Hyphodontia microspora
John Eriksson & Hjortst. 1976
in Eriksson & Ryvarden, The Corticiaceae of North Europe, Vol. 4, S. 651.
Holotype: Sweden, Dalsland, Ödskölt par., 1 km outside the village, next to the street to Uleviken, leg. E. Hagström, 24.08.1975, Herbarium GB.
Select illustration:
![[image]](micros1i.gif)
Macromorphology:
Resupinate, smooth, verrucose to odontoid, cream-coloured to beige, margin blurred, up to 100 µm thick.
Micromorphology:
- Spores:
- 2.5-4.5 x 1.5-2.5 µm, ellipsoid to cylindric, thin-walled, smooth, inamyloid, spores in herbarium specimens without droplets.
- Basidia:
- 8-13 x 3-4 µm, young clavate, mature cylindric to suburniform with one slight median constriction and one basal clamp each.
- Sterigmata:
- Four, 3 µm long.
- Cystidia:
- Tubular tramacystidia, apical 5-8 µm in diameter, basal up to 3-4 µm in diameter, several 100 µm long, walls up to 2 µm thick, apical thin-walled and there without or with several crusty-like exsudat, which is not soluble in 5% KOH solution. The cystidia arise from the basal hypae of the fruit body with one basal clamp each and are mainly grouped in the center of the aculei.
- Clamps:
- All primary septa with one clamp each.
- Hyphae:
- Hyphal system monomitic. Basal hyphae 2-3 µm in diameter, slightly thick-walled (0.5-1 µm). Hyphal running in the subiculum very loosely. In basal parts of the basidiocarp hyphae are running parallely to thesubstrate (compare with H. efibulata!). Subhymenial hyphae 2-3.5 µm in diameter, thin-walled, strong branching.
- Aculei:
- In the center of the aculei generative hyphae are running between the tubulare tramacystidia. Basidia are produced up to the top of the aculei.
Habitate and substrate:
Strongly decayed wood. Pinus, Betula, Salix, Araucaria.
Biogeography:
To me only four spcimens listed below are known. They cover as well the tropical Africa and South America as Europe. Two specimens from the USA come from Gilbertson & Blackwell (1988). Wu (1990) describes specimens from Taiwan. This distribution makes it possible, that this species is really very rare, especially because there are no unusual substrates or habitates recorded.
Remarks:
H. microspora is related to H. efibulata. H. efibulata possibly is only a parthenogenetical form of H. microspora . Both species have common characters:
- Cystidia apical incrusted
- Generatic hyphae up to the top of the aculei
- Hyphae in the subiculum
H. efibulata and H. microspora only could be distingished by the morphology of their spores, basidia and septa:
|
| Spores
| Basidia
| Septa
|
| H.efibulata
| 5.5-8 x 2.5-3.5 µm
| two spored
| without clamps
|
| H. microspora
| 2.5-4.5 x 1.5-2.5 µm
| four spored
| with one clamp each
|
Herbarium specimens:
Sweden, Dalsland, Ödskölt par., 1 km outside the village, next to the street to Uleviken, on a Betula branch on an old wood pile, E. Hagström, 24.08.1974, Hjm 18578, Herbarium GB.
Italy, Giardini (Livorno), on cf. Salix sp. or cf. Myrta sp., leg. A. Bernicchia, 27.10.1982, Bernicchia 993, Herbarium O.
Brazil, Paranį, Rio Azul via Sįo Paolino (near Irati), 890 m alt., on Araucaria angustifolia (fallen tree), leg. S. Plank & M.F. Broggi, 17.01.1981, Stefan Plank S-Am/Bras No. 72, Herbarium GB.
Malawi, Southern district, Zomba Distr., Zomba Plateau, 1500-1700 m alt., 15°20“S 35°20“E, leg. L. Ryvarden, 06.-07.03.1973, LR 11286, Herbarium O.
Go to:
Dr. Ewald Langer - 27. Febr. 1996
ewald.langer@uni-tuebingen.de