Synonymy:
Poria crocata Pat., J. Bot., Paris 8(12): 220 (1894)
Rigidoporus crocatus (Pat.) Ryvarden, Occ. Pap. Farlow Herb. Crypt. Bot. 18: 13 (1983)
Physisporinus crocatus (Pat.) F. Wu, Jia J. Chen & Y.C. Dai, in Wu, Chen, Ji, Vlasák & Dai, Mycologia 109(5): 760 (2017)

Poria nigrescens Bres., Atti Imp. Regia Accad. Rovereto, Ser. 3 3(1): 83 (1897)
Perenniporia nigrescens (Bres.) Murrill, Mycologia 34(5): 595 (1942)
Podoporia nigrescens (Bres.) Bondartsev, Trut. Grib Evrop. Chasti SSSR Kavkaza [Bracket Fungi Europ. U.S.S.R. Caucasus] (Moscow-Leningrad): 137 (1953)
Rigidoporus nigrescens (Bres.) Donk, Persoonia 4(3): 341 (1966)

Physisporus microsporus P. Karst., Öfvers. Finska Vetensk.-Soc. Förh. 46(no. 11): 8 (1904)
Poria microspora (P. Karst.) Sacc. & D. Sacc., Syll. Fung. (Abellini) 17: 133 (1905)

Position in classification:
Meripilus, Meripilaceae, Polyporales, Incertae sedis, Agaricomycetes, Basidiomycota, Fungi

Note:
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