Hyphodontia niemelaei

Wu 1990, Acta. Bot. Fenn. 142: 98.

Holotype: Taiwan, Taipei, National Taiwan University, on bark of Cryptomeria japonica, leg. S.H. Wu, 21.10.1988, No. 881021, Herbarium H.
Isotype: Herbarien GB, TAI, S.H.Wu.

Select illustration:

[image] [image]

Macromorphology:

Resupinate, hymenium poroid, cream-coloured, margin white, without pores walls up 150 µm thick, pores walls up to ca. 300 µm high, pores grow positive geotropic.

Micromorphology:

Spores:
4.5-6 x 3-4 µm, ellipsoid, thin-walled, smooth, inamyloid, with one droplet each.
Basidia:
15-23 x 4.5-5 µm, suburniform, mostly with one median constriction and one basal clamp each, often with basidia repetition.
Sterigmata:
Four, up to 3 µm long.
Cystidia:
1. Subulate cystidia, up to ca. 30 µm long and up to 4-6 µm wide. They arise from the hymenium with one basal clamp each.
2. Capitate cystidia, up to ca. 35 µm long, basal up to 5-6 µm wide. They arise from the subiculum with one basal clamp each.
Clamps:
All primary septa with one clamp each.
Hyphae:
Hyphal system monomitic. Basal and subicular hyphae 2-3 µm in diameter, slightly thick-walled (up to 0.5 µm), some hyphae are incrusted with up to 2 µm big, table-like crystalls, loosely hyphal ramification. Subhymenial hyphae 2-3 µm in diameter, thin-walled. In the hymenium often collapsed basidia are present. Hyphal branching by subseptal outgrowing or outgrowing of clamps.
Pores:
Hyphae of the pores walls more or less parallel running. Endhyphae of the pores walls obtuse, thin-walled and partly incrusted with up 2 µm big, table-like crystalls.

Habitate and substrate:

Rain forests and montane mountain forests of subtropical to tropical area. Substrate: Cryptomeria japonica and Itea oldhamii (Wu 1990).

Biogeography:

Taiwan, Cameroon and Columbia. These three records point to pantropical distribution.

Remarks:

H. niemelaei and H. apacheriensis are very similar. There are very little differences in their spores morphology. Hjortstam (personal comm.) prefers a wider species concept with H. niemelaei and H .apacheriensis in one species showing only different develpomental stage of the basidiocarp. Wu (1990) however collected several, morphologically identical specimens in Taiwan. As long as there are no intermediate specimens known, both species should not be treated as synonyms. H. nothofagi is very similar to H. niemelaei and H. apacheriensis, but is clearly distinguished in its spore morphology: 
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:

Taiwan, Taipei, National Taiwan University Campus, on bark of Cryptomeria japonica, leg. S.H. Wu, 21.10.1988, No. 881021, Herbarium H.
Columbia, Dept. Magdalena, Sierra nevada de Santa Marta, Reserva Forestal San Lorenzo, 1900-2300 m alt., on bark, leg. L. Ryvarden, 17.-19.06.1978, LR 15988, Herbarium O.
Cameroon, Campo prov., Akok "lowland rain forest reserve", on bark of, leg. M. Nuñez, L. Ryvarden, 2.-15.12.1991, LR 30659, Herbarium O.

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Dr. Ewald Langer - 28. Febr. 1996
ewald.langer@uni-tuebingen.de