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Figure 4; Thallus habitus: A Rostania coccophylla (isotype of Collema coccophyllum Nyl., India, 1858, Perrotet s.n., H-NYL 42355, H–9201376) B Rostania paramensis (Palice 2796, PRA-00013999; holotype of Collema paramense PM Jørg. & Palice) C Scytinium sp. Palice 2274a D Rostania paramensis Palice 2274b. tL = thalline lobes, is = isidia. Scale bar: 1 cm.
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Figure 5; Ascospores: A Rostania quadrifida (McCune 2744, UPS), cubic spores with 2–5 cells B Rostania paramensis (Palice 2796, holotype of Collema paramense), ellipsoid spores with acute ends C Leptogium azureum (Tehler 3140, S), ellipsoid spores with acute ends D Scytinium sp. (Palice 2273), oblong spores, E Scytinium sp. (Palice 2274), oblong spores. Scale bar = 10 µm
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Figure 6; Thalli, transversal cross-sections: A Thallus with pseudocortex and densely interwoven hyphae (Rostania quadrifida, McCune 2744, UPS) B Thallus with pseudocortex and straight and unbranched hyphae which are perpendicular to the surface (Rostania paramensis, Palice 2796, holotype of Collema paramense) C Thallus with eucortex and straight and unbranched hyphae which are perpendicular to the surface (Leptogium azureum, Tehler 3140, S) D Thallus with eucortex and paraplectenchymateous throughout (Scytinium sp. Palice 2273) E Thallus paraplectenchymateous throughout (Rostania occultata var. populina, Llop 56060303, S) A–E in lactic blue C in water. euC = eucortex, PsC = pseudocortex, Hp = hyphae, pPlect = paraplechtenchyma. Scale bar = 10 µm
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Figure 3; Ascospores: A Rostania occultata var. populina (Llop 56060303, S), cubic spores B Rostania ceranisca (Westberg L271_PL433, UPS), oblong spores; ascus (red line) with only four mature spores visible but remnants of four aborted spores can be seen (arrows) C Rostania callibotrys (Sipman 2049, GZU), oblong spores. Scale bar: 10 µm.