Hyphodontia latitans
(Bourd. & Galz.) E. Langer comb. nov.
Select illustration:
![[image]](latita1i.gif)
Basionym:
= Poria latitans Bourd. & Galz. 1925, Hym. de France 41: 226. (Basionym)
Synonym:
= Chaetoporellus latitans (Bourd. & Galz.) Bond. & Singer in Singer 1944, Mycologia 36(1): 67.
Type: France, Causse Noir, on Pinus, leg. A. Galzin, 04.12.1910. No. 29007 (in Hym. de France No. 698), Herbarium S.
Macromorphology:
Resupinate, irpicoid to poroid, white to yellowish, pores grow positively geotropic, up to 2 mm long, pores walls up to 300 µm thick, at the margin the pores walls become lower and fade into corticioid mycelium
Micromorphology:
- Spores:
- 3-4 x 0.5-1 µm, narrow allantoid, thin-walled, smooth, inamyloid, apiculus even with high magnification (2000x) hardly visible.
- Basidia:
- 7-10 x 3-4 µm, young clavate, mature cylindric to clavate with one median constriction and one basal clamp each.
- Sterigmata:
- Four, up to 2 µm long.
- Cystidia:
- Tubular, thin-walled tramacystidia, up to 50 µm long, 4-5 µm in diameter, with several constrictions and basal clamp, apikal obtuse. They arise from the subhymenium or from subicular hyphae just under the subhymenium. 3%-ious Ploxin solution dyes their content more than the surrounding hyphae.
- Clamps:
- All primary septa with on clamp each.
- Hyphae:
- Hyphal system monomitic. Subiculare hyphae 2.5-4 µm in diameter, thick-walled (up to 1 µm). Hyphal running in the pores walls more or less parallel, subicular hyphae running undirected. Subhymenial hyphae 2-4 µm in diameter, thin-walled. Hyphal branching by subseptal outgrowing or outgrowing of clamps.
- Pores:
- The inner walls of the pores are totally coated with hymenium, only the pore margins are built of sterile, endhyphae which are thin-walled and obtuse.
Habitate and substrate:
Coniferous forests, Pinus, Larix.
Biogeography:
H. latitans is a rare species. Eriksson & Ryvarden (1973) mention no specimens for Scandinavia. The known specimens are all from temperate to boreal, northern hemispherical areas.
Remarks:
Bondartsev (1953) treated all species having a poroid hymenium under the genus name Chaetoporellus. Ch. litschaueri (Pil.) Bond. or Ch. aureus (Peck.) Bond e.g. have thick-walled cystidia with crystaline incrustation. The old type of the genus, Ch. latitans (Bourd. & Galz.) Bond. & Singer in Singer, has in contrary thin-walled, tubular tramacystidia. The genus concept of Chaetoporellus favoured by Eriksson and Ryvarden (1973) includes the characters of poroid hymenium, thin-walled tramancystidia but also allantoid to semicircle-like curved spores.
The genus name Hyphodontia John Eriksson was coserved agaist Chaetoporellus Bond. & Singer (Gams 1993).
H. latitans is the only representativ of the genus Hyphodontia which has the character combination of a poroide hymenium and tubular, thin-walled tramacystidia. This cystidial type are also found in two other odontioid species, which are very similar to H. latitans: H. curvispora and H. alutacea:
Hymenium odontioid
Spores very narrow allantoid............H. alutacea
Spores semicircle-like curved...........H. curvispora
Hymenium irpicoid up to poroid..............H. latitans
Herbarium specimens:
France, Causse Noir, on Pinus, leg. A. Galzin, 04.12.1910. No. 29007 (Hym. Fr. Nr. 698), Herbarium S.
Germany, Sachsen, Chemnitz, on decaying wood, leg. A. Kmet, 04.07.1889, Herbarium S.
USA, Arkansas, Calico Rock, leg. J.L. Lowe, 27.08.1951, No. 5141, Herbarium S.
USA, Arkansas, Harrison, leg. J.L. Lowe, 26.08.1951, No. 5117, Herbarium S.
USA, Tennessee, Great Smokey Mountains National Park, Cades Cove, on Pinus sp., leg. R.L. Gilbertson, 05.08.1963, No. 3921, Herbarium S.
USA, North Carolina, Asheville, Bent Creek, Exp. Forest, on Pinus sp., leg. R.L. Gilbertson, 28.07.1963, Herbarium GB.
GUS, Jakutsk, Spasskaja Padj., on Larix dahurica, leg. E. Parmasto, 09.09.1972, TAA 56889, Herbarium TAA, GB.
GUS, Jakutsk, Olenjok, on Larix dahurica, leg. E. Parmasto, 27.07.1972, TAA 56523, Herbarium TAA, GB.
Go to:
Dr. Ewald Langer - 27. Febr. 1996
ewald.langer@uni-tuebingen.de