Sohn, I. G.; Kornicker, L. S. (1969). Significance of calcareous noduels in myodopcopid ostracod carapaces. In: J. W. Neale (Ed), Taxonomy, morphology and ecology of Recent Ostracoda. Oliver & Boyd, Edinburgh. 99-108.

174736

Sohn, I. G.; Kornicker, L. S.

1969

99-108

Publication

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The integument of myodocopids is mineralogically different from those in the other ostracod orders (Podocopida, Platycopida, Palaeocopida, and Leperditicopida). The Myodocopida have amorphous calcium carbonate in the shell, the other orders have crystalline calcium carbonate. Spherical, hemispherical, discoidal and anastomosing calcareous nodules, ultramicroscopic to about 0·3 mm in size, form posthumously (less frequently in vivo) in the carapaces of myodocopid ostracods and also in the integuments of other crustacean groups. These artifacts have occasionally been erroneously used as criteria for classification of ostracod species. The following sequence of nodule formation is postulated: amorphous calcium carbonate-monohydrocalcite (CaC03.H20)-calcite. Some nodules resemble statoliths of Mysidacea, Foraminifera, brachiopod sclerites, holothurian plates, spherulites, and oolites. The nodules are a source of calcareous particles in sediments.

Ostracoda

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