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Lyopomata :: Lyopomata (n. pl.) An order of brachiopods, in which the valves of shell are not articulated by a hinge. It includes the Lingula, Discina, and allied forms..

Palliobranchiata :: Palliobranchiata (n. pl.) Same as Brachiopoda.

Lingula :: Lingula (n.) Any one of numerous species of brachiopod shells belonging to the genus Lingula, and related genera. See Brachiopoda, and Illustration in Appendix..

Brachiopod :: Brachiopod (n.) One of the Brachiopoda, or its shell..

Brachiopoda :: Brachiopoda (n.) A class of Molluscoidea having a symmetrical bivalve shell, often attached by a fleshy peduncle..

Articulata :: Articulata (v.) One of the subdivisions of the Brachiopoda, including those that have the shells united by a hinge..

Ecardines :: Ecardines (n. pl.) An order of Brachiopoda; the Lyopomata. See Brachiopoda.

Inarticulate :: Inarticulate (a.) Without a hinge; -- said of an order (Inarticulata or Ecardines) of brachiopods.

Orthis :: Orthis (n.) An extinct genus of Brachiopoda, abundant in the Paleozoic rocks..

Molluscoidea :: Molluscoidea (n. pl.) A division of Invertebrata which includes the classes Brachiopoda and Bryozoa; -- called also Anthoid Mollusca.

Deltidium :: Deltidium (n.) The triangular space under the beak of many brachiopod shells.

Pentamerus :: Pentamerus (n.) A genus of extinct Paleozoic brachiopods, often very abundant in the Upper Silurian..

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..

Spermatophore :: Spermatophore (n.) A capsule or pocket inclosing a number of spermatozoa. They are present in many annelids, brachiopods, mollusks, and crustaceans. In cephalopods the structure of the capsule is very complex..

Footstalk :: Footstalk (n.) The peduncle or stem by which various marine animals are attached, as certain brachiopods and goose barnacles..

Orthid :: Orthid (n.) A brachiopod shell of the genus Orthis, and allied genera, of the family Orthidae..

Crania :: Crania (n.) A genus of living Brachiopoda; -- so called from its fancied resemblance to the cranium or skull.

Testicardines :: Testicardines (n. pl.) A division of brachiopods including those which have a calcareous shell furnished with a hinge and hinge teeth. Terebratula and Spirifer are examples.

Divaricator :: Divaricator (n.) One of the muscles which open the shell of brachiopods; a cardinal muscle. See Illust. of Brachiopoda.

Malacozoa :: Malacozoa (n. pl.) An extensive group of Invertebrata, including the Mollusca, Brachiopoda, and Bryozoa. Called also Malacozoaria..

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