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Topic: Craniata

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	Craniata
		The Craniata, or craniates, include all animals having a skull (or cranium, hence their name), be it cartilaginous or bony.
		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.
		Janvier, P. The phylogeny of the Craniata, with particular reference to the significance of fossil 'agnathans'.
	tolweb.org /tree?group=Craniata&contgroup=Chordata (2764 words)

	[No title]
		ORGANISM Bos taurus Eukaryota; Metazoa; Chordata; Craniata; Vertebrata; Euteleostomi; Mammalia; Eutheria; Cetartiodactyla; Ruminantia; Pecora; Bovoidea; Bovidae; Bovinae; Bos.
		ORGANISM Gallus gallus Eukaryota; Metazoa; Chordata; Craniata; Vertebrata; Euteleostomi; Archosauria; Aves; Neognathae; Galliformes; Phasianidae; Phasianinae; Gallus.
		ORGANISM Takifugu rubripes Eukaryota; Metazoa; Chordata; Craniata; Vertebrata; Euteleostomi; Actinopterygii; Neopterygii; Teleostei; Euteleostei; Neoteleostei; Acanthomorpha; Acanthopterygii; Percomorpha; Tetraodontiformes; Tetradontoidea; Tetraodontidae; Takifugu.
	ptp.cshl.edu /downloads/ptp_amino_acid_sequence_files/seq_135_vert_ptp_domains_d1_(genpept).gp (6923 words)

	Highbeam Encyclopedia - Search Results for Craniata
		Craniata (kingdom Metazoa, phylum Chordata) The subphylum that comprises animals that have a bony or cartilaginous skull and a dorsal vertebral column.
		Derivatives of neural crest cells give rise to most of the peripheral nervous system, some endocrine glands, pigment cells, and the skeleton and connective tissues of the head.
		Anaspidiformes (subphylum Craniata, class Cephalaspidomorphi) An extinct order of fossil, fish-like vertebrates that are considered to be related to the lampreys (Petromyzoniformes).
	www.encyclopedia.com /SearchResults.aspx?Q=Craniata (253 words)

	Vertebrata
		As for extant vertebrates, the main question is whether lampreys are the sister-group of the gnathostomes, or that of hagfishes.
		In the latter case there would be no reason to distinguish the Vertebrata from the Craniata, as it was formerly done.
		Although there is good evidence for the lamprey-gnathostome sister-group relationship, the theory that the cyclostomes (lampreys,hagfishes) are a clade is still supported by a number of zoologists.
	tolweb.org /tree?group=Vertebrata& (1811 words)

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