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Remarks (internal):Pilát (1937) described Leptoporus wynnei f. ellipsosporus from a specimen collected by Krawtzew from Pinus cembra subsp. sibirica in Siberia. Romagnesi (1944) raised the form to species rank as Leptoporus ellipsosporus. Kotlaba & Pouzar (1989) and Ryvarden & Gilbertson (1994: 696) showed the type to belong to the Antrodiella semisupina complex; they also discussed the complicated nomenclature of this taxon. We restudied the lectotype. It is small and young but in a rather good condition. Substrate is strongly brown-rotted gymnosperm wood, Pinus sibirica according to the label, supported by microscopic analysis (by Pirkko Harju, H). Macroscopy, gymnosperm host and spore size point towards Antrodiella pallasii, but that species has shorter, uniguttulate spores, narrower skeletals with distinct lumen in subiculum, and it is a follower of Trichaptum abietinum (Pers. : Fr.) Ryvarden, a white-rot fungus. Antrodiella faginea has clearly shorter and more ellipsoid spores and it grows on angiosperms. Antrodiella pallescens comes closest microscopically; its spores are slightly narrower and more uniformly straight cylindrical. Ecology is different: A. pallescens is restricted to angiosperm hosts and follows Fomes fomentarius, which is a white-rot fungus. We accept Pilát's taxon as a good species, and hence make the necessary combination. Yet new material is needed to establish the identity of this species. 
Description type:Non-original description 
Description:Antrodiella ellipsospora (Pilát) Niemelä & Miettinen, comb. nov. (MB500769)
Basionym: Leptoporus wynnei f. ellipsosporus Pilát, Bull. Soc. Mycol. France 52:306, 1937. Leptoporus ellipsosporus (Pilát) Romagn., Bull. Soc. Mycol. France 60:88, 1944. Lectotype: Russia, Sayany, Arasuk, Pinus [cembra subsp.] sibirica, 1.IX.1932 [B.I.] Krawtzew (PRM 25017, studied). Selected as type by Kotlaba & Pouzar (1989:39).
Pileate, white to cream-coloured, hard when dry. Caps fingernail-shaped, strongly curved when dry, 10 mm wide, up to 2 mm thick, projecting 5 mm, surface matt, margin sharp. Pores 7-9 per mm, orifices entire, walls not appearing fragile. Section: context cream-coloured, hard when dry, tubes concolorous. Dimitic, generative hyphae with clamp connections, 2-3.2 µm in diam., skeletals CB(+), IKI-, interwoven and dominating except close to substrate and tube mouths, in subiculum (2.6-)3-3.5(-3.8) µm in diam., in tube trama 2.2-3(-3.3) µm, lumen narrow and indistinct in subicular skeletals, wide to narrow in trama. Basidia with 4 sterigmata, 8.5-12 x 3.7-4.6 µm. Spores ellipsoid to short cylindrical, thin-walled, CB-, IKI-, 3.2-4(-4.1) x 1.8-2.1(-2.3) µm, ventral side convex, flat, or slightly concave.
 
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