Hyphodontia tetraspora

(Rattan) Hjortst. 1987, Windahlia 17: 58.

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Synonyms:

= H. efibulata f. tetraspora Rattan 1977, Bibl. Mycol. 60: 335.
Holotype: India, Himalach Pradesh, Jaggat Sukh, Kulu, leg. S.S. Rattan, 14.09.1971, No. 4354, Herbarium K.
Isotype: PAN, BPI, TENN, DAOM.

Macromorphology:

Resupinate, slightly verruculose, margin thinning out, cream-coloured, up to ca. 600 µm thick.

Micromorphology:

Spores:
3-5 x 2-2.5 µm, ellipsoid, thin-walled, smooth, inamyloid, without droplets (herbarium specimens).
Basidia:
12-15 x 3.5-4.5 µm, clavate up to suburniform with one constriction each, without basal clamps, basidia mature simultaneous.
Sterigmata:
Four.
Cystidia:
Tubular tramacystidia, 4.5-7 µm in diameter, up to ca. 125 µm long, basal thick-walled (up to 1 µm), apical thin-walled and slightly incrusted with crystalin exsudat. They arise from the subiculum.
Clamps:
All septa without clamps.
Hyphae:
Hyphal system monomitic. Basal and subicular hyphae 3-5 µm in diameter, slightly thick-walled (up to 0.5 µm). Hyphal branching in the subiculum by subseptal outgrowing of the hyphae in an angle of ca. 45°, loosely branched. Hyphae of the subhymenium 3-4 µm in diameter, thin-walled, densely hyphal ramification.

Habitate and substrate:

Picea.

Biogeography:

India. The type is the only known specimen.

Remarks:

In the genus Hyphodontia only H. tetraspora and H. subglobosa have no clamps in combination with four spored basidia. Both species could be distinguished by the morphhology of their spores:
Basidia four spored
  Spores ellipsoid........H. tetraspora
  Spores subglobose.......H. subglobosa
Basidia two spored........H. efibulata

Herbarium specimens:

India, Himalach Pradesh, Jaggat Sukh, Kulu, on Picea smithiana, leg. S.S. Rattan, 14.09.1971, No. 4354, Herbarium DAOM


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