Calyptospora-Funduli (Apicomplexa, Calyptosporiadae) in the Liver of the Gulf Toadfish, Opsanus-Beta
Oocysts of the apicomplexan protozoan Calyptospora funduli were found in the liver of a gulf toadfish (Opsanus beta). The infected specimen was 1 of 54 (1.9%) toadfish livers examined histologically. The paraffin-embedded specimen containing the infection as well as similar material from Fundulus similis were processed for scanning electron microscopical (SEM) examination to view diagnostic surface features of C funduli sporocysts. SEM examination confirmed sporopodia and a thin veil surrounding each of the 4 sporocysts per oocyst. Although a single case, the toadfish infection expands the broad host specificity of C funduli to include a host other than an atheriniform fish species.