Hyphodontiella multiseptata
Strid 1975, Kungl. No. Vid. Selsk. Skr. 4: 19.
Holotype: Norway, Rössvollhei, north of Mo i Rana, on a Alnus incana branch, leg. Åke Strid, 18.10.1970, No. 8033, Herbarium GB.
Select illustration:
![[image]](multis1i.gif)
Macromorphology:
Resupinate, smooth, white, substrate shining through, margin thinning out, up to at most 100 µm thick.
Micromorphology:
- Spores:
- 5.5-6.5 x 3-3.5 µm, navicular (= ship-like formed), similar to the typical spore form of many Botryobasidium species, smooth, thin-walled, inamyloid, with one droplet each.
- Basidia:
- 12-15 x 4-6 µm, young clavate, mature clavate up to cylindric with one median constriction and basal clamp each.
- Sterigmata:
- Four, 2.5-3 µm long.
- Cystidia:
- None
- Clamps:
- All primary septa with one clamp each.
- Hyphae:
- Hyphal system monomitic. Subiculare hyphae 2-3 µm in diameter, thin-walled up to thick-walled (< 0,5 µm), very loosely hyphal ramification. Subhymenial hyphae 3-4 µm in diameter, thin-walled, very densely hyphal ramification because of outgrowing of clamps. In the hymenium many collapsed basidia are present. Clamps are characteristically formed, their radius most time is the same as the diameter of the hyphae. The basal hyphae often have simple septa without clamps. At high magnification (> 1000 times) the caps of the septal pores may be seen in a phase optics microscope. Hyphal branching by subseptal outgrowing or outgrowing of clamps.
Habitate and substrate:
Salix and Alnus on mold or wet places. The substrate combination (Salix: Dilleniidae, Alnus: Hamamelididae) has only an ecological importance.
Biogeography:
Until now the records are limited to Scandinavia. Strid (1975) and Kotiranta & Saarenoksa (1990) give a list of specimens.
Remarks:
H. multiseptata has common characters with the genus Botryobasidium and Hyphodontia. Especially the navicular spore form is characteristic in the genus Botryobasidium. The characteristical spore droplet however is lacking in some Botryobasidium species and in contrary appears in nearly all species of the genus Hyphodontia. The pattern of the hyphal branching could be distinguished from the hyphodontioid one, which normally appears by simple branching of the outgrowings of clamps. The basidia form is comparable to the suburniform basidia of the genus Hyphodontia. The hymenium of H. multiseptata however is not thickening as much as in the genus Hyphodontia. It is built of a loosely arranged basidia with a meagre subhymenium.
The uniqueness of the spore form of H. multiseptata, the total lacking of cystidia and a different pattern of hyphal branching exclude a position within the genus Hyphodontia.
Go to genus description of Botryobasidium
Go to genus description of Hyphodontia
Herbarium specimens:
Norway, Rössvollhei, north of Mo i Rana, on an Alnus incana branch, leg. Åke Strid, 18.10.1970, No. 8033, Herbarium GB.
Norway, Sør-Trøndelag, Dovre National park, ca. 900-1200 m alt., on Salix sp., leg. K. Hjortstam, 15.08.1983, Hjm 13586, Herbarium GB.
Norway, Norland, Lødningen, Kanstad, on Salix, leg. K. Bl¿rgum, 05.10.1976, Herbarium O.
Sweden, Torne Lappmark, Tornehamn, between Tornehamnväxel and Tornehamnstuga, on Salix sp., leg. J. Eriksson, 16.08.1960, Eriksson 8882, Herbarium GB.
Sweden, Torne Lappmark, Abisko near Vuolep Njakajaure, leg. J. Eriksson, 16.08.1960, Eriksson 8872, Herbarium GB.
Sweden, Norrbotten, Råneå, Rörbäck, on Alnus incana, leg. Åke Strid, Nr. 10401, Herbarium GB.
Sweden, Dalsland, Ödeborg near Alekusen, on Salix sp., leg. K.-H. Larsson & K. Hjortstam, Sept. 1977, Herbarium GB.
Go to:
Dr. Ewald Langer - 27. Febr. 1996
ewald.langer@uni-tuebingen.de