Pycnacronema rubrum Martins et Branco in Martins et al. (2019: 155) (Fig. 10E–F).

Trichomes solitary, unbranched, slightly constricted, not attenuated. Sheath absent. Cell isodiametric to sub-quadratic, 5.5–7.01 µm wide, 3.89–7.77 µm long, ratio l/w = 0.90. Apical cell rounded to conical-rounded, without calyptra or thickening. Cell content granulated, grayish-purple. With necridia.

Habitat:— Tree bark inside the forest; associated with Chroococcidiopsis sp.1 and Gloeocapsopsis sp.

Studied material:— PEUFR55801