Urochordata


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Related to Urochordata: Cyclostomata, Cephalochordata

Urochordata

[¦yu̇r·ə·kȯr′däd·ə]
(invertebrate zoology)
The equivalent name for Tunicata.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Urochordata

 

a subphylum of chordate animals; synonym of Tunicata; members of the subphylum have a notochord in the larval stage of development (hence the name).

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
References in periodicals archive ?
Brachyury (T) gene expression and notochord development in Oikopleura longicauda (Appendicularia, Urochordata).
Time to first swimming was positively correlated with egg diameter overall and for the Spiralia, Echinodermata, and Urochordata (Table 2).
Fine structure of the photoreceptor and cerebral ganglion of the tadpole larva of Amaroucium constellatum (Verrill) (Subphylum: Urochordata; Class: Ascidiacea).
The phenomenon has been studied in various species in different phyla (e.g., Porifera, Cnidaria, Bryozoa, and Urochordata), and the significance of the fusion and the rejection to survival has been discussed.
In the phylum Chordata, although Hb is nearly universally expressed in members of the subphylum Vertebrata, it has not been identified in any members of the subphyla Urochordata or Cephalochordata.
Ascidians (subphylum Urochordata, class Ascidiacea) are ubiquitous marine animals.
The phylum Chordata consists of the subphyla Urochordata (tunicates), Cephalochordata (amphioxus), and Vertebrata.
In the present study, juveniles of the invertebrate ascidian chordate Molgula pacifica (belonging to the subphylum Urochordata), in which five ectodermal ampullar appendages grow out from the body wall of an early juvenile, were examined for two proteins that are known to be involved in the outgrowth of arthropod and vertebrate limbs.