Hyphodontia tenuicystidiata
Hjortst. & Ryv. 1986, Mycotaxon 28(1): 17.
Holotype: Argentina, Prov. Missiones, Iguazu National Park, Cataratas de Iguazu, leg. L. Ryvarden, 01.-05.03.1982, LR 19523, Herbarium O.
Select illustration:
![[image]](tenuic1i.gif)
Macromorphology:
Resupinate, smooth to finely tuberculate, ochraceous, margin thinning out, up to ca. 200 µm thick.
Micromorphology:
- Spores:
- 5-6 x 2.5-3 µm, ellipsoid, thin-walled, smooth, inamyloid, with one droplet each.
- Basidia:
- 20-25 x 3-4 µm, suburniform with one up to two constrictions and one basal clamp each, often basidial repetition.
- Sterigmate:
- Four, 3-3.5 µm long.
- Cystidia:
- Cystidia basal ventricose, apical with hypha-like outgrowing, ca. 50-100 µm long, basal 4-7 µm in diameter, with one basal clamp each. They arise from the hyminium.
- Clamps:
- All primary septa with one basal clamp each.
- Hyphae:
- Hyphal system monomitic. No differences between subiculum and subhymenium. Hyphae 2-4 µm in diameter, all hyphae thin-walled. Characteristical for this species is the thickening hymenium. While the hymenial is growing, collapsed basidia and candelaber are left behind. Because of this it is very difficult to analyze the hyphal texture. Hyphal branching by outgrowing of clamps or subseptal outgrowing.
Habitate and substrate:
No precise records available.
Biogeography:
Until now only known from South America (Hjortstam 1987).
Remarks:
H. knysnana and H. nudiseta have similar cystidia like H. tenuicystidiata. This type of cystidia is basal ventricose and is elongated in a long, thin hypha-like outgrow. On the contrary to H. knysnana, H. tenuicystidiata has a smooth to slightly verruculose hymenium and more narrow spores.
Hymenium odontioid
Cystidia up to ca. 75 µm long.........H. knysnana
Cystidia up to ca. 50 µm long.........H. nudiseta
Hymenium smooth to slightly warzig
Cystidia up to ca. 150 µm long........H. tenuicystidiata
Herbarium specimens:
Argentina, Prov. Missiones, Iguazu Nationalpark, Cataratas de Iguazu, leg. L. Ryvarden, 01.-05.03.1982, LR19523, Herbarium O.
Go to:
Dr. Ewald Langer - 28. Febr. 1996
ewald.langer@uni-tuebingen.de