Hyphodontia breviseta

(Karst.) John Eriksson 1958, Symb. Bot. Ups. 16(1): 104.

Synonyms:

= Kneiffia breviseta Karst. 1886, Hedw. 25: 232.
Lectotype: Finnland, Tavastia, Tammela, Mustiala, Saloinen, leg. Karsten, 01.08.1886, Nr. 1276, Herb. Karsten, Herbarium H.
= Odontia lactea Karst. 1887, Symb. Myc. Fenn IX, p. 51.

Select illustration:

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Macromorphology:

Resupinate, odontioid, cream-coloured, margin thinning out; without aculei up to 1 mm thick, aculei up to ca. 1 mm long. Colour photo in Breitenbach & Kränzlin (1986), photo No. 79.

Micromorphology:

Spores:
4-6 x 3-4 µm, ellipsoid, smooth, thin-walled, inamyloid, with one droplet each.
Basidia:
14-30 x 3-5 µm, young cylindrical or clavate, mature suburniform with 1-2 median constrictions and one basal clamp each.
Sterigmata:
Four, 3-4 µm long.
Cystidia: Clamps:
All primary septa with one clamp each.
Hyphae:
Hyphal system monomitic. Hyphae 2-3 µm in diameter, thin-walled up to thick-walled (Aculei:
Endhyphae of the aculei can be obtus to subulate and show a characteristical incrustation of globose crystals (up to 5 µm in diameter). The basidiocarps are often infected with a hyphomycet (Denticuaria limoniformis de Hoog). The conidiophors of this hyphomycet are mainly in the top of the aculei.

Habitate and substrate:

Mainly on white-rotten coniferous wood: Pinus, Picea, Pseudotsuga, Juniperus. Seldom on Angiosperms wood.

Biogeography:

In the moderate areas of the northern hemisphere this species is very abundant. From subtropical to tropical areas only some records from the Canaries (Ryvarden 1976) and Africa are known. Wu (1990) describes and illustrates one specimen from Taiwan. The micromorphological characters fit very good to the specimens investigated here.

Remarks:

Vouchers from temperate areas show a uniform micromorphology, whereas specimens from tropical areas vary considerably. This variability concearns the incrustation, the length of basidia and cystidia and the cyanophile reaction of the hyphae. In tropical material the moniliform cystidia may be present in different number and are difficult to observe. It is absolutely necessary to use Phloxin staining to observe moniliform cystidia. The variabilty point towards a species complex which can not be divited by micromorphology. The illustrated vouchers show in the links show normal examples and extremes in respect of incrustation and presence of cystidia. In the investigated material many intermediate forms are present.
There are three odontioid forms with moniliform cystidia. Their spore sizes are overlapping. 

Capitate cystidia present
   Aculei very small, not more than 1mm long.....H. breviseta
   Aculei up to 2 mm long, round to spathulate...H. spathulata
Capitate cystidia absent.........................H. mollis

Herbarium specimens:

Finnland, Tavastia, Tammela, Mustiala, Saloinen, leg. P.A. Karsten, 01.08.1886, Herb. Karsten Nr. 1276, Herbarium H.
Norway, Åkershus, Nannestad, Tųmte, ca. 300 m alt., leg. E. & G. Langer, 18.09.1990, GEL 2139, Herbarium G. & E. Langer.
Sweden, Småland, Värnamo, Björs, on Picea abies, leg. B. & J. Eriksson, 06.11.1965, Eriksson 9185, Herbarium GB.
Sweden, Småland, Femsjö sn., northern slope of Dullaberget, on the underside of a Fagus sp. log, leg. S. Lundell, 10.08.1937, Lundell 1484, Herbarium GB.
Germany, Baden-Württemberg, Tübingen, Hagelloch, street from Hagelloch to Heuberger Tor, ca. 450 m alt., on wood and bark of Pinus sylvestris, leg. E. Langer, 12.10.1988, GEL 766, Herbarium G. & E. Langer.
Germany, Baden-Württemberg, Tübingen, Morgenstelle, University campus, on bark of Pinus sylvestris, ca. 450 m alt., leg. E. Langer, 12.11.1987, GEL 574, Herbarium G. & E. Langer.
Slowakia, Karpatia, Klausura Hoverla near Bogdan, on wood, leg. A. Pilįt, July 1928, Pilįt 4929, Herbarium PR.
Canada, British Columbia, Vancouver Island, Lake Cowichan provincial forest, on Pseudotsuga menziesii, leg. B. & J. Eriksson, 12.09.1967, Eriksson 7985, Herbarium GB.
USA, Montana, Stanton Creek, Flathead National Forest, on Picea engelmannii Parry, leg. R.L. Gilbertson, 13.08.1963, Gilbertson 3649, Herbarium GB.
Turkey, Northeast Anatolia, Trabzon, monastery Sumela, 1000-1400 m alt., Picea-log, leg. N. Hallenberg, 02.-12.10.1989, NH 11585, Herbarium GB.
Tanzania, Morogoro Prov., Morogoro Distr., Uluguri Mts., Morning Side Res. station, ca. 5 km sounth of Morogoro, ca. 1500-2100 m alt., 6°55S 37°40E, leg. L. Ryvarden, 24-26.02.1973, LR 11059, Herbarium O.
Tanzania, Kilimanjaro Prov., Mt. Kilimanjaro, western slope, West-Kilimanjaro Forst Sta., ca. 1800 m alt., 3°S 37°8E, leg. L. Ryvarden, 10.-11.02.1973, LR 10161, Herbarium O.
China, Jilin Prov., Chang Bai Shan Forest Reserve, Hangcon gou, 750 m alt., on Pinus koraiensis, leg. L. Ryvarden, 11.-17.11.1983, LR 21699, Herbarium O.

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Dr. Ewald Langer - 27. Febr. 1996
ewald.langer@uni-tuebingen.de