Accepted as Tyromyces stramenticus.
A good description is given in the protologue. Characteristic features of the species include the coarse bundles of agglutinated hyphae covering the pileus surface, the agglutinated hyphae of both context and dissepiments, lacerate pore mouths, and the small spores measuring 2.5-4 x 2-2.5 µm. The hyphal system is monomitic with the clamped generative hyphae only readily separable at the margin.

Holotype: PDD 11038 - New Zealand, Taupo, Mt Ruapehu, Whakapapaiti Stream, Jan. 1951, J.M. Dingley, on Nothofagus solandri (Hook. f.) Oerst. var. cliffortioides (Hook. f.) Poole.

MATERIAL STUDIED: New Zealand, Wellington, Mt Ruapehu, Wakapapaiti, on Nothofagus solandri var. cliffortioides, J.M. Dingley, 1.1951, PDD 11038 (holotype of T. stramenticus); Taupo National Park, Station Bush, on Nothofagus fusca, S.D. Baker, 1.1954, PDD 13331; Westland, Arthur's Pass National Park, Kellys Creek, Cockayne Natural Walk, on fallen trunk, M. Rajchenberg 10074, 6.V.89, BAFC; Mt Aspiring National Park, Haast Pass, Roaring Billy Forest Walk, in Podocarpus + Nothofagus menziesii forest, on dead standing tree, M. Rajchenberg 10095, 8.V.89, BAFC; ibid., on fallen trunk of Nothofagus menziesii, M. Rajchenberg 10096, 8.V.89, BAFC. Argentina, Rio Negro, Nahuel Huapi National Park, Puerto Blest, track to Los Cantaros, M. Rajchenberg 3883, 16.111.87, BAFC 31009; ibid., M. Rajchenberg 3886, 16.111.87, BAFC 31010; Neuquen, Los Lagos, Lago Pire, M. Rajchenberg 3905, 18.111.87, BAFC 31008 (holotype of S. australis).
CULTURES STUDIED: BAFC/cc 2067, from specimen BAFC 31009. BAFC/cc 2098, from specimen BAFC 31010. BAFC/cc 499, from specimen M. Rajchenberg 10095. BAFC/cc 507, from specimen M. Rajchenberg 10096 (above).

Skeletocutis stramenticus (G.H. Cunn.) comb. nov.
REMARKS: Contrary to Cunningham's (1965) description, this species is not pileate but effused resupinate. It is very easily detachable from the substrate to show the narrow basal point of attachment. The subicular hyphae on the surface are radially arranged and give the impression that the "pileus" is "covered with coarse radiating and branched fibrils of agglutinated hyphae" (Cunningham 1965). These hyphae are the only ones bearing the highly characteristic crystals of the genus Skeletocutis (Keller 1979; David 1982). The crystals are almost absent in the dissepiments' trama, as is usual in this genus. Skeletal hyphae are difficult to observe because of the right arrangement of the hyphae. Nevertheless, they are easily recognised with cresyl-blue in the dissepiments, where they are the only hyphae to give a metachromatic reaction. New Zealand collections of S. stramenticusincluding the holotype are morphologically similar in all respects to the southern South American Skeletocutis australis (Rajchenberg 1987).
I studied several fresh specimens from New Zealand and was able to perform cultural studies as well as to determine the sexuality and the nuclear behaviour. All these features were similar to those described for S. australis. Tester strains were selected and used to perform compatibility tests between specimens from Argentina and New Zealand. The results are shown in Table 1. A high degree of compatibility (88%) was found, indicating conspecificity. The New Zealand name, having priority, is therefore transferred to the genus Skeletocutis because of the resupinate habit, the dimitic hyphal system, the presence of characteristic crystals, tetrapolarity, and heterocytic nuclear behaviour.