J.C.Villarreal & Cargill (M.Howe) No year - Villarreal JC, Cargill C, Söderström L, Hagborg A, von Konrat M. Notes on Early Land Plants Today. 70. Nomenclatural notes in hornworts (Anthocerotophyta). Phytotaxa 208: 92-96. (2015).
There is no corrections for Paraphymatoceros pearsonii yet.