom Animalia.[1] [more]
Aves
A Class in the Kingdom Animalia.[2] [more]
Chondrichthyes
Chondrichthyes (; from Greek ???d?- chondr- 'cartilage', ????? ichthys 'fish') or cartilaginous fishes are jawed fish with paired fins, paired nares, scales, two-chambered hearts, and skeletons made of cartilage rather than bone. The class is divided into two subclasses: Elasmobranchii (sharks, rays and skates) and Holocephali (chimaeras, sometimes called ghost sharks, which are sometimes separated into their own class). [more]
Gastropoda
The Gastropoda or gastropods, more commonly known as snails and slugs, are a large taxonomic class within the phylum Mollusca. The class Gastropoda includes snails and slugs of all kinds and all sizes from microscopic to quite large. There are huge numbers of sea snails and sea slugs, as well as freshwater snails and freshwater limpets, and land snails and land slugs. [more]
Mammalia
A Class in the Kingdom Animalia.[3] [more]
Osteichthyes
Osteichthyes (), also called bony fish, are a taxonomic group of fish that have bony, as opposed to cartilaginous, skeletons. The vast majority of fish are osteichthyes, which is an extremely diverse and abundant group consisting of over 29,000 species. It is the largest class of vertebrates in existence today. Osteichthyes is divided into the ray-finned fish (Actinopterygii) and lobe-finned fish (Sarcopterygii). The oldest known fossils of bony fish are about 420 million years ago, which are also transitional fossils, showing a tooth pattern that is in between the tooth rows of sharks and bony fishes. [more]
Placodermi
Placodermi (from the Greek p??? = plate and d???a = skin, literally "plate-skinned") is a class of armoured prehistoric fish, known from fossils, which lived from the late Silurian to the end of the Devonian Period. Their head and thorax were covered by articulated armoured plates and the rest of the body was scaled or naked, depending on the species. Placoderms were among the first jawed fish; their jaws likely evolved from the first of their gill arches. A 380-million-year-old fossil of one species represents the oldest known example of live birth. [more]
Reptilia
Reptiles (Reptilia) are members of a group of air-breathing, ectothermic (cold-blooded) vertebrates which are characterized by laying shelled eggs (except for some vipers and constrictor snakes that give live birth), and having skin covered in scales and/or scutes. They are tetrapods, either having four limbs or being descended from four-limbed ancestors. Modern reptiles inhabit every continent with the exception of Antarctica. Reptiles originated around 320-310 million years ago during the Carboniferous period, having evolved from advanced reptile-like amphibians that became increasingly adapted to life on dry land. Four living orders are typically recognized: [more]
Sauropsida
Sauropsida ("lizard faces") is a group of amniotes that includes all existing reptiles and birds and their fossil ancestors, including the dinosaurs, the immediate ancestors of birds. Sauropsida is distinguished from Synapsida, which includes mammals and their fossil ancestors. [more]
Secernentea
Secernentea are the main class of nematodes, characterised by numerous and an excretory system possessing lateral canals. Like all nematodes, they have no circulatory or respiratory system. [more]
Synapsida
At least 4 species and subspecies belong to the Class Synapsida.
More info about the Class Synapsida may be found here.
Bibliography
- Davies and Guiler, Proc. Zool. Soc. London, 129: 579
- Perrucci S, Rossi G, Macchioni G, The Journal of eukaryotic microbiology.;45(2):198-201.
Footnotes
- http://www.ubio.org/browser/details.php?namebankID=31321
- http://www.ubio.org/browser/details.php?namebankID=21646
- http://www.ubio.org/browser/details.php?namebankID=105958
Sources
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