Hemitrichia chrysospora (Lister) Lister, 1894

Moreno, G., Castillo, A. & Thüs, H., 2022, Critical revision of Trichiales (Myxomycetes) at the Natural History Museum London (BM), Phytotaxa 567 (1), pp. 1-20 : 2

Hemitrichia chrysospora (Lister) Lister (Fig. 2)

Isolectotype box B.M. 1491 [ BM001089119 ]: sporocarps sessile, globose to subglobose, more rarely short plasmodiocarps, 0.2–0.5 mm wide, yellowish brown in colour. Peridium membranous with granular deposits. Capillitium very abundant, formed by branched and anastomosing filaments, 4–6 µm in diam., with 3–5 spiral bands, with smooth appearance by LM. The spirals are connected by longitudinal striae (stretch marks), the free ends are short and pointed. Under the SEM, smooth spiral bands are observed, but there are also small spines scattered in the spirals, abundant longitudinal striae are confirmed. Spores are globose, 14.7‒18.5 × 14.7‒18.5 µm, av. 16.6 × 16.6 µm, Qav = 1 (n = 25), reticulate, with a regular network of 6–9 meshes to a hemisphere. Under the SEM, the ornamentation is of cristate reticulate type, bands of the reticulum are aproximately 1–1.5 µm high and 0.5 µm wide, with an interior reticulum with numerous little holes. The insides of the meshes are smooth .

Box B.M. 3013 [BM001247517]: The microscopic characters of capillitium and spore ornamentation observed under SEM are similar to those in the isolectotype.