ascidian

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Related to Ascidiacea: Larvacea, Thaliacea

ascidian

any PROTOCHORDATE of the class Ascidiacea (subphyllum Tunicata), such as the sea squirt, the adults of which are degenerate and sedentary. See also APPENDICULARIA.
Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005
References in periodicals archive ?
Dos nuevos registros de ascidias (Tunicata: Ascidiacea) para la costa continental de Chile.
Biological cycle of Botrylloides leachi (Savigny) (Ascidiacea) in the Venetian lagoon.
Location(s) Solitary or Taxon collected Colonial Phylum Chordata Subphylum Tunicata Class Ascidiacea Order Aplousobranchia Family Didemnidae Didemnum psammathodes b Colonial Didemnum duplicatum b, c Colonial Diplosoma listerianum b Colonial Lissoclinum fragile a, b Colonial Family Polyclinidae Polyclinum constellatum b, e Colonial Family Clavelinidae Clavelina oblonga d Colonial Order Phlebobranchia Family Perophoridae Perophora sp.
Taxonomic experts contributed their much valued knowledge, among them: Dennis Gordon (NIWA) Bryozoa; Ron Thow (University of Canterbury) and Mike Page (NIWA) Porifera and Ascidiacea; and Ken Grange (NIWA) Cnidaria and Mollusca.
The evolution and distribution of Australian tropical Ascidiacea. Pp.
Reproductive strategies in the sea squirts, Perophoridae (Ascidiacea).
Only 5% of the total mass of Ascidiacea (sea squirts) came from the channel.
3 11.1 2.9 Sinum cymba (eggs) 3 11.1 4.6 Portunidae 5 18.5 0.9 Penaeidae 1 3.7 0.1 Arthropoda Hepatus chilensis 3 11.1 0.6 Acanthonyx petiverii 1 3.7 0.1 Cronius ruber 2 7.4 0.4 Pseudosquillopsis 5 18.5 3.6 lessoni Actinopterygii 4 14.8 1.4 Ascidiacea 2 7.4 2.2 Odontesthes 1 3.7 1.3 regia (eggs) Pyrosoma sp.
Colonies of Botryllus schlosseri (Tunicata, Ascidiacea) were collected near Chioggia, in the southern part of the Lagoon of Venice.