Lamproderma kowalskii A. Ronikier, Lado & Mar. Mey.

Ronikier, Anna, 2022, Revision of the Donald T. Kowalski’s collections of Lamproderma (Myxomycetes, Amoebozoa) reveals twice higher species diversity, Phytotaxa 531 (3), pp. 175-210 : 190

Lamproderma kowalskii A. Ronikier, Lado & Mar. Mey. , in Ronikier et al. (2010: 722). Fig. 12

For description see Ronikier et al. (2010).

Material examined:— USA. Tehama Co.: Well’s Cabin Camp ground, 6300 ft., on twigs, 24 June 1967, DTK 6408 (as L. fuscatum, UC 1408233!, holotype); Tehama Co.: 3 miles W of Child’s Meadow, 5200 ft., on dead wood, 20 May 1967, DTK 6169 (as L. fuscatum, UC 1408279!); 3 miles E of Mineral, on decayed wood, DTK 6161 (as L. fuscatum UC 1408235!); 1 mile S of Lassen National Park, on dead twigs, 28 May 1966, DTK 3173 (as L. fuscatum, UC 1408269!); Siskiyou Co.: Mt. Shasta, 7600 ft., on dead twigs, DTK 7453 (as L. fuscatum, UC 1408275!).

Notes:— Lamproderma kowalskii is very similar to L. argenteobrunneum from which it differs in spore ornamentation ( Fig. 12C–F ), and to Meriderma fuscatum (Meyl.) Mar. Mey. & Poulain from which it can be distinguished by persistent peridium ( Fig. 12A ). All three species share similar, rusty brown colours of spores in mass and capillitium. Depreciating peridium characters, Kowalski (1970a) classified all rusty brown specimens as one species Lamproderma fuscatum (see comments to L. argenteobrunneum ). For further comments see Ronikier et al. (2010). Lamprorderma kowalskii is known from North America ( Ronikier et al. 2010, Poulain et al. 2011), and it has recently been reported from Europe ( Erastova et al. 2017).

Figures

FIGURE 12. Lamproderma kowalskii A. Ronikier, Lado & Mar. Mey. A. Sporocarp (note dominating brown colours). B. Columella and capillitium in transmitted light. C. Spores in transmitted light (edge view). D. Spores in transmitted light (top view). E. Spore by SEM. F. Details of spore ornamentation by SEM. Bars: A = 1 mm, B = 500 μm, C–E = 10 μm, F = 3 μm. A, E–F: coll. DTK 6408 (holotypus), B–D: coll. DTK 6161.