Cirsosia manaosensis (Henn.) G. Arnaud
≡ Lembosia manaosensis Henn. [as ‘manaoensis’], Hedwigia 43: 265 (1904)
Type: K(M) 176510.
Epiphytes on the leaf lower surface. Superficial hyphae spreading over the host surface. Appressoria intercalary, composed of 3 cells, with the central cell swelling. Sexual state: Thyriothecia 260–285×150–163μm diam (x = 265×158μm, n=5) solitary and gregarious, superficial, easily removed from the host surface, black, opening by a linear fissure, with basal peridium poorly developed. Upper wall comprising linear, dark cells, which are branched at the margin. Hamathecium lacking pseudoparaphyses. Asci 50–55×46–50μm (x = 53× 48μm, n=10), bitunicate, fissitunicate dehiscence not observed, globose to subglobose, apedicellate, apical region of asci usually with a thick opaque region, ocular chamber not observed, not staining blue in IKI. Ascospores 29–34×14–17μm (x = 31×15μm, n=10), overlapping, oblong to obovoid, hyaline when immature, brown when mature, 1-septate, echinate, constricted at the septum. Asexual state: Unknown
Material examined: BRAZIL, Amazonas, on leaves of Elondia verrucosa, collected by E. Ule (K(M) 176510, isotype).
Notes: Cirsosia contains 15 species which are similar to Lembosia species. These need re-examining to confirm the distinctiveness and placement.
Fig. 1 Cirsosia manaosensis (isotype). a, b Herbarium packet and s Specimen. c–e Appearance of thyriothecia on the host surface. f, g hyphae with appressoria. h Squash mount of thyriothecium showing longitudinal fissure. i Upper wall of thyriothecium. j Hamathecium. k, l Asci when immature. m, n Ascospores when immature. o Ascospores at maturity. p Wall of ascospore. Scale bars: b=3 cm, f, g=20μm, h, i= 50μm, j=10μm, k–o = 2 0μm, p=5μm
