Akiyama, H. and Tan, B.C. 2013. The new synonymy of Horikawaea with Cryptogonium and a proposal of Pseudocryptogonium, gen. nov. (Musci, Pterobryaceae). Phytotaxa. 98, 1 (May 2013), 16–22. DOI:https://doi.org/10.11646/phytotaxa.98.1.2.