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Waldheimia :: Waldheimia (n.) A genus of brachiopods of which many species are found in the fossil state. A few still exist in the deep sea.

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

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

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

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

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

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

Productus :: Productus (n.) An extinct genus of brachiopods, very characteristic of the Carboniferous rocks..

Delthyris :: Delthyris (n.) A name formerly given to certain Silurian brachiopod shells of the genus Spirifer.

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

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.

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

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

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

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

Rhynchonella :: Rhynchonella (n.) A genus of brachiopods of which some species are still living, while many are found fossil..

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

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

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..

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