Hypocreales » Ophiocordycipitaceae » Paraisaria

Paraisaria alba

Paraisaria alba D.P. Wei & K.D. Hyde, in Wei et al., Frontiers in Microbiology 11(no. 608991): 6 (2021)

MycoBank number: MB 833999, Facesoffungi number: FoF 07239

Parasitic on an adult cricket (Orthoptera). Sexual morph: Stroma up to 26 mm in tall, single, unbranched, growing from the flank of the host. Fertile head 3.5 mm in diam., globose, white when fresh, yellow brown when dry. Stipe 22.5 × 1.2 mm, slightly flexuous, fleshy, white, glossy, not hollow. Perithecia 200–500 × 100–220 (x̄ = 325 × 145, n = 20) μm, immersed, ovoid. Asci 160–250 × 2.5–5 (x̄ = 200 × 3.5, n = 10) μm, unitunicate, hyaline, narrow cylindrical, attenuated toward the base, with thickened cap. Peridium 10–40 (x̄ = 20, n = 30) μm in thick, comprising hyaline, thick-walled cell of textura angularis. Apical cap 4.6–7.4 × 3.2–4.9 (x̄ = 6 × 3.8, n = 30) μm, with a narrow tunnel throughout the center. Ascospores filiform, equal to the asci in length, when mature, breaking into numerous secondary ascospores. Secondary ascospores 3–5 × 0.5–1.5 (x̄ = 4 × 1, n = 30) μm, cylindrical, hyaline, smooth, one-celled, straight, with truncated ends. Asexual morph: Underdetermined (Wei et al. 2021)

Known hosts and distributions: On an adult cricket (Thailand: Krabi) (Wei et al. 2021).

Sequence data: HKAS 102484 (SSU = MN943843, LSU = MN943839, ITS = MN947219, TEF = MN929085, RPB1 = MN929078, RPB2 = MN929082). Phylogenetic tree (see entry Paraisaria rosea).

 

Paraisaria alba (Material examined: Thailand, Krabi, Plai Phraya, on an adult cricket, 20 December 2018, Deping Wei, 211-1(HKAS 102484– holotype)). (a) Habitat. (b) Host imbedded into the soil with the stroma emerging from the ground. (c) Stroma arising from host. (d) Fertile head. (e) Longitudinal section through fertile head. (f,g) Perithecia. (h) Peridium. (i–k) Asci. (l) Ascus cap. (m) Part of the asci. (n–p) Secondary ascospores. Scale bars: (f) 500 mm, (g) 200 mm, (h) 20 mm, (i–k) 50 mm, (m) 30 mm, (l,n–p) 5 mm. (k–m mounted in cotton blue reagent)

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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