Pleosporales » Pseudoastrosphaeriellaceae » Pseudoastrosphaeriella

Pseudoastrosphaeriella papillata

Pseudoastrosphaeriella papillata (K.D. Hyde & J. Fröhl.) Phook. & K.D. Hyde

Basionym: Astrosphaeriella papillata K.D. Hyde & J. Fröhl., Sydowia 50(1): 109 (1998)

Index Fungorum number: IF551646; Facesoffungi number: FoF 01238

Holotype: IFRD 8704

Etymology: from the Latin papillata, in reference to the long necks.

 

Saprobic on submerged bamboo, visible as numerous, raised, black, dome-shaped, with spike-like structures in dark area on host surface. Sexual morph: Ascostromata 300–430 μm high (excluding neck), 550–820 μm diam., black, scattered, solitary to gregarious, immersed in host cortex, becoming raised, erumpent through host tissue by papilla, hemisphaerical or depressed conical, flattened at the base, uni-loculate, glabrous, coriaceous, ostiolate. Neck 490–800μm high, 120–150 μm diam., central, cylindrical, oblique to curved, single, rarely furcate at the apex, brittle, carbonaceous. Peridium 10–130 μm wide, of unequal thickness, thick at the sides towards the apex, composed of small, hyaline to dark brown or black, pseudoparenchymatous cells, outer layers comprising host cells plus fungal tissue, arranged vertically in a textura angularis to textura prismatica, poorly developed at the base, with palisade-like cells at the rim. Hamathecium composed of dense, 0.7–1.5 μm wide, filiform, trabeculate pseudoparaphyses, anastomosing at the apex, embedded in a hyaline gelatinous matrix. Asci (130–)135–165(–172) × (15–)17–20(–22) μm (x̄ = 152.6 × 18.2 μm, n = 25), 8-spored, bitunicate, fissitunicate, cylindric-clavate, with slightly furcate, rounded pedicel, apically rounded, with indistinct ocular chamber. Ascospores (29.5–)30–40(–45) × 6–8(–9.5) μm (x̄ = 38.4 × 8 μm, n = 30) overlapping uni- to bi-seriate, yellowish brown to grey brown, broadly fusiform to clavate, with drawn out, narrow, often curved, rounded ends, initially 1-septate, rarely 2–3-septate, constricted at the central septum, slightly swollen above the central septum, walls rough, with small, pad-like, mucilaginous appendages at both ends. Asexual morph: Undetermined. (Description from Phookamsak et al. 2015)

 

Material examined: BRUNEI, Temburong, Batu Apio Forest Reserve, Sungai Belalong, Kualak. Field Studies Centre, Sungai Esu, on dead submerged bamboo, 1 February 1994, K.D. Hyde, (IFRD 8704, holotype).

 

Notes: Pseudoastrosphaeriella papillata was described by Hyde and Fröhlich (1998) from dead, submerged bamboo from a small stream in Brunei. Pseudoastrosphaeriella papillata may be a common species on submerged bamboo and wood in tropical regions (Luo et al. 2004; Pinruan et al. 2007) with 19.5 % percentage occurrence on submerged bamboo in the Liput River in Philippines (Cai et al. 2003). The collections, however, need verifying against the reference specimen of P. papillata. In this study, the type specimen of Astrosphaeriella papillata is examined and found that A. papillata has morphological characters related to Pseudoastrosphaeriella. Thus, we transfer Astrosphaeriella papillata to Pseudoastrosphaeriella. Pseudoastrosphaeriella papillata is similar to P. longicolla and the differences are discussed under that species. (Notes from Phookamsak et al. 2015)

 

Freshwater distribution: Brunei (Hyde and Frohlich 1998), Philippines (Cai et al. 2003), Yunnan, China (Luo et al. 2004)

 

Fig. 1 Pseudoastrosphaeriella papillata (IFRD 8704, holotype of Astrosphaeriella papillata). a Herbarium label and specimens. b Appearance of ascostromata on host surface. c Section of ascostroma. d Section of peridium. e Pseudoparaphyses. f–i Asci. j–m Ascospores. Scale bars: c = 200 μm, d–e = 50 μm, f–h = 20 μm, j–m = 10 μm. (Phookamsak et al. 2015)

 

References

Cai L, Zhang KQ, McKenzie EHC, Hyde KD (2003) Freshwater fungi from bamboo and wood submerged in the Liput River in the Philippines. Fungal Divers 13:1–12

Hyde KD, Frohlich J (1998) Fungi from palms XXXVII. the genus Astrosphaeriella, including ten new species. Sydowia 50:81–132

Luo J, Yin J, Cai L, Zhang KQ, Hyde KD (2004) Freshwater fungi in Lake Dianchi, a heavily polluted lake in Yunnan, China. Fungal Divers 16:93–112

Phookamsak R, Norphanphoun C, Tanaka K, Dai DQ, Luo ZL, Liu JK, Su HY, Bhat DJ, Bahkali AH, Mortimer PE (2015) Towards a natural classification of Astrosphaeriella-like species; introducing Astrosphaeriellaceae and Pseudoastrosphaeriellaceae fam. nov. and Astrosphaeriellopsis, gen. nov. Fungal Divers 74:143–197

Pinruan U, Hyde KD, Lumyong S, McKenzie EHC, Jones EBG (2007) Occurrence of fungi on tissues of the peat swamp palm Licuala longicalycata. Fungal Divers 25:157–173

 

Recent Genus

1
Neochlamydotubeufia
Neohelicomyces

Recent Species

Neohelicomyces submersus
Neohelicomyces hyalosporus
Neohelicomyces grandisporus