1. Berger, H. 1999. Monograph of the Oxytrichida (Ciliophra, Hypotrichia). Monogr. Biol., 78:1-100.
2. Dragesco, J. & Dragesco- Kernéis, A. 1986. Ciliés libres de l'Afrique intertropicale. Faune Tropicale, 26:1-599.
3. Gong, J. , Kim, S. , Kim, S. , Min, G. , Roberts, D. , Warren, A. & Choi, J. 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. J. Eukaryot. Microbiol., 54:468-478.
4. Hill, B. F. 1990. Uronychia transfuga (O. F. Müller, 1786) Stein, 1859 (Ciliophora, Hypotrichida, Uronychidae): cortical structure and morphogenesis during division. J. Protozool., 37:99-107.