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 Add this item to the list   Meruliopsis corium (Fr.) Ginns, comb. nov.
Page number:126 
Remarks (internal):The above synonymy is based on my study of type specimens, except that no type is known for M. corium. Additional synonyms that are cited in the literature include M. papyrinus Bull. ex Quélet, Polyporus eriophorus Berk. & Br., and Cladoderris platensis Speg., but authentic specimens have not been seen by me. Previous workers, particularly Burt (1917), separated several of the names here placed in synonymy on the basis of hyphal incrustations and spore size. Incrustations in M. corium seem to be dependent upon maturity of the basidiocarp and the substrate on which it grew (cf. the discussion of M. ambiguus). The range of spore sizes, particularly in length, that is found in a particular specimen also may reflect the quality of the environment at sporulation. Some basidiocarps have spores only 4 to 5 or 6 µm long, whereas other collections will yield spores 4 to 8 µm long.
The hymenial configuration in M. corium is generally predictable, but portions of sometropical collections have the hymenial folds short, interrupted, and quite wart-like. This occurrence of hymenial configurations typical of both Merulius and Phlebia in the same basidiocarp is further evidence that separation on the basis of hymenial configuration alone is certainly artificial.
Recently Professors E. J. H. Corner, Cambridge, and A. L. Welden, New Orleans, for-warded specimens from Venezuela and Costa Rica, respectively. Macroscopically the collections are similar to M. corium but differ in having a phlebioid to gyrose plicate hymenium, a thinner basidiocarp, and a distinctly zonate reflexed surface. Microscopically the specimens are similar to M. corium but differ in having smaller spores that may overlap the sizes of the shortest spores in M. corium. These collections are referred to Phlebia faviformis W. B. Cooke (Los Angeles County Mus., Contrib. in Sci., No. 24, pp. 3-7, 1958) and they have spores ovoid, adaxially flattened, 4-5(-6.5) x 2.3-2.9 µm, with the walls hyaline and thin; the basidia are slenderly clavate or clavate, four sterigmate, 18-26 x 4.5-6 µm. This species, which is described from Brazil, is probably congeneric with M. corium, but I have not seen the type.
Basidiocarps of Meruliopsis ambiguus can be distinguished from M. corium by their usually violaceous color and occurrence on gymnosperms. Meruliopsis taxicola, M. miniatus, and Ceraceomerulius albostramineus are also violaceous or dark purple but have small, allantoid or basally bent spores. Meruliopsis hirtellus and M. bellus have their hymenia white to cream, have thin-walled cystidia, and smaller spores than M. corium.
Description type:Non-original description 
Description:Meruliopsis corium (Fr.) Ginns, comb. nov.
= Thelephora corium, Fr., Syst. Mycol. I: 449. 1821;
= Merulius corium, Fr., Elenchus, I: 58. 1828;
= Byssomerulius c., Parmasto, Izv. Akad. Nauk Estonsk. S.S.R., Ser. Biol. 16: 383. 1967.
= Merulius confluens Schw., Nat. Ges. Leipzig Schr. I:92. 1822.
= Merulius pollens Schw., Trans. Am. Philos. Soc., NS, 4: 161. 1832, non Berkeley, 1841.
= Merulius aurantiacus Kl. in Berkeley in J. E. Smith "English Fl." 5(2): 128. 1836, non (Fr.) S. F. Gray, 1821.
= Merulius haedinus Berk. & Curtis, Grevillea, I: 69. 1872.
= Merulius sordidus Berk. & Curtis in Cooke, Grevillea, 19: 108. 1891.
= Merulius pelliculosus Cooke, Grevillea, 19: 109. 1891.
= Phlebia deglubens Berk. & Curtis, Grevillea, 20: 3. 1891. Merulius d., Burt, Ann. Mo. Bot. Gard. 4: 325. 1917.
= P. sodiroi Pat., Bull. Trimest. Soc. Mycol. Fr. 8: 116. 1892; Merulius s., Rick, Iheringia Bot. 7: 196. 1960.
= Merulius moelleri Bres. & P. Henn., Hedwigia, 35: 285. 1896.
= Phlebia blumenaviensis P. Henn., Hedwigia, 36: 198. 1897.
= Merulius stereoides P. Henn., Engler's Bot. Jahrb. 28: 335. 1901.
= Merulius ulmi Peck, N.Y. State Mus. Bull. 105: 26. 1906.
= Merulius hirsutus Burt, Ann. Mo. Bot. Gard. 4: 312. 1917.
= Merulius cubensis Burt, Ann. Mo. Bot. Gard. 4: 326. 1917.
= Merulius flavescens Bres., Ann. Mycol. 18: 41. 1920.
= Merulius ochraceus Lloyd, Mycol. Writ. 6: 1059. 1921.
= Merulius aurantius Lloyd, Mycol. Writ. 7: 1109. 1922.
= Cladoderris rickii Lloyd, Mycol. Writ. 7: 1196. 1923.
= Merulius chilensis Speg., Rev. Chil. Hist. Nat. 28: 26. 1924.
= Merulius dubiosus Bres. ex Rick, Brotéria Ser. Cienc. Nat. 7: 9. 1938.
= Merulius dubiosus var. coriacea Rick, Iheringia Bot. 7: 195. 1960.
