Paraisaria arcta

Paraisaria arcta D.P. Wei & K.D. Hyde, in Wei et al, Frontiers in Microbiology 11(no. 608991): 10 (2021)

MycoBank number: MB 834000, Facesoffungi number: FoF 07240

Parasitic on larva of Lepidopteran larva. Sexual morph: Stroma 16 mm long, single, arising from the mouth of host larva. Fertile head 2 mm long, 3 mm wide, white, nearly globose, constricted at the center, with sticky and crystal-like substance on the surface. Stipe 14 mm long, 2 mm wide, straight, fleshy, white, glossy. Perithecia 230–530 × 70–180 (x̄ = 387 × 113, n = 20) μm, completely immersed, ampulliform to ellipsoid. Peridium 14–20 (x̄ = 17, n = 30) μm wide, composed of hyaline, thick-walled, smooth-walled cells of textura angularis. Asci 100–180 × 2–4 μm (x̄ = 137 × 2.9, n = 15), unitunicate, hyaline, narrow cylindrical, tapering toward the base, 8-spored, with thickened cap. Apical cap 3.5–4.5 × 2–3.6 μm thick (x̄ = 4 × 2.8, n = 20), with a narrow tunnel throughout the center. Ascospores hyaline, narrow filiform, equal to the asci in length, when mature, breaking into numerous secondary ascospores. Secondary ascospores 2.6–4.2 × 0.5–1.3 μm (x̄ = 3.3 × 0.9, n = 60), cylindrical, with truncated ends, hyaline, smooth, one-celled, straight. Asexual morph: Undetermined. (Wei et al. 2021)

Known hosts and distribution: on dead larva of Lepidoptera sp. (China: Guizhou Province) (Wei et al. 2021)

Sequence data: HKAS 102553 (SSU = MN943845, LSU = MN943841, ITS = MN947221, TEF = MN929087, RPB1 = MN929080) (Wei et al. 2021). Phylogenetic tree (see entry: Paraisaria rosea)