A three-gene phylogeny supports taxonomic rearrangements in the family Didymiaceae (Myxomycetes)

Additions to Trichia botrytis complex (Myxomