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 Add this item to the list  Mycena luxarboricola

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 Summary:Mycena luxarboricola Desjardin, B.A. Perry & Stevani, Mycologia 102 (2): 467 (2010) [MB#515162] 
 MycoBank #:515162 
 Authors:Desjardin, B.A. Perry & Stevani 
 Authors (abbreviated):Desjardin, B.A. Perry & Stevani 
 Page #:467 
 Year of effective publication:2010 
 Date public:2010-04-13 09:00:36 
 Remarks:Distinctive features of Mycena luxarboricola include: a small, pale brown to ochraceous, dry pileus; arcuate, pallid, non-marginate lamellae; a small, dry, pruinose stipe; lignicolous basidiomes that are entirely luminescent and grow on the bark of living trees; globose to subglobose, strongly amyloid basidiospores with mean 8.5 × 8.0 µm; broadly clavate, densely spinulose cheilocystidia; an absence of pleurocystidia; non-gelatinous, cutis-type pileipellis and stipitipellis of densely spinulose hyphae; and dextrinoid, clamped tramal tissues. In combination, these features indicate placement in sect. Supinae, where it is allied with M. fera Maas Geest. & de Meijer, M. globulispora Maas Geest. & de Meijer, and M. recessa Maas Geest. & de Meijer, all described recently from the same Brazilian state of Paraná. Mycena fera differs in forming larger basidiospores (mean 10.5 × 10.2 µm), cheilocystidia with fewer (only 3–6) and longer diverticulae (5–24 × 2.5–10 µm), and lacks caulocystidia (Maas Geesteranus and de Meijer 1997, Desjardin et al. 2007). Mycena globulispora differs in forming a dark greyish brown pileus, white stipe, larger basidiospores in the range 9.8–10.7 × 8.9–10.3 µm, cheilocystidia with few apical spinulae, sparse pleurocystidia, and pileipellis and stipitipellis hyphae covered with few, relatively long and coarse diverticulae (Maas Geesteranus and de Meijer 1997). Mycena recessa differs in forming a stipe only up to 3 mm long, smaller basidiospores in the range 6.3–7.2 × 4.6–5.5 µm, cheilocystidia with few apical spinulae, smooth stipitipellis hyphae, and growth on bamboo twigs (Maas Geesteranus and de Meijer 1997).
Singer (1969, 1973) described two species from South America and one from Mexico referable to sect. Supinae and they differ from M. luxarboricola as follows. Mycena hypsizyga Singer, from Argentina, differs in forming a stipe 4-5 mm long, larger basidiospores in the range 9.5–13 × 8–11 µm, bisporic basidia, narrower cheilocystidia (3–7.5 µm diam), and lacks clamp connections (Singer 1969). Mycena melinocephala Singer, also from Argentina, differs in forming a yellow, umbilicate pileus, more subglobose to broadly ellipsoid basidiospores in the range 9–10.5 × 7–9.5 µm, and pileipellis hyphae with longer diverticulae (up to 10 µm long) (Singer 1973). Mycena abieticola, from Mexico, differs in forming ascending and broadly adnate lamellae, larger basidiospores in the range 10.5–13.5 × 8.5–12 µm, apparently 2-spored basidia lacking clamp connections, cheilocystidia with longer diverticulae (up to 12 µm long), predominantly unclamped hyphae, and grows on conifers (Abies religiosa) (Singer 1973). Of the known European and North American species of sect. Supinae, M. luxarboricola comes closest to M. supina (Fr.) Kummer. Mycena supina differs, however, in forming dark brown to dark sepia pilei, more numerous lamellae (11–17), and more densely pruinose stipes with abundant caulocystidia (Maas Geesteranus 1992, Robich 2003). Of the above mentioned phenetically similar species, only M. fera has been reported as luminescent (Desjardin et al. 2007).
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