tunicate

(redirected from urochordate)
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Related to urochordate: Cephalochordata, Cyclostomata

tunicate

or

urochordate

any minute marine chordate of the subphylum Tunicata, containing the sea squirts. They feed by ciliary action and lack a NOTOCHORD, though one is present in the tail of the tadpole larva.
Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005
References in periodicals archive ?
Morphological consequences for multi-partner chimerism in Botrylloides, a colonial urochordate. Dev.
Allorecognition elements on urochordate histocompatibility locus indicate unprecedented extensive polymorphism.
Phagocyte dynamics in a highly regenerative urochordate: insights into development and host defense.
Conservation of the developmental role of Brachyury in notochord formation in a urochordate, the ascidian Halocynthia roretzi.
A morphological study of nonrandom senescence in a colonial urochordate. Biol.
1 A), and both phyla make up the sister group of the chordate phylum, which includes urochordates, cephalochordates, and vertebrates (Castresana et al., 1998; Bromham and Degnan, 1999; Cameron et al., 2000; Furlong and Holland, 2002; Smith et al., 2004; Bourlat et al., 2006).
Urochordate species exhibit diverse forms, including free-swimming, sessile, and colonial.
Here we test the hypothesis that age of a specific developmental stage in the urochordate appendicularian Oikopleura dioica Fol, 1872, can be predicted from the number of endostyle cells and temperature, thus serving as such a reference system.
These authors have hypothesized that CNP is a non-secreted enzyme and differs from those secreted such as serum carnosinase and anserinase, with a limited expression, and that arise by the effect of the second duplication of the gene once the urochordates separated from the vertebrate to evolve as secreted enzymes.
Identification of vitamin K--dependent proteins in the transparent sea squirt, Ciona intestinalis, has demonstrated the presence of a vitamin K--dependent Gla domain before the divergence of vertebrates and urochordates, suggesting new roles for vitamin K in addition to its role in blood coagulation (Kulman et al.
Bach1 is conserved in vertebrates and some urochordates [16].
CYP genes of family 1 are grouped into six subfamilies: CYP1A, CYP1B, CYP1C, CYP1D, CYP1E, and CYP1F, from these 1E and 1F are found in urochordates; 1A, 1B, 1C, and 1D are found in fish and amphibians; in mammals the subfamilies that are mainly distributed are 1A and 1B and in some cases 1D [9,17].