anascan


anascan
n. [Gr. an, without; askos, sac]
(BRYOZOA: Gymnolaemata)
Cheilostomata in which the autozooids have a hydrostatic system including the flexible part of the frontal wall, thus lacking an ascus.

Online Dictionary of Invertebrate Zoology. . 2005.

Look at other dictionaries:

  • moss animal — bryozoan. [1880 85] * * * ▪ invertebrate Introduction also called  bryozoan,         any member of the phylum Bryozoa (also called Polyzoa or Ectoprocta), in which there are about 5,000 extant species. Another 15,000 species are known only from… …   Universalium

  • Orientation bibliographique en zoologie — (taxinomie) Sommaire par ordre alphabétique, et : Voir aussi Amphibia Animal (en général) Annelida Arachnida Aves Brachiopoda Bryozoa Cephalochordata Chaetognatha Chelonia Chondrichthyes Cnidaria Croco …   Wikipédia en Français

  • Orientation bibliographique en zoologie (taxinomie) — Sommaire par ordre alphabétique, et : Voir aussi Amphibia Animal (en général) Annelida Arachnida Aves Brachiopoda Bryozoa Cephalochordata Chaetognatha Chelonia Chondrichthyes Cnidaria Crocodilia Crustacea …   Wikipédia en Français

  • ascus — n.; pl. asci [Gr. askos, bag] (BRYOZOA: Gymnolaemata) In ascophoran cheilostomates, the exterior walled, flexiblefloored, sac beneath the frontal shield of an autozooid; see anascan …   Dictionary of invertebrate zoology

  • cryptocystidean — n. [Gr. kryptos, hidden; kystis, bladder] (BRYOZOA) Autozooids of anascan or ascophoran cheilostomates bearing frontal shields (cryptocysts) formed by calcification of the internal body walls grown into body cavities subparallel to and beneath… …   Dictionary of invertebrate zoology

  • scutum — n.; pl. scuta [L. scutum, shield] 1. Any long, horny or chitinous plate. 2. (ARTHROPODA: Chelicerata) In Acari, the large, anteriodorsal sclerite. 3. (ARTHROPODA: Crustacea) In thoracic barnacles, a paired plate or valve. a. In Lepadomorpha, one… …   Dictionary of invertebrate zoology


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