20. Cheilolejeunea norisiae Dauphin & Gradstein (2003: 259) .

Type:— PANAMA. Panamá: Cerro Azul, Sendero El Cantar, open secondary growth area next to forested area, 9°12’57”N, 79°24’32”W, 800–900 m, 20 March 1996, G. Dauphin 96-23 (holotype PMA!).— Fig. 12 AA –EE.

Plants yellowish green, in herbarium material light brown, ca. 0.8 mm wide. Stems in cross section 50 µm in diameter, 7 epidermal cells and 9 medullary cells. Ventral merophytes 2 cells wide. Leaves subimbricate, ovate, flat, 170–190 × 230–300 µm; margin ciliate-crenate, apex acute-laciniate, dorsal and ventral margins curve; cells hexagonal, papillose on the dorsal side, conspicuous trigones; basal cells 16–28 × 10–11 µm, median cells 18–20 × 12–17 µm, marginal cells 10–17 × 1–16 µm. Lobules rectangular, inflated, 1/3–1/2 of leaf length, free margin involute, apical tooth short, formed by 2–3 rectangular cells, 18 × 10 µm, keel arched and strongly papillose. Underleaves distant, orbicular to ovate, 125–135 × 105–110 µm, 1.5–2 × stem width, bifid to 1/4–1/3, V-shaped sinus, margin entire, base cuneate. Reproductive structures not seen.

Distribution and habitat:— Panama and Cuba (Mustelier-Martinez 2012). This species grows as an epiphyte on tree trunks in the study area, near streams, between 700–1000 m, in lower montane rainforests, in the GuatusoTalamanca and Puntarenas-Chiriquí provinces of the Pacific dominion (Dauphin & Gradstein 2003, Schäfer-Verwimp 2014) (Fig. 13).

Comments: —Ciliate-crenate margins are characteristic of this species, making it easily identifiable, together with characteristics such as the ventral merophyte only 2 cells wide, and lobule keel strongly papillose.