Hyphodontia hastifer

Hjortst. in. herb.
Holotype: Argentina, Prov. Missiones, Iguazu Nationalpark, on bark of, leg. L. Ryvarden, 01.-05.03.1982, LR 19767, Herbarium K.
Paratype: LR 19819, Herbarium K.

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Macromorphology:

Resupinate, odontioid, white, margin thinning out, aculei up to ca. 300 µm high, fertile, apical fimbriate, without aculei up to ca. 150 µm thick.

Micromorphology:

Spores:
4.5-5 x 4-4.5 µm, subglobos, thin-walled, smooth, inamyloid, with one droplet each.
Basidia:
20-25 x 4-5 µm, young clavate, mature suburniform, with one basal clamp each.
Sterigmata:
Four, up to 3 µm long.
Cystidia:
1. Ventricose cystidia with long extended tops, up to ca. 50 µm long, basal up to 5 µm wide, thin-walled, with one basal clamp each, only lokalized in the hymenium.
2. Hastocystidia, subulate, 40-60 µm long, 6-8 µm wide, only lokalized in the tops of the aculei, thin-walled, with one basal clamp each.
3. Capitate hyphal endings in the subiculum, apical up to 10 µm diameter. They secrate big crystalls, which are up to 25 µm big and not soluble in 5% KOH solution.
Clamps:
All primary septa with one clamp each.
Hyphae:
Hyphal system monomitic. Basal and subiculare hyphea 3-5 µm in diameter, slightly thick-walled (up to 0.5 µm), hyphae loosely interwoven. Subiculum strong incrusted with crystalls (see above). Subhymenial hyphea 3-5 µm in diameter, thin-walled, strongly branched. In the hymenium often collapsed basidia present.
Aculei:
Clustered hastocystidia build the aculei, which are totally sterile.

Habitate and substrate:

Only one specimen found on bark from a subtropical, moist deciduous forest in Argentina.

Biogeography:

Argentina.

Remarks:

H. hastata and H. hastifera are the only species in Hyphodontia with the special character hastocystidia. They could be distinguished by their spores size and form.

H. hastifera H. hastata
Hymenium odontioid smooth up to verrucose
Hastocystidia grouped in the aculei in the hymenium
Spores 4.5-5 x 4-4.5 µm 5-7 x 2-3 µm
Spore form subglobos cylindric

Herbarium specimens:

Argentina, Prov. Missiones, Iguazu National park, on bark, leg. L. Ryvarden, 01.-05.03.1982, LR 19767, Herbarium K.

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Dr. Ewald Langer - 14. Febr. 1995
ewald.langer@uni-tuebingen.de