Ascidiacea


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Related to Ascidiacea: Larvacea, Thaliacea

Ascidiacea

[ə‚sid·ē′āsh·ē·ə]
(invertebrate zoology)
A large class of the phylum Tunicata; adults are sessile and may be solitary or colonial.
References in periodicals archive ?
2001), the snails, Adelomelon ancilla and Odontocymbiola magellanica, retained during the process on board due to their large size, and Ascidiacea.
The taxa comprise Annelida Polychaeta (17), Ascidiacea (24), Bryozoa (36), Cnidaria (27), Crustacea (20), Entoprocta (2) and Mollusca (16).
The fifteen introduced species are Polychaetes (Branchiomma luctuosum), Ascidiacea (Clavelina oblonga, Distaplia stylifera, Aplidiopsis sp.
In this study, Ascidiacea has the greatest number of introduced species, followed by Cirripedia, and Bivalvia.
The tailed urodele larva is probably the ancestral mode in Molgulidae, because tailed urodele larval development is highly conserved across the Ascidiacea and the tadpole larva has been lost in only two other non-mogulid taxa, in another stolidobranch ascidian family, the Styelidae (15, 16).
The subphylum Urochordata (or Tunicata) of the phylum Chordata includes three classes: Ascidiacea, Thaliacea, and Appendicularia.