SHAYLER, Hannah A., & Peter A. SIVER 2004 (May) Description of a new species of the diatom genus Brachysira (Bacillariophyta), Brachysira gravida sp. nov. from the Ocala Nationmal Forest, Florida, U.S.A. Nova Hedwigia 78(3/4): 399-409, 33 figs., 1 table