ascidian

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Related to Ascidians: Urochordata, Bryozoans, Tunicates

ascidian:

see ChordataChordata
, phylum of animals having a notochord, or dorsal stiffening rod, as the chief internal skeletal support at some stage of their development. Most chordates are vertebrates (animals with backbones), but the phylum also includes some small marine invertebrate animals.
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; tunicatetunicate
, marine animal of the phylum Chordata, which also includes the vertebrates. The adult form of most tunicates (also called urochordates) shows no resemblance to vertebrate animals, but such a resemblance is evident in the larva.
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References in periodicals archive ?
The location of hemopoiesis in ascidians is still debated, which might be a consequence of the variety of developmental strategies observed among this clade (Brown and Swalla, 2012).
2011) A maternal factor unique to ascidians silences the germline via binding to P-TEFb and RNAP II regulation.
2012) studied 10 species of ascidians from southern India in a seasonal assessment, and found concentrations of hydrosoluble protein fluctuating from 3.
Ascidians and bryozoans were attached to the panel in a greater proportion (Fig.
Biofouling deterrent natural product from the ascidian Distaplia nathensis.
The freshly collected ascidians each 100 gms in wet weight were soaked in methonal, dichloromethane, ethanol, acetone, chloroform, n-butanol, ethyl acetate and diethyl ether at the site of collection until workup.
Sections of the gravel substrate contain dense patches of sponges, hydroids, bushy and encrusting bryozoans, colonial ascidians, and the lacy tubeworm (Filograna implexa) (Collie et al.
certain colonial ascidians (Didemnidae) and named Prochloron didemni,
Natural products effective against certain cancers have been identified: bryostatin from the colonial bryozoan, ecteinascidin from ascidians or sea squirts, and discodermolide from deep-sea sponges.
The ascidians of South Padre Island, Texas were surveyed in August 2004.