Pleosporales » Tetraplosphaeriaceae » Tetraploa

Tetraploa aristata

Tetraploa aristata Berk. & Broome

Index Fungorum number: IF148113


Description from Rifai et al. (1988) observed from decaying grass culm:

Sexual morph: Undetermined. Asexual morph: Colonies effused, greyish brown. Mycelium superficial, consisted of pale brown, smooth walled, flexuous, septate, much branched and anastomosing hyphae 1.8–3.5 yum diam. which form a compact network. Conidiophores micronematous, hardly distinguishable from the mycelium, with integrated, short cylindrical, intercalary, determinate and monoblastic conidiogenous cells. Conidia solitary, obovoid to oblong obovoid in outline, 25–40 × 14–28μm, brown, wall distinctly verrucose, consist of 4 columns or rows of 9–16 μm diam. cells and mostly with 4 cells to each row which tends to diverge from one another apically and terminated by an almost straight, septate, setiform appendage which measures 10–90 μm long, up to 8μm diam. at the base and taper into its 2–3.5 μm paler apex; these four appendages therefore divaricate and generally more or less of equal length.


Freshwater distribution: Argentina and Brazil (Schoenlein-Crusius and Grandi 2003), China (Tsui et al. 2001), Hungary (Révay 1993), India (Karamchand and Sridhar 2008), Peru (Schoenlein-Crusius and Grandi 2003)


Fig 1. Tetraploa aristata conidia. (Rifai et al. 1988)


Fig 2. Tetraploa aristata. A-O development of a spores, P young b spore, Q mature a spore, R a spore stained to show protoplasmic linkage by pores, S mycelium, T lateral view of b spore, U end view of b spore. (All x 500.) (Ellis 1949)

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Fig. 3. Conidia of Tetraploa aristata: a-c on dead leaves of Phleum phleoides (63× magnification), d from modern surface sample (400× magnification). Photo: M. Karpiñska-Kolaczek. (



Ellis MB (1949) Tetraploa. Trans Br Mycol Soc 32:246–251.

Karamchand KS, Sridhar KR (2008) Water-borne conidial fungi inhabiting tree holes of the west coast and Western Ghats of India. Czech Mycol 60:63–74

Karpińska-Kołaczek M, Kołaczek P, Heise W, Worobiec G (2011) Tetraploa aristata Berkeley & Broome (Fungi, Pleosporales), a new taxon to Poland. Acta Soc Bot Pol 79:239–244.

Révay A (1993) Some new or interesting hyphomycetes from Hungary. Nova Hedwigia 56:473–482

Rifai MA, Zainuddin H, Cholil A (1988) The Japanese species of Tetraploa. Reinwardtia 10:419–423

Schoenlein-Crusius IH, Grandi RAP (2003) The diversity of aquatic Hyphomycetes in South America. Brazilian J Microbiol 34:183–193.

Tsui CKM, Hyde KD, Hodgkiss IJ (2001) Longitudinal and temporal distribution of freshwater ascomycetes and dematiaceous hyphomycetes on submerged wood in the Lam Tsuen River, Hong Kong. J N Am Benthol Soc 20:533–549


About Freshwater Fungi

The webpage Freshwater Fungi provides an up-to-date classification and account of all genera of freshwater fungi.


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