(full paper is archived in the Miller Library)
Title: Studies on the larval stages of the barnacle Balanus glandula Darwin, 1854, Balanus tintinnabulum (Linnaeus, 1758), Chthamalus dalli Pilsbury, 1916, and Pollicipes polymerus (Sowerby, 1833)
Student Author(s): Snodgrass, John B.
Faculty Advisor(s): Abbott, Donald P.
Location: Final Papers Biology 175H
Date: June 1967
Abstract: B. glandula and P. polymerus were raised in vitro from hatching to the fourth instar nauplius and C. dalli from hatching to settlement of the cypris. B. tintinnabulum was raised through stage III. Cultures were maintianed at room temperature and fed on a diet of Platymonas sp.. Larval size, shape, and details of the tail and appendages are presented for all species and all stages observed. Definite differences between instars, and between species at the same instar, permit identification of species and stage of development. Setation formulae, particularly of the antennule, though of limited value for distinguishing different species, proved good indicators of specific instars. Body shape and tail morphology provide the most useful characteristics for species recognition.