Hemitrichia intorta (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 intorta (Lister) Lister (Fig. 3)

Syntype box B.M. 1483 [ BM001088829 ]: the sample consists of seven pieces of bark in which isolated sporocarps are found and most are broken. Sporocarps sessile or with a short stalk, 1–1.5 mm high, sporotheca spherical to clavate, 0.3–0.7 mm diam., yellow-ochreous in colour. Stalk shorter than diameter of the sporotheca. Peridium thin and membranous, with small papillae on the inside, dehiscence irregular. Capillitium formed by slightly branched yellowish filaments of 4–5 µm diam., free ends absent. Filaments with 2–3 tight spiral bands covered in small and abundant spines (very evident in phase contrast). The spirals are connected by longitudinal striae. Under the SEM the spiral bands show abundant obtuse apex spines or scattered teeth in the spirals; the abundant longitudinal striae are confirmed. Hypothallus dark discoid. Spores are globose to subglobose, 7.8‒9.9(‒10) × (8‒)8.2‒10 µm, av. 9.1 × 8.8 µm, Qav = 1.04 (n = 25), pale to pale yellowish in LM, warty, with marked and tight warts. Under the SEM, the ornamentation is of verrucate type, the verrucae are abundant and of irregular distribution .