3 literature references for Papillidiopsis bruchii W. R. Buck & B. C. Tan, 1989 [1990]:

Author: Crosby, M. R. and others - INSUFFICIENT
Year: 1999
Title: INSUFFICIENTLY known because not REVISED since its pre-1963 publication; that is to say we have no more information about the species than Index Muscorum; merely relisted without additional specimens in a checklist since 1963; may have been treated in
Source: Checklist Mosses
Author: W. R. Buck & B. C. Tan
Year: 1989
Title:
Source: Acta Bryol. Asiat.
Author: Buck, W. R. & B. C. Tan
Year: 1989
Title: The Asiatic genera of Sematophyllaceae associated with ~Trichosteleum~
Source: Acta Bryol. Asiat.