Morphology of Cypretta kawatai Sohn and Kornicker, 1972 (Crustacea, Ostracoda), with a Discussion of the Genus

I. G. Sohn and Louis S. Kornicker. Morphology of Cypretta kawatai Sohn and Kornicker, 1972 (Crustacea, Ostracoda), with a Discussion of the Genus. Smithsonian Contribution to Zoology, number 141, 28 pages, 18 figures, 1973.—All 34 species previously referred to Cypretta are reviewed, and four of these are removed from the genus because they lack the characteristic anterior septate margins. The morphology of septa along the anterior margins is discussed and illustrated. The life cycle of C. kawatai was observed in the laboratory, where the species proved to be parthenogenetic. Ontogenetic studies showed the following: in dorsal view the outline changes from pointed ends and greatest width at approximate midlength in early stages to a blunter posterior end and greatest width at a distance of approximately one-third Irom the posterior end in adults; the lateral outline changes from subtriangular in early stages to subovate in adults. The following characters are restricted to adults: septate anterior margins; ventroposterior nodes on the right valve and opposing scalloped structures on the left valve; columns on the anterior margin of both valves that are either superposed on or adjacent to the septa and are present on the ventroposterior margin of the right valve only. A lectotype is designated for Cypretta globulosa (Sharpe, 1910), considered here to be a valid species. OFFICIAL PUBLICATION DATE is handstamped in a limited number of initial copies and is recorded in the Institution's annual report, Smithsonian Year. SI PRESS NUMBER 4771. SERIES COVER DESICN: The coral Montastrea cavernosa (Linnaeus). Library of Congress Cataloging in Publication Data Sohn, Israel Gregory, 1911Morphology of Cypretta kawatai Sohn and Kornicker, 1972 (Crustacea, Ostracoda) . (Smithsonian contributions to zoology, no. 141) 1. Cypretta kawatai. 2. Cypretta. I. Kornicker, Louis S., 1923joint author. II. Title. III. Series: Smithsonian Institution. Smithsonian contributions to zoology, no. 141. QL1.S54 no. 141 [QL444.08] 591'.08s [595'.33] 73-1219 For sale by the Superintendent of Documents, U.S. Government Printing Office, Washington, D.C. 20402 Price: 60 cents, domestic postpaid; 45 cents, GPO Bookstore Morphology of Cypretta kawatai Sohn and Kornicker, 1972 (Crustacea, Ostracoda), with a Discussion of the Genus