Pleosporales » Dictyosporiaceae » Vikalpa

Vikalpa dujuanhuensis

Vikalpa dujuanhuensis

H.W. Shen & Z.L. Luo, Mycology 83: 1–58 (2024)

 

Classification: Ascomycota-Pezizomycotina-Dothideomycetes-Pleosporales- Dictyosporiaceae-Vikalpa

 

Host species: Elaeis guineensis (Xiong et al. 2025)

 

Known distribution: China (Liu et al. 2024, Xiong et al. 2025)

 

IF Number: IF571593      Mycobank Number: 571593     FOF Number: FoF15707

 

Description

Saprobic on dead petiole of Elaeis guineensis. Asexual morph: Hyphomycetous. Colonies on natural substrate, punctiform, sporodochial, scattered, light brown. Mycelium composed of immersed or partly superficial, branched, septate, hyaline to pale brown hyphae. Conidiophores mononematous, micronematous, cylindrical, unbranched, septate, hyaline to pale brown, smooth-walled, sometimes reduced to conidiogenous cells. Conidiogenous cells holoblastic, cylindrical, subglobose, sometimes flat at the base, septate, hyaline to pale-brown, smooth-walled. Conidia (32–)33–40(−43) × (11–)12–13(−14) μm (x̅ = 36 × 13.5 μm, n = 50), solitary, cheiroid, pale brown to brown, consisting of three rows of cells in different planes, 6–8 cells in each row, with the apical cell enlarged, euseptate, irregular, constricted at the septa, guttulate, each row 6–8 μm (x̅ = 7 μm, n = 50) wide, with or without transparent thin gelatinous appendages. Sexual morph: Undetermined

Culture conditions: Conidia germinating on PDA within 12 h and germ tubes produced at ends. Colony growth on PDA; reaching about 2.5–3 cm in 30 days at 25 ℃. Mycelium papillary in the middle part, dense, creamy yellow, brown to reddish-brown, sparse, white at edge; pale cream yellow on the edge and dark reddish brown in the middle on the reverse side.

 

 

 

Vikalpa dujuanhuensis (MHZU 23-0127, new host record). a, b Appearance of sporadithia on host substrate. c–g Conidia. h Germinated conidium. i Culture on PDA from above and reverse. Scale bars c–g = 10 μm, h = 50 μm.

 

Reference

Liu SL, Zhao P, Cai L, Shen S, et al. 2024 – Catalogue of fungi in China 1. New taxa of plant-inhabiting fungi. Mycology 83, 1–58. doi: 10.1080/21501203.2024.2316066.

Xiong YR, Manawasinghe IS, Ausana Mapook 2025 – Addition to Tropical palm fungi: Ten new Records from China and Thailand. Asian Journal of Mycology

 

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