Tunicata Tu`ni*ca"ta, n. pl. [NL. See {Tunicate}.] (Zo["o]l.) A grand division of the animal kingdom, intermediate, in some respects, between the invertebrates and vertebrates, and in modern classifications considered a subphylum of the vertebrates; called also urochordata. They were formerly classed with acephalous mollusks. The body is usually covered with a firm external tunic, consisting in part of cellulose, and having two openings, one for the entrance and one for the exit of water. The pharynx is usually dilated in the form of a sac, pierced by several series of ciliated slits, and serves as a gill. [1913 Webster]

Note: Most of the species when mature are firmly attached to foreign substances, but have free-swimming larv[ae] which are furnished with an elongated tail and somewhat resemble a tadpole. In this state the larva has a urochord and certain other structures resembling some embryonic vertebrates. See {Ascidian}, {Doliolum}, {Salpa}, {Urochord}, and Illust. of {Social ascidian}, under {Social}. [1913 Webster]

The Collaborative International Dictionary of English. 2000.

Look at other dictionaries:

  • Tunicata — Tunicata, so v.w. Seescheiden …   Pierer's Universal-Lexikon

  • Tunicata —   [zu Tunica], die Manteltiere …   Universal-Lexikon

  • Tunicata — Tunicata, Manteltiere, ca. 2100 marine, meist sessile Arten umfassender Unterstamm der ⇒ Chordata. Eine Chorda dorsalis sowie ein Neuralrohr mit Gehirn sind bei ihnen nur im Larval bzw. Embryonalstadium ausgeprägt. Der 0,10–30 cm lange, sack oder …   Deutsch wörterbuch der biologie

  • Tunicata — Urochordés …   Wikipédia en Français

  • Tunicata — Manteltiere Seescheiden (Ascidiacea) Systematik Reich: Vielzellige Tiere (Metazoa) …   Deutsch Wikipedia

  • Tunicata — ? Оболочники Асцидии Научная классификация Царство: Животные Подраздел: Вторичноротые …   Википедия

  • Tunicata — noun tunicates • Syn: ↑Urochordata, ↑subphylum Urochordata, ↑Urochorda, ↑subphylum Urochorda, ↑subphylum Tunicata • Hypernyms: ↑phylum • Member Holonyms: ↑ …   Useful english dictionary

  • Tunicata — Tu·ni·ca·ta (too″nĭ kaґtə) [L. “clothed with a tunic”] Urochordata …   Medical dictionary

  • tunicata —   L. thin, separable covering; ata, possessing. Leaf sheaths loose about culm …   Etymological dictionary of grasses

  • tunicata — tu·ni·ca·ta …   English syllables

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