Hyphodontia nothofagi

(G.H. Cunn.) E. Langer, 1994, Bibl. Mycol. 154: 162.

Select illustrations:

[image]

[image] A [image] B [image] Ontogenies

Synonyms:

= Poria nothofagi G.H. Cunn. 1965, New Zealand Dept. Sci. Industr. Res. Bull. 164: 261.
= Schizopora nothofagi (G.H. Cunn.) Buchanan & Ryv. 1988, Mycotaxon 31(1): 20.
Holotype: New Zealand, Wellington, Waihohonu River, Mt. Tongariro, on Nothofagus cliffortioides, 1200 m alt, Herb. Cunningham Nr. 5275, Herbarium PDD.
Paratype: New Zealand, Auckland, Pangarara River, Mt. Tongariro, Dec. 1946, Herb. Cunningham No. 5269, Herbarium PDD.

Macromorphology:

Resupinate, poroid, cream-coloured to yellowish, margin thinning out, pores not regularly formed, subiculum without pores walls up to 300 µm thick, pores walls up to 5 mm long and 500 µm thick, 1-4 pores per mm.

Micromorphology:

Spores:
6.5-8 x 2.5-3 µm, cylindric to suballantoid, thin-walled, smooth, inamyloid. In herbarium specimens no spore droplets visible in KOH mounted slides.
Basidia:
20-24 x 4-5 µm, young shortly clavate, mature suburniform with one basal clamp each, often basidial repetition.
Sterigmata:
Four, up to 4 µm long.
Cystidia:
Capitate cystidia, up to ca. 30 µm long, basal up to 5 µm in diameter, apex partually also subulate or obtus.
Clamps:
All primary septa with one clamp each.
Hyphae:
Hyphal system monomitic. Basal and subicular hyphae 2-3 µm in diameter, slightly thick-walled (< 0.5 µm), partually strongly incrusted with 1-3 µm large crystalls (not soluble in 5% KOH solution). Subhymenial hyphae 2-3 µm in diameter, thin-walled . Hyphal branching by subseptal outgrowings or outgrowings of clamps. In the whole fruit body densely hyphal ramification present. There are no differences between subicular and subhymenial hyphae. The walls of the hyphae appear very faint. Also there are many collapsed hyphae in the subhymenium. Therefor it is difficult to analyze the hyphal context.
Pores:
Pores walls consist of thin-walled, densely running, parallel hyphae.

Habitate and substrate:

Wet forests with Nothofagus up to 1200 m alt. (Cunningham 1965).

Biogeography:

Hitherto only specimens from New Zealand are known.

Remarks:

Poria nothofagi G.H. Cunn. has characteristical features of the genus Hyphodontia (suburniform basidia, hyphodontioid hyphal branching, capitate cystidia). However P. nothofagi has no strongly thickened hyphal walls and no lageniform cystidia like the representatives of the genera Echinoporia and Schizopora. P. nothofagi was therefor transferred into Hyphodontia nothofagi by Langer (1994). The species H. apacheriensis, H. niemelaei and H. nothofagi all have poroid hymenium as well as monomitic hyphal systems and could be distinguished by their different spore morphologies. Cunningham illustrates H. nothofagi from New Zealand (Cunningham 1963: 66). It is remarkable that this species only was found in the Nothofagus forests of South America. 
Spores shorter than 6 µm, ellipsoid up to subglobos
  Spores wider than 4 µm,  subglobos..........H. apacheriensis
  Spores more narrow than 4 µm, ellipsoid.....H. niemelaei
Spores longer than 6 µm, cylindric..........H. nothofagi

Herbarium specimens:

New Zealand, Auckland, Pangarara River, Mt. Tongariro, Dec. 1946. Herb. Cunningham No. 5269, Herbarium PDD.

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Dr. Ewald Langer - 27. Febr. 1996
ewald.langer@uni-tuebingen.de