Berger H. (2006) Monograph of the Urostyloidea (Ciliophora, Hypotricha). Monogr. Biol. 85: i–xv, 1–1303

Chen X., Huang J., Song W. (2011) Ontogeny and phylogeny of Metaurostylopsis cheni sp. n. (Protozoa, Ciliophora), with estimating the systematic position of Metaurostylopsis. Zool. Scr. 40: 99–111

Foissner W. (1991) Basic light and scanning electron microscopic methods for taxonomic studies of ciliated protozoa. Eur. J. Protistol. 27: 313–330

Hall T. (1999) BioEdit: a user-friendly biological sequence alignment editor and analysis program for Windows 95/98/NT. Nucleic Acids Symposium Series 41: 95–98

Jeanmougin F., Thompson J. D., Gouy M., Higgins D. G., Gibson T. J. (1998) Multiple sequence alignment with Clustal X. Trends Biochem. Sci. 23: 403–405

Kahl A. (1932) Urtiere oder Protozoa I: Wimpertiere oder Ciliata (Infusoria) 3. Spirotricha. Tierwelt Dtl. 25: 399–650

Kimura M. (1980) A simple method for estimating evolutionary rates of base substitutions through comparative studies of nucleotide sequences. J. Mol. Evol. 16: 111–120

Kumar S., Tamura K., Nei M. (2004) MEGA3: Integrated software for molecular evolutionary genetics analysis and sequence alignment. Brief. Bioinform. 5: 150–163

Lei Y., Choi J. K., Xu K., Petz W. (2005) Morphology and infraciliature of three species of Metaurostylopsis (Ciliophora, Stichotrichia): M. songi n. sp., M. salina n. sp., and M. marina (Kahl 1932) from sediments, saline ponds, and coastal waters. J. Eukaryot. Microbiol. 52: 1–10

Lynn D. H. (2008) The ciliated protozoa: Characterization, classification, and guide to the literature. Springer, New York

Medlin L., Elwood H. J., Stickel S., Sogin M. L. (1988) The characterization of enzymatically amplified eukaryotic 16S-like rRNA-coding regions. Gene 71: 491–499

Petz W. (2005) Ciliates. In: Antarctic marine protists, (Eds. F. J. Scott, H. J. Marchant). Canberra, Australian Biological Resources Study, 347–448

Petz W., Song W., Wilbert N. (1995) Taxonomy and ecology of the ciliate fauna (Protozoa, Ciliophora) in the endopagial and pelagial of the Weddell Sea, Antarctica. Stapfia 40: 1–223

Shao C., Song W., Al-Rasheid K. A. S., Yi Z., Chen X., Al-Farraj S. A., Al-Quraishy S. A. (2008) Morphology and infraciliature of two new marine urostylid ciliates: Metaurostylopsis struederkypkeae n. sp. and Thigmokeronopsis stoecki n. sp. (Ciliophora, Hypotrichida) from China. J. Eukaryot. Microbiol. 55: 289–296

Song W., Petz W., Warren A. (2001) Morphology and morphogenesis of the poorly-known marine urostylid ciliate, Metaurostylopsis marina (Kahl, 1932) nov. gen., nov. comb. (Protozoa, Ciliophora, Hypotrichida). Eur. J. Protistol. 37: 63–76

Song W., Wilbert N. (2002) Faunistic studies on marine ciliates from the Antarctic benthic area, including descriptions of one epizoic form, 6 new species and, 2 new genera (Protozoa: Ciliophora). Acta Protozool. 41: 23–61

Song W., Wilbert N., Li L., Zhang Q. (2011) Re-evaluation on the diversity of the polyphyletic genus Metaurostylopsis (Ciliophora, Hypotricha): Ontogenetic, morphologic, and molecular data suggest the establishment of a new genus Apourostylopsis n. g. J. Eukaryot. Microbiol. 58: 11–21

Sonnenberg R., Nolte A. W., Tautz D. (2007) An evaluation of LSU rDNA D1-D2 sequences for their use in species identification. Front. Zool. 4: 6

Wilbert N., Song W. (2005) New contributions to the marine benthic ciliates from the Antarctic area, including description of seven new species (Protozoa, Ciliophora). J. Nat. Hist. 39: 935–973

Wilbert N., Song W. (2008) A further study on littoral ciliates (Protozoa, Ciliophora) near King George Island, Antarctica, with description of a new genus and seven new species. J. Nat. Hist. 42: 979–1012

Yi Z. Z., Song W. B. (2011) Evolution of the order Urostylida (Protozoa, Ciliophora): New hypotheses based on multi-gene information and identification of localized incongruence. PLoS ONE 6