The rotifers, A. brightwelli and A. herricki were surveyed under SEM and TEM. The overall external features were compared under SEM to determine significant differences in morphology. The widths of the coronal surface and midsection were larger in A. herricki than that of A. brightwelli. A. herricki was prepared for view under E M , and integument was compared to A. brightwelli. The integument of A. brightwelli was substantially thicker than that of A. herricki, which disagreed with the hypothesis. Further studies must be conducted to determine the nature of this difference.
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Hecimovich, Nichole M., "Transmittance Electron Microscopy: A Comparison of the Rotifers Asplanchna herricki and Asplanchna brightwelli" (1995). Honors Theses, 1963-2015. 751.