Diaporthomycetidae families incertae sedis » Trichosphaeriaceae » Unisetosphaeria

Unisetosphaeria penguinoides

Unisetosphaeria penguinoides Pinnoi et al.

 

Sexual morph: Ascomata 75–100 µm diameter, 125–200 µm high, immersed, semi-immersed or superficial, pyriform, hyaline to light brown, dark brown near the apex, coriaceous, ostiolate, papillate, scattered. Papilla periphysate surrounded by short dark hairs. A single seta, 100–150 µm long, 10–12.5 µm diameter, made up of several rows of brown cells arises from the ostiolar region. Peridium up to 10 µm wide, composed of 2–4 layers of angular, brown-walled cells. Paraphyses sparse, obscure, comprising short rows of ovoid to oblong cells, ~12 ´ 7 µm. Asci 75–102 ´ 20–25 µm (x̄ = 87 × 21.8 µm), 8-spored, clavate, unitunicate, short pedicellate, apically truncate, with a refractive, J-apical ring, 4.5–5 µm long, 4–5 µm diameter. Ascospores 18.5–22.5 ´ 10–14 µm (x̄ = 21.5 ´ 11.8 µm, n = 25 µm), 2-seriate, ovoid to fusoid, straight or curved, hyaline, 3-septate, smooth-walled, with a large guttule in each cell, surrounded by a thin layer of mucilage. Asexual morph: Undetermined

Holotype: THAILAND, Narathiwat, Sirindhorn Peat Swamp Forest, on submerged petiole of Eleiodoxa conferta, June 22, 2001, A. Pinnoi (Aom103 in BBH). 

Isotype: (PDD 76344).

Etymology: from penguin and –oides, in reference to the similarity of the ascomata in section to a penguin outline.

Distribution: THAILAND, Narathiwat Province, on submerged petiole of Eleiodoxa conferta (Pinnoi et al. 2003).

Notes: Holotype BBH Aom 103. Sequence data is not available.

 

References

Luo ZL, Hyde KD, Liu JK, Maharachchikumbura SSN et al. 2019 – Freshwater Sordariomycetes. Fungal Diversity 99, 451–660.

Pinnoi A, Jones EBG, McKenzie EHC, Hyde KD (2003) Aquatic fungi from peat swamp palms: Unisetosphaeria penguinoides gen. et sp. nov., and three new Dactylaria species. Mycoscience 44:377–382

 

Figs. 1–11. Light micrographs and diagram of Unisetosphaeria penguinoides (from holotype). 1, 2 Ascomata on substratum. 3 Section of ascoma. Note the blackened neck and single long brown seta. 4 Diagrammatic representation of ascoma section. 5–7 Asci. Note the relatively large subapical ring (arrow head in 6). 8 Paraphyses comprising short rows of ovoid to oblong cells. 9–11 Ascospores with thin mucilaginous sheath. Scale bars 1, 2 = 150 µm; 3, 4 = 50 µm; 5–11 = 20 µm (Pinnoi et al. 2003)

 

 

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