Clavatispora
Clavatispora Boonmee & K.D. Hyde, in Boonmee et al., Phytotaxa 176(1): 95 (2014).
Index Fungorum number: IF 805923; Facesoffungi number: FoF 08829, 1 morphological species (Species Fungorum 2022), 1 species with molecular data.
Saprobic on dead stems of herbaceous plants. Sexual morph: Ascomata superficial, solitary, scattered on substrate, developing on subiculum of brown hyphae, subglobose to globose, dark brown, covered with dark brown, thick-walled, septate setae, and strands of radiating fused hyphae at base, with a barely raised, bright, central ostiole. Peridium comprising 6–8 layers of dark brown cells of textura angularis, almost black at outside. Hamathecium of ca 2 µm wide, anastomosing, septate, branched pseudoparaphyses, hyaline, embedded in gelatinous matrix. Asci bitunicate, subclavate to broadly obovoid, thick-walled, with a short pedicel, apically rounded, lacking an ocular chamber. Ascospores overlapping 2–3-seriate, clavate, asymmetrical, yellowish to reddish brown, becoming dark brown at maturity, muriform, constricted at septa, tapering towards a subacute base, with basal cell pale brown or brownish, smooth-walled. Asexual morph: directly developing on MEA. Mycelium superficial, pale to moderately dark brown, composed of septate, branched, thin- to thick-walled, smooth-walled, 1–3 µm wide hyphae. Conidiophores erect, developing on hyphae, brown or light brown, septate, smooth, sometimes branched. Conidiogenous cells holoblastic, subglobose. Conidia ellipsoidal to subglobose, pale brown to brown, guttulate, rounded at apex, sub-acute at base, trans-septate, constricted and darkened at septa, smooth-walled (adapted from Boonmee et al. 2014).
Type species: Clavatispora thailandica Boonmee & K.D. Hyde
Notes: Clavatispora is characterised by superficial, subglobose to globose ascomata, subclavate to broadly obovoid asci and clavate, asymmetrical, yellowish to reddish brown ascospores. Clavatispora resembles Trichocladium in having muriform brown ascospores but differs in having branched conidiophores, light pigmented conidia and cells with conspicuous guttules (Hyde et al. 2013). Clavatispora differs from similar genera in Sympoventuriaceae in having solitary ascomata, enclosed in superficial, dark setae, a bright ostiole and hyphomycetous asexual morph. Clavatispora is phylogenetically distinct from Trichocladium and forms a distinct lineage in Sympoventuriaceae. Molecular markers available for Clavatispora are ITS, LSU, SSU, and TEF1.
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