Fissidens granulidens Brugg.

Bruggeman-Nannenga, Maria Alida, 2022, On the peristomes of the corticolous African species of Fissidens Hedw. (Fissidentaceae, Bryophyta), Cryptogamie, Bryologie 20 (2), pp. 9-36 : 20

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).

Figures

FIG. 8. — Fissidens granulidens Brugg.-Nann. A, seta with capsule (moist); B-D, impressions of the peristome. All from holotype, Madagascar, forêt primitive de Manjkatompo, Heim s.n., PC0773629A. Scale bars: A, 0.5 mm; B, 50 µm; C, D, 20 µm.