Hyphodontia brevidens

Select illustrations:

Synonyms:

= Irpex brevidens Pat. in Pat. & Lagerheim 1895, Bull. Herb. Boiss. 3: 55.

Holotype: Ecuador, Pululahua, on dead wood, leg. Lagerheim, Herbarium FH.

= Hyphodontia africana Ryv. 1978, Bull. Jard. Bot. Nat. Belgique 48(1/2): 88.

Holotype: Rwanda, Distr. Lacs Edouard and Kivu, forest near Rugege, road from Butare to Cyangugu, Kilometer 100, leg. Rammeloo, 23.07.1976, Rammeloo 3929, Herbarium GENT.

Isotypi: Herbaria BR, O, DAOM.

Macromorphology:

Micromorphology:

Spores:

4-4.5 x 3.5-4.5 µm, subglobose to globose, thin-walled, smooth, inamyloid, without droplets.

Basidia:

12-18 x 3-6 µm, young barrel-shaped, cylindical or clavate, mature suburniform with one constriction and one basal clamp each.

Sterigmata:

Four, up to 3 µm long.

Cystidia:

Tubular tramacystidia, several 100 µm long, 2.5-4 µm in diameter, thick-walled (< 1.5 µm), walls yellow pigmented. They are covered in a very characteristical manner by crystals which surround the cystdium. These characteristcal cystals are not soluble in 5% KOH solution. The tramacystidia arrise only from the subiculum.

Clamps:

All primary septa with one clamp each.

Hyphae:

Hyphal system because of the very long tramacystidia appering likepseudodimitic. Basal hyphae 2.5-3 µm in diameter, thin-walled, very closely attached to the substrate. Subicular hyphae 3-4 µm in diameter, thick-walled ( up to 1 µm), long-celled, very loosely interwoven. Subhymenial hyphae 3-4 µm in diameter, thin-walled, short-celled, dense hyphal ramification. Hyphal branching by outgrowing of clamps and subseptal outgrowing.

Aculei:

Aculei consist of parallel arranged, tubular tramacystidia. They make the hyphal system look like if it was dimitic. The aculei are fertile up to the top.

Substrate and habitate:

Biogeography:

Remarks:

Spores ellipsoid, cylindric, slightly allantoid
  Spores ellipsoid..................................H. gossypina
  Spores cylindric up to slightly wide allantoid....H. tomentosa
Spores globose up to subglobose.....................H. brevidens

Herbarium specimens:

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