New Zealand: Westland, Hari Hari, Big Wanganui; 18.11.1969,leg. Horak (PDD 27137, holotype; ZT 69/94, isotype).

Pileus - 18 mm, dimidiate conchiform or reniform, margin incurved and irregularly waved in aged carpophores, pale yellow, golden yellow or pale yellow-brown, paler towards the margin, velutinous to substrigose near point of attachment, smooth along estriate margin, dry. Lamellae eccentrically or laterally concurrent, ventricose, crowded, yellow-brown (like Cortinarius cinnamomeus), edge albofimbriate. Stipe lacking or present, rudimentary, usually absent in aged specimens, laterally attached to substratum, single, in dense groups. Odour and taste not distinctive. Context yellow, gelatinous stratum absent. Chemical reactions on pileus: KOH and NH3-negative. Spore print: deep (chocolate) brown. Spores 5-6.5 µm., subglobose, apiculus distinct, covered with coarse hemispherical warts embedded in perispor, yellow-brown (KOH). Basidia 17-20/ 6-8 µm., 4-spored. Cheilocystidia 20-40/5-8 µm, subfusoid to cylindrical, thin-walled, hyaline, here and there covered with hyaline crystals or amorphous incrustations. Pleurocystidia absent. Cuticle a cutis or trichoderm of cylindrical, hayline, thin-walled hyphae (2-4 µm. diam.), membranes not gelatinized. Clamp connections present. Yellow pigment dissolves well in KOH.

Pileo -18 mm lato, dimidiate, conchato vel flabelliformi, sordide flavo vel aureo-brunneo, velutino-strigoso. Lamellis excentrice vel lateraliter concurrentibus, laete aureo-brunneis vel cinnamomeis. Stipite sive nullo sive rudimento. Sporis 5-6.5 µm, subglobosis, verrucosis, aureobrunneis, Cheilocystidiis 20-40/5-8 µm, subfusoideis vel cylindraceis, hyalinis, tenuitunicatis, cristalliferis. Ad ramosputridos Freycinetiae. Nova Zeiandia.

According to present knowledge in New Zealand there are two species of Crepidotus with crystal-bearing cheilocystidia. The first, Cr. parietalis, is well defined due to its relatively large-sized carpophores, yellow colour and thin-walled cheilo-cystidia. The second species, Cr. nanicus, is described above. For further discussion see Cr. aureus.

Holotypus PDD 27137.