Trichopeltina labecula (Mont.) Theiss., Zentbl. Bakt. ParasitKde, Abt. II 39: 630 (1914).

Asteroma labecula Mont., Annls Sci. Nat., Bot., sér. 2 14: 328 (1840).

MycoBank number: MB 220570; Index Fungorum number: IF 220570; Facesoffungi number: FoF 07912, Fig. 134

Epiphytic on leaves, appearing as “root-like” darkened areas. Thallus very thin, superficial, comprising neatly or irregularly arranged, angular or cylindrical to cuboid cells, with brown to dark brown walls. Sexual morph: Thyriothecia 65–78 μm diam. × 33–48 μm high ( x̄ = 74 × 39 μm, n = 10), developing under thallus tissue, globose to subglobose, flattened, with a porate, central ostiole. Hamathecium com- prising branched, aseptate pseudoparaphyses. Asci 20–29 × 14–17 μm ( x̄ = 26 × 15 μm, n = 10), 8-spored, bitunicate, fissitunicate, clavate, short pedicellate or apedicellate, long pedicellate when immature, apically rounded, usually with a small ocular chamber. Ascospores 15–17 × 3–4 μm ( x = 16 × 3 μm, n = 10), 2–3-seriate, long clavate, hyaline, sometimes pale brown in the lower cells, 1–2-septate, slightly constricted at each septum, upper cells wider and shorter than lower cells, smooth-walled. Asexual morph: Undetermied.

Material examined: France, Guiana, Gabaret River, on coriaceous leaf of Desfontainia, September 1835, Collec no. 664 (PC 0084645, syntype of Asterina labecula).

Fig. 134 Asterina labecula (PC 0084645, syntype). a Specimens. b Ascomata on host substrate. c Ascomata with thin and superficial thallus in 70% lactic acid. d Walled cells of ascoma and ostiole. e Walled cells of thallus composed darkly pigmented cells. f Hamathecium in Melzer’s reagent. g Asci when immature in Melzer’s reagent. h Asci in Melzer’s reagent. i Asci in cotton blue reagent. j Ascospore 2-septate in 70% lactic acid. k Ascospore uniseptate in Melzer’s reagent. l Ascospore 2-septate in cotton blue reagent. Scale bars: c = 100 μm, e–i = 20 μm. j–l = 10 μm