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 Phaeomarasmius aureosimilis
SynonymsTubaria aureosimilis
BiostatusPresent in region - Indigenous. Endemic
Images (click to enlarge) | 
Caption: Dried type specimen
Owner: Herb PDD | 
Caption: ZT69-113, Holotype
Owner: E. Horak: © Creative Commons Attribution-Noncommercial 3.0 New Zealand | 
Owner: J.A. Cooper | 
Owner: J.A. Cooper | 
Owner: J.A. Cooper | 
Caption: cheilocystidia and chrysobasidia (KOH)
Owner: J.A. Cooper | 
Caption: cap terminal hyphae
Owner: J.A. Cooper | 
Caption: spores
Owner: J.A. Cooper |
Article: Horak, E. (1980). Fungi Agaricini Novazelandiae. VIII. Phaeomarasmius Scherffel and Flammulaster Earle. New Zealand Journal of Botany 18(2): 173–182 (http://www.rsnz.org/publish/abstracts.php).
Description: Pileus -25 mm, hemispheric when young, becoming convex to plane with depressed centre, margin incurved also in aged specimens; yellow-brown, velutinous to felly; dry, hygrophanous; margin not striate, with distinct yellow fibrils from the veil (at least in young carpophores). Lamellae (L 12-18,7-) 15), crowded; broadly adnate to emarginate; golden-yellow when young becoming yellow-brown with age, edge albofimbriate. Stipe -25 x -2.5 mm, cylindric, equal, often curved, central; concolorous with pileus, base brown; densely covered with appressed longitudinal fibrils, with distinct but evanescent yellow cortina; dry, hollow, single in groups, with yellow-brown basal tomentum. Context yellow-brown. Odour not distinctive. Taster mild. Chemical reactions on pileus: KOH, NH? - brown; H2S04, HCI - negative. Spores 7-8 x 4-5 µm, phaseoliform, brown, membrane thin-walled, smooth, germ pore absent. Cheilocystidia 30-50 x 15-20 µm, clavate to vesiculose, membrane hyaline to yellow-brown, occasionally encrusted with yellow-brown pigment, clamp connection at basal septum. Pleurocystidia absent. Caulocystidia cylindric, not differentiated. Cuticle a trichoderm of suberect to erect cylindric hyphae, terminal cells cystidioid (conic to fusoid), membranes not gelatinised, encrusted with brown (KOH) pigment. Clamp connections numerous at septa.
Habitat: on rotten log of Nothofagus solandri (Hook.f.) Oerst. var. cliffortioides (Hook.f.) Poole. New Zealand.
Notes: In the field this yellow-brown species can be mistaken for a species of Gymnopilus Karsten. This New Zealand fungus is a close relative of the following two European species of Phaeomarasmius, viz, P. muricatus (Fr. ex Fr.) Singer and P. limulatus (Fr. ex Weinm.) Singer. It can be distinguished by the size and shape both of the spores and cheilocystidia and in addition by the rather tomentose structure of the pileocutis.
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