Basidiocarps effused to effused-reflexed, rarely dimidiate, often confluent or imbricate; where effused adnate, generally 2 x 4 cm but up to 5 x 10 cm; the margin white to pallid, rarely pinkish-tan, tomentose to cottony; the extreme edge fimbriate, overall up to 2 mm wide; where reflexed the abhymenial surface white to pallid, firm, tomentose or matted-tomentose to hirsute, zonate, up to 5 cm wide and 6 mm thick; hymenium pale yellow, pale orange, fawn, ochraceous to distinctly orange or red-orange, in texture waxy, the folds about 0.3 mm wide and up to 1 mm deep, interrupted to form warty projections or more commonly continuous and anastomosing to form concentrically or randomly arranged, oval pits, two to four per millimetre; context white to pallid, generally about 0.7 mm thick but in reflexed specimens occasionally up to 5 mm thick.
Hyphal system monomitic; context hyphae in two, sometimes indistinct, layers, the abhymenial layer with hyphae randomly woven, hyaline, rather thin- to thick-walled, rigid, simpleseptate or with rare clamp connections, 2-6.5(-8.5) µm in diam, the adjoining layer extending to the subhymenium impregnated with fine granules or a resin-like substance, the hyphae similar but thin-walled, often slightly gelatinized and then rather thin-walled, 2-5.5(-6.5) µm in diam; subhymenial hyphae contorted, often branched, clamps rather common; cystidia lacking; basidia of the chiastobasidium type (Boidin 1958), cylindrical to slenderly clavate, 17-40 x 4-6 µm (Fig. 12); spore wall hyaline, thin, smooth, IKI-, very pale blue in lactic-blue; spores binucleate (Boidin 1958), oblong to ovoid, in profile adaxially often flattened or slightly con-cave, 4-7(-8.5) x 2-3.5 µmi (Figs. 20 and 12).
Habitat: Saprophytic on bark and wood of angiosperms, rarely on gymnosperms, associated with a white rot. 1t is frequently found on branches, up to 3 cm in diam. Widespread throughout the hardwood forests of North America and Europe; also in Chile (Singer 1959, p. 377), Brazil, Ecuador, Venezuela, Morocco (Malençon 1955), N. Mozambique, South Africa, Japan (Ito 1955), China, India (Bakshi and Singh 1958), Siberia (Pilát 1936, and Parmasto 1963 from Kamchatka), Australia, and New Zealand. In Canada and the northern United States, M. corium is collected principally in late summer and fall, but the basidiocarps persist into the winter. A few collections made in the spring were seen, but they appeared to be old, over-wintered basidiocarps.

Critical Specimens Examined
Types: Cladoderris rickii, Brazil, Lloyd Herb. 29345 (BPI). M. aurantiacus, England: Duglestone, V.1831, on Fagus (K). M. aurantius, Tasmania, L. Rodway, LH 19975 (BPI). M. chilensis, Chile: Mulchen, Hect. E. Piochet, 23.II.1923, Herb. No. 24992 (LPS). M. confluens, ut Cantharellus, U.S.A.: Pennsylvania: Bethlehem (PH). M. cubensis, Cuba : Santiago Prov. : Alto Cedro, Earle & Murrill 554, 19-20 Mar. 1905 (NY, isotypes at BPI, FH). M. dubiosus, Brazil: Rio Grande do Sul: Sao Leopoldo, 1932, J. Rick, ex Mo. Bot. Gard. 52286 'BPI-lectotype). M. dubiosus var. coriaceus, Brazil: RGS: Montonegro: Sao Salvador, 18.VI.1942. Fungi Rickiani 14302 (PACA-paratype). M. flavescens, Brazil: RGS, 1903, Rick No. 3 (S-lectotype). M. haedinus, U.S.A.: Alabama: Moulton [Curtis] No. 3812, T. M. Peters 170, autumn 1852 (K-syntype, isotypes at FH, NY). M. hirsutus, Mexico: Jalapa, W. A. & E. L. Murrill 66, 12-20 Dec. 1909 (NY). M. moelleri, Brazil, Dr. A. Moeller (S-lectotype, isotypes at FH (Pat. Herb.), NY, S). M. ochraceus, Ecuador, N. A. Nunez, LH 19970 (BPI). M. pallens, U.S.A.: Pennsylvania: Bethlehem (PH-lectotype, isotype at NY). M. pelliculosus, Australia: Victoria, 1891, Mrs. Martin 762, on Acacia decurrens (K). M. sordidus, Venezuela, coll. Fendler, No. 143 (K, isotypes at FH, NY). M. stereoides, Tanzania: Uluguru Mts.: Nyarra, leg. W. Goetze, Lee u. Kinga Gebrings Exped., 27.XI.1898 (isotypes at BPI, S). M. ulmi, U.S.A.: New York State: Washington Co.: Vaughns, 8.XI.1905, S. H. Burnham (NYS, isotype at BPI). Phlebia blumenavensis, Brazil: St. Cathar, D[r]. A. Moeller 545 (published as No. 345), 1892 (isotype at NY). P. deglubens, Venezuela, Fendler 140 (K, isotype at FH). P. sodiroi, Ecuador: Guayaquil, Aout. [18] 91, Lagerheim (FH).
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