The subterranean asellids (Caecidotea) of Illinois (Crustacea: Isopoda: Asellidae)

Lewis, Julian J., and Thomas E. Bowman. The Subterranean Asellids (Caecidotea) of Illinois (Crustacea: Isopoda: Asellidae). Smithsonian Contributions to Zoology, number 335, 66 pages, 32 figures, 1981.—The state of Illinois is inhabited by 7 species of subterranean asellid isopods of the genus Caecidotea Packard. Three of these are previously known species, C. kendeighi, C. packardi, and C. stygia; 4 are described as new, C. beattyi, C. lesliei, C. meisterae, and C. whitei. Detailed accounts are given of these species and also of C. antricola, which occurs in Missouri counties adjacent to Illinois; C. tridentata, erroneously reported from Illinois; and the epigean C. spatulata, omitted from Williams' 1970 review of North American epigean species. Each account includes a full synonymy, a review of the species' published history, an illustrated description, and discussions of the habitat and geographic range. Three of the species are characterized as phreatobites, inhabitants of the upper layer of groundwater, and are recorded from drain tiles, ditches, springs, and wells. Four species are troglobites, inhabitants of the more open waters of limestone caves or springs in the Ozark Plateaus and Interior Low Plateaus provinces of western and southern Illinois. OFFICIAL PUBLICATION DATE is handstamped in a limited number of initial copies and is recorded in the Institution's annual report, Smithsonian Year. SERIES COVER OESICN: The coral Montastrea cavemosa (Linnaeus). Library of Congress Cataloging in Publication Data Lewis, Julian J The subterranean Asellids (Caecidotea) of Illinois. (Smithsonian contributions to zoology ; no. 335) Bibliography: p. 1. Asellidae. 2. Crustacea—Illinois. I. Bowman, Thomas E , joint author. II. Title. III. Series: Smithsonian Institution. Smithsonian contributions to zoology • no 335 QL1.S54 no. 335 (QL444.M34] 591s [595.3'72] 80-606896