English definition of Tunicata

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Definition of tunicata

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Tunicata (n. pl.) A grand division of the animal kingdom, intermediate, in some respects, between the invertebrates and vertebrates, and by some writers united with the latter. 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 se

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Tunicated :: Tunicated (a.) Having a tunic, or mantle; of or pertaining to the Tunicata..

Ovicyst :: Ovicyst (n.) The pouch in which incubation takes place in some Tunicata.

Larvalia :: Larvalia (n. pl.) An order of Tunicata, including Appendicularia, and allied genera; -- so called because certain larval features are retained by them through life. Called also Copelata. See Appendicularia..

Thaliacea :: Thaliacea (n. pl.) A division of Tunicata comprising the free-swimming species, such as Salpa and Doliolum..

Tunicata :: Tunicata (n. pl.) A grand division of the animal kingdom, intermediate, in some respects, between the invertebrates and vertebrates, and by some writers united with the latter. 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 se

Ascidioidea :: Ascidioidea (n. pl.) A group of Tunicata, often shaped like a two-necked bottle. The group includes, social, and compound species. The gill is a netlike structure within the oral aperture. The integument is usually leathery in texture. See Illustration in Appendix..

Ascidian :: Ascidian (n.) One of the Ascidioidea, or in a more general sense, one of the Tunicata. Also as an adj..

Endostyle :: Endostyle (n.) A fold of the endoderm, which projects into the blood cavity of ascidians. See Tunicata..

Ascidium :: Ascidium (n.) A genus of simple ascidians, which formerly included most of the known species. It is sometimes used as a name for the Ascidioidea, or for all the Tunicata..

Tunicary :: Tunicary (n.) One of the Tunicata.

Pharyngopneusta :: Pharyngopneusta (n. pl.) A group of invertebrates including the Tunicata and Enteropneusta.

Sublapsarian :: Subkingdom (n.) One of the several primary divisions of either the animal, or vegetable kingdom, as, in zoology, the Vertebrata, Tunicata, Mollusca, Articulata, Molluscoidea, Echinodermata, Coelentera, and the Protozoa; in botany, the Phanerogamia, and the Cryptogamia..

Appendicularia :: Appendicularia (n.) A genus of small free-swimming Tunicata, shaped somewhat like a tadpole, and remarkable for resemblances to the larvae of other Tunicata. It is the type of the order Copelata or Larvalia. See Illustration in Appendix..

Tunicate :: Tunicate (n.) One of the Tunicata.

Acephala :: Acephala (n. pl.) That division of the Mollusca which includes the bivalve shells, like the clams and oysters; -- so called because they have no evident head. Formerly the group included the Tunicata, Brachiopoda, and sometimes the Bryozoa. See Mollusca..

Nucleus :: Nucleus (n.) A visceral mass, containing the stomach and other organs, in Tunicata and some mollusks..

Sea Squirt :: Sea squirt () An ascidian. See Illust. under Tunicata.

Urochorda :: Urochorda (n. pl.) Same as Tunicata.

Desmomyaria :: Desmomyaria (n. pl.) The division of Tunicata which includes the Salpae. See Salpa.

Tethyodea :: Tethyodea (n. pl.) A division of Tunicata including the common attached ascidians, both simple and compound. Called also Tethioidea..