Boshko, Elena G., and Lyudmila A. Konstantynenko. 2009. “A New Species of Pachytrocha Kent, 1882 (Ciliophora, Peritrichia: Vaginicolidae)”. Zootaxa 2198 (1). Auckland, New Zealand:61–66. https://doi.org/10.11646/zootaxa.2198.1.6.