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

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

Palliobranchiate :: Palliobranchiate (a.) Having the pallium, or mantle, acting as a gill, as in brachiopods..

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

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

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

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

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

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

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

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

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

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..

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.

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

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

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

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

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.

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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