tunicate

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Related to Urochordata: Cyclostomata, Cephalochordata

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 ?
Apoptosis and pattern of Bcl-2 and Bax expression in the alimentary tract during the colonial blastogenetic cycle of Botryllus schlosseri (Urochordata, Ascidiacea).
The Ascidians, commonly called sea squirts (Subphylum: Urochordata, Class Ascidiacea) are dominant organisms in many marine communities, having a wide geographic distribution [32].
1 Urochordata [Ascidians (Tunicates or Sea Squirts), Larvaceans (Appendicularians), Thaliaceans (Salps, Doliolids, and Chain Tunicates)]
Enzyme electrophoretic evidence for the prevalence of outcrossing in the hermaphroditic brooding ascidian Dendrodoa grossularia (Chordata, Urochordata).
The class Larvacea is the most specialized in the subphylum Urochordata, or Tunicata, and contains some 70 species.
Interleukin- and TNF-like molecules have been identified in Annelida, Echinodermata, and Urochordata (Beck and Habicht, 1991).
0,2 0,4 ECHINODERMATA Holothuroidea Athyonidium chilensis (Semper, 1868) (1) 0,4 0,5 Echinoidea Tetrapygus niger (Molina, 1782) (1) 0,4 1,0 Loxechinus albus (Molina, 1782) (1) 0,3 0,7 Asteroidea Heliasther helianthus (Lamarck, 1816) (1) 0,1 0,3 Meyenaster gelatinosus (Meyen, 1834) (1) Stichaster striatus Muller & Troschel, 1840 (1) 0,2 0,4 UROCHORDATA Ascidiacea Pyura chilensis Molina, 1782 1,0 1,5 Ascidiacea indet.
For statistical comparisons among groups, prey items were grouped into the following major taxonomical groups: Sipuncula, Annelida, Crustacea, Mollusca, Echinodermata, Chondrichthyes, Teleostei, Urochordata, as well as unidentified material.
He described laboratory crosses in which eggs of a tunicate (Ascidia mentula, phylum Urochordata) were inseminated with sperm of a sea urchin (Echinus esculentus, phylum Echinodermata) in seawater (Williamson 1992).
The biology and functional morphology of Modiolarca subpicta (Bivalvia: Mytilidae: Musculinae), epizoically symbiotic with Ascidiella aspersa (Urochordata: Asicidiacea), from the Kattegat, northern Jutland,