On the type of Coprinus rugoso-bisporus
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Original description
Coprinus rugoso-bisporus Geesink & Imler in Sterbeeckia 12: 9. 1979. Lectotype (designated here, see notes!): Netherlands: prov. Noord-Holland, Wieringermeer, Dijkgatbos, on dead branch of Acer, 18 Oct. 1970, J. Geesink (L).

Coprinus rugoso-bisporus

Instercore equine, in carhonaria operta, in rumo aceris. Pileo (5) - 20 - 30 mm alto, campanulato, plumbeo, altefulcato, floods albis vestito. Stipite (15) - 50 x (1-) 2 - 3 mm, allio, floccoso. Basidiis hisporis. Sporis atrofuseis, longe ovatis, hand glohoxis. verrucosis, 12 -13,75 x 8-8,75 um, verrucis multis, semiglohatis. interdum circum riorum hyalinis, hand acutis. Velo pilei ex hyphis ramosis, diverticulatis, fihulatis, 1,5 - 3 (-7) µm latis constante. Cute pilei ex hyphis jacentihus, inter se aequidistantibus, leviter brunneolis, fibulalis, 2,5 - 6 µm latis constante. Cystidiis in lateribus lamellarum vesicidosis, brevi pedunculo, 53-95 x 22-42 µm. Cellulis aciei ovatis, 51 - 36 µm. - In Herbaria Imler Copr. 4; holotypus 25-4-65. In Herhario Geesink: holotypus 18-10-70. Geesink, J. & Imler, L., 1979. Coprinus rugosobisporus nov. sp. STERBEECKIA 12: 9 + tav.

Observations:
Spores [40,1,1] 9.0--11.4 x 7.0--9.1 µm, dark red-brown, ovoid, warty; Q= 1.15--1.40, av. Q= 1.30; av. L= 10.3--10.5, av. B= 7.9--8.1 µm. Germ pore central. Basidia 16--34 x 6--8 µm, 2-spored, surrounded by 3--6 pseudoparaphyses. Pleurocystidia 50--130 x 28--50 µm. Cheilocystidia 40--100 x 17--45 µm. Veil 3--10 µm wide, thin-walled. Clamp-connections present.

Notes: Imler and Geesink designated two collections as holotype, viz.: Belgium: St. Mariaburg/Ekeren, 25 Apr. 1965, on charcoal, L. Imler Copr. 4, (holotype, Imler) and the Netherlands: prov. Noord-Holland, Wieringermeer, Dijkgatbos, on dead branch of Acer, 18 Oct. 1970, J. Geesink (L). Since only one collection can be considered as type, here we choose the collection from the Netherlands as lectotype. The original description is very extensive with drawings of the species and related species.

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