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Brachiopoda   Listen
noun
Brachiopoda  n.  (Zool.) A class of Molluscoidea having a symmetrical bivalve shell, often attached by a fleshy peduncle. Note: Within the shell is a pair of "arms," often long and spirally coiled, bearing rows of ciliated tentacles by which a current of water is made to flow into the mantle cavity, bringing the microscopic food to the mouth between the bases of the arms. The shell is both opened and closed by special muscles. They form two orders; Lyopoma, in which the shell is thin, and without a distinct hinge, as in Lingula; and Arthropoma, in which the firm calcareous shell has a regular hinge, as in Rhynchonella. See Arthropomata.






Collaborative International Dictionary of English 0.48








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"Brachiopoda" Quotes from Famous Books



... BRACHIOPODA.—A class of marine Mollusca, or soft-bodied animals, furnished with a bivalve shell, attached to submarine objects by a stalk which passes through an aperture in one of the valves, and furnished ...
— On the Origin of Species - 6th Edition • Charles Darwin

... born in Edinburgh, May 17, 1817; died 1885. His researches were chiefly connected with the sciences of geology and palaeontology, and were directed especially to the elucidation of the characters, classification, history, geological and geographical distribution of recent and fossil Brachiopoda. On this subject he brought out an important work, 'British Fossil Brachiopoda,' 5 vols. 4to. (Cooper, 'Men of the Time,' 1884.)) Down, ...
— The Life and Letters of Charles Darwin, Volume II • Francis Darwin

... systematic treatment of species: those transitions of one species into another, which he asks to see, abound on all sides, as is well known to every systematic naturalist. Only consider, for example, the genera of Rubus and Salix among the living plants of the present period, and the Ammonites and Brachiopoda among extinct animals. Hence, too, Virchow can have no independent views as to the historical development of the higher from the lower animals, because the abundant living forms of the lower animals are almost unknown ...
— Freedom in Science and Teaching. - from the German of Ernst Haeckel • Ernst Haeckel

... statement is received as true, it must be remembered that there is some diversity of structure in this lower division, and that the earliest molluscs are not the lowest, but the highest in the division. The most important point, however, is, that while Brachiopoda were most abundant, the highest molluscs existed also, their remains being found in the Bala limestone, which is the lowest bed of molluscous fossils. (See Silurian System, p. 308.) The number of these higher species ...
— The Christian Foundation, Or, Scientific and Religious Journal, Volume I, No. 7, July, 1880 • Various



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