Reference

J. Gong, S.-J. Kim, S.-Y. Kim, Gi-Sik Min, D.McL. Roberts, A. Warren, J.K. Choi (2007): Taxonomic redescriptions of two ciliates, Protogastrostyla pulchra n. g., n. comb. and Hemigastrostyla enigmatica (Ciliophora: Spirotrichea, Stichotrichia), with phylogenetic analyses based on 18S and 28S rRNA gene sequences – Journal of Eukaryotic Microbiology – 54: 468 - 478.