Reference

Z. Yi, Weibo Song, T. Stoeck, Khaled A. S. AL-Rasheid, A.A. Al-Khedhairy, J. Gong, H. Ma, Z. Chen (2009): Phylogenetic analyses suggest that Psammomitra (Ciliophora, Urostylida) should represent an urostylid family, based on small subunit rRNA and alpha-tubulin gene sequence information – Zool. J. Linnean Soc. – 157: 227 - 236.