Hypocreales » Ophiocordycipitaceae » Paraisaria

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)

 

Paraisaria arcta (Material examined: China, Guizhou Province, Qianxinan Buyei and Miao Autonomous Prefecture,Ceheng County, Gaofeng Villige (on dead larva of Lepidoptera sp., 6 August 2018, Deping Wei, GFC604 (HKAS 102553–holotype)). (a) Substrate. (b–d) Stromata emerging from host mouth. (e) Fertile head. (f–h) Perithecia. (i) Ostiole. (j) Peridium. (k,l) Asci. (m) Parts of ascus. (n) Ascus cap. (o,p) Secondary ascospores. Scale bars: (d,e) 2000 mm, (f) 500 mm, (g,h) 200 mm, (i,k) 50 mm, (j,m) 15 mm, (l) 30 mm, (n–p) 3 mm (Wei et al. 2021)

References:

Wei DP, Wanasinghe DN, Xu JC, To-anun C, Mortimer PE, Hyde KD et al. 2021 – Three novel entomopathogenic fungi from China and Thailand. Frontier in Microbiologgy 11: 608991.

 

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