Gymnoderma Nyl.

Pino-Bodas, Raquel, Ahti, Teuvo & Stenroos, Soili, 2020, Taxonomic notes on Pycnothelia Dufour and Gymnoderma Nyl. (Cladoniaceae) in Madagascan Region, Cryptogamie, Mycologie 20 (5), pp. 109-118 : 114

Gymnoderma Nyl.

( Fig. 2E, F )

Flora 43: 546 (1860), nom. cons. — Type species: Gymnoderma coccocarpum Nyl.

Baeoderma Vain., Acta Societatis pro Fauna et Flora Fennica 53 (1): 3 (1922). — Type species: Baeoderma madagascareum (Nyl.) Vain. — Basionym: Heterodea madagascarea Nyl., Lichenes Novae Zelandiae (1888) .

LECTOTYPE. — Designated by Jahns (1969): Madagascar, Rev. R. Baron s.n. (H-NYL 37528).

NEW SPECIMENS OF G. COCCOCARPUM EXAMINED. — Vietnam, prov. Lam Dong: Bi Doup Massif, E of Giang Ly, on bark of Pinus dalatensis and other trees, 2012 A. N. Demidova 334, 335 346, 358 (H), 389 (H, MACB). Mauritius, Savanne, Mt. Cocotte, SE of peak, on road to Bassin Blanc, 620 m, 1991 H. Krog & E. Timdal MAU29 (O). Réunion, NW of Plaine-des-Palmistes, NW side of Forêt de Bébour, 3.5 km on trail Gîte de Bélouve to Caverne Mussard, 1980 m, 2008 P. v.d. Boom 40494, B. v.d. Boom, D. Brand, M. Brand & E. Sérusiaux (H).

NOTES

Confused with Sphaerophorus madagascareus Nyl. , now recognized as Bunodophoron madagascareum (Nyl.) Wedin

( Wedin 1993), in Zahlbruckner’s (1922) Catalogus. The latter error was noticed by Lamb (1963), but he suggested that Baeoderma belongs to Baeomyces . Jahns (1970) and Jahns & van der Knapp (1973) already included Heterodea madagascarea in Gymnoderma coccocarpum , but we hesitated ( Zhou et al. 2006: 878) to synonymize them. After seeing the material collected by H. Krog and E. Timdal in Mauritius (see below) we are ready to accept the synonymy ( Fig. 2 ). Unfortunately, we could not confirm it also with DNA data.

Gymnoderma coccocarpum has a squamulose thallus with green-yellowish upper surface and white lower surface, margin crenate. Podetia absent or very short and solid, born marginally, apothecia common, pale brown, sessile, globose. For more details see the description on Sato (1940) and Wei & Ahti (2002).

Figures

FIG. 2. — A, Pycnothelia mascarena (Nyl.) Nyl., Réunion, Lepervanche-Méziéres 116 (PC-Thuret); B, Pycnothelia caliginosa D.J.Galloway & P.James, New Zealand, Galloway s.n. (isotype, H). Photo: Sanna Laine; C, Pycnothelia papillaria Dufour, Canada, New Brunswick, Ahti 74425 & Clayden (H). Photo: Sanna Laine; D; Pycnothelia papillaria, Canada, Ontario, Burgaz s.n. (MACB); E, Gymnoderma coccocarpum Nyl., Taiwan, Stenroos 3462 (H); F, Gymnoderma coccocarpum (Synonym of Heterodea madagascarea), Réunion, v.d. Boom 40494 (H). Scale bars: 1 cm.