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 cyathaeicola Brugg. -Nann. ( Fig. 5 ) This relatively large species, 6.0 × 0.5 mm , is characterized by ½ limbate vaginant laminae, pluripapillose laminal cells and erect, narrow, undivided or irregularly divided peristomes with papillose filaments. In mats or scattered on bark of tree ferns. Peristome Slightly curved inwards when wet, stiff, undivided or irregularly divided.Teeth with short, up to 5 cells high, undivided part and a papillose distal part150 µm long, tooth base 30-32.5 µm wide, rudimentary second filament ( Fig. 5C ) occasionally present. Ornamentation OPL short, ±5 cells tall, undivided basal part with distinct, smooth trabeculae and ±smooth lamellae; the first cell above the bifurcation with distinct trabeculae and vertical walls and a sparse lamellar ornamentation; more distal cells densely and lowly papillose; IPL papillose throughout the teeth, IPL cells thicker than the thin, transparent OPL cells ( Fig. 5C ); filaments papillose. Sporophyte Seta 1.2-1.5 mm long, smooth; capsule 0.5 × 0.2-0.3 mm with exothecial cell columns 26-32, the cells thin-walled, oblong; operculum ± 0.2 mm long; spores 9.0-13.5 µm diam., papillose. Description and illustration Bruggeman-Nannenga & Arts (2010 : fig. 21).