English definition of Spirifer

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Definition of spirifer

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Spiricle (n.) One of certain minute coiled threads in the coating of some seeds. When moistened these threads protrude in great numbers.

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Spirillum :: Spirifer (n.) Any one of numerous species of fossil brachipods of the genus Spirifer, or Delthyris, and allied genera, in which the long calcareous supports of the arms form a large spiral, or helix, on each side..

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

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.