Pleosporales » Lophiostomataceae » Lophiostoma

Lophiostoma purpurascens

Lophiostoma purpurascens (K.D. Hyde & Aptroot) Aptroot & K.D. Hyde

Basionym: Massarina purpurascens K.D. Hyde & Aptroot, Nova Hedwigia 66(3–4): 496 (1998)

Index Fungorum number: IF 375324

Holotype: HKU (M) 362B

Etymology: Latin purpurascens, turning 'purple', in reference to the purple staining of the wood in the vicinity of the fungus.

 

Sexual morph: Ascomata deeply immersed, partly staining the wood reddish purple, visible as minute ostiolar dots; in section 91–130 µm high, 195–260 µm diam. and 416–715 µm long, lenticular or cylindrical, mostly with a flattened base, papillate, coriaceous and scattered. Papilla ca. 325 µm high, 91 µm wide, immersed, except for the short apex, blackened where superficial, cylindrical; ostiole without periphyses. Peridium 10–25 µm thick, thinner at the base, hyaline inside, partly black outside, comprising 6 or fewer rows of angular to globose cells. Asci 120–180 × 40–50 µm. Ascospores 44–50 × 13–16 µm, 2-3-seriate, fusiform, hyaline, 2-celled, constricted at the septum, surrounded by a 2.5 µm wide mucilaginous sheath. Asexual morph: Undetermined. (Description from Hyde and Aptroot 1998)

 

Material examined: AUSTRALIA, North Queensland, Atherton Tablelancis, ClohesyRiver on submerged wood, Oct 1990, K.D. Hyde (HKU(M) 362B, holotype). PAPUA NEW GUINEA, Madang Province, foothills of Finisterre range, 40.8 km along road Madang-Lae, 5°26′S, 145°34′E, 200 m alt., on branch submerged in a small stream in primary forest, 2 Nov. 1995. A. Aptroot 36619 (CBS).

 

Freshwater distribution: Australia (Hyde and Aptroot 1998), China (Tsui et al. 2000), New Guinea (Hyde and Aptroot 1998)

 

Fig. 1 Lophiostoma purpurascens 19. Section of ascoma in wood. 20. Peridium. 21,ocular chamber and ring in ascus. 22. Ascus. 23-25. Ascospores with narrow sheath. Bars: 19 = 100 µm, 20-25= 10 µm. (Hyde and Aptroot 1998)

 

References

Hyde KD, Aptroot A (1998) Tropical freshwater species of the genera Massarina and Lophosioma (ascomycetes). Nova Hedwigia 66: 489–502.

Tsui CKM, Hyde KD, Hodgkiss IJ (2000) Biodiversity of fungi on submerged wood in Hong Kong streams. Aquat Microb Ecol 21:289–298. https://doi.org/10.3354/ame021289

 

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