On the peristomes of the corticolous African species of Fissidens Hedw. (Fissidentaceae, Bryophyta) Author Bruggeman-Nannenga, Maria Alida Griffensteijnseplein 23 NL- 3703 BE Zeist (The Netherlands) text Cryptogamie, Bryologie 2022 2022-03-24 20 2 9 36 http://dx.doi.org/10.5252/cryptogamie-bryologie2022v43a2 journal article 10.5252/cryptogamie-bryologie2022v43a2 1776-0992 12215089 Fissidens granulidens Brugg. -Nann. ( Fig. 8 ) This tiny corticolous species is best characterized by its granulose, undivided peristome and laminal cells with ±2large papillae with a blunt, rounded apex that with oil-immersion looks rugose. Growing on bark. Peristome Slightly incurved when moistened, undivided, thin with granulose ornamentation; teeth ±50 µm long, tooth base 17-20 µm wide. Only one capsule known. Peristome distinctive, due to the transparency it is impossible to distinguish between OPL and IPL. The joint appearance of OPL and IPL is that of granulose teeth with partly thickened lamellae. Sporophyte Seta 1 mm long, smooth, basal part somewhat rugose; capsule cylindrical 0.3 × 0.2 mm with exothecial cell columns ± 22, the cells oblong, thin-walled; operculum not seen; spores subglobose, 19-21.5 × 17-19 µm, papillose. Description and illustration Bruggeman-Nannenga (in press: 40; fig. 2).