Critical revision of Trichiales (Myxomycetes) at the Natural History Museum London (BM) Author Moreno, G. 0000-0002-9303-7181 Departamento de Ciencias de la Vida (Botánica), Facultad de Ciencias, Universidad de Alcalá, 28805 Alcalá de Henares, Madrid, Spain. & gabriel. moreno @ uah. es; https: // orcid. org / 0000 - 0002 - 9303 - 7181 gabriel.moreno@uah.es Author Castillo, A. 0000-0001-6308-5556 Departamento de Ciencias de la Vida (Botánica), Facultad de Ciencias, Universidad de Alcalá, 28805 Alcalá de Henares, Madrid, Spain. & aurelio. castillo @ uah. es; https: // orcid. org / 0000 - 0001 - 6308 - 5556 aurelio.castillo@uah.es Author Thüs, H. 0000-0002-8697-4572 Current Address: State Museum of Natural History Stuttgart, Germany. & The Natural History Museum, London, United Kingdom. & holger. thues @ smns-bw. de; https: // orcid. org / 0000 - 0002 - 8697 - 4572 holger.thues@smns-bw.de text Phytotaxa 2022 2022-09-30 567 1 1 20 http://dx.doi.org/10.11646/phytotaxa.567.1.1 journal article 156928 10.11646/phytotaxa.567.1.1 6c552cda-d3de-41c2-8fbc-fb52d98d138d 1179-3163 7137881 Hemitrichia intorta (Lister) Lister (1894: 176) . ≡ Hemiarcyria intorta Lister (1891: 268) . ≡ Hyporhamma intortum (Lister) Lado (2001: 47) . Syntype :— UNITED KINGDOM . England : Hertfordshire , Hitchin , 51.947ºN 0.283ºW , 25 March 1889 , M.E. Seibohm , B.M. 1483, [ BM001088829 = box] ( BM !) . This species is characterized by its sessile or short-stalk sporocarps, small spores 7.8‒9.9(‒10) × (8‒)8.2‒10 µm in diam., and capillitium filaments ornamented with spiral bands with abundant spines. Our observations confirm the data assembled by Rammeloo (1984) based on the same collection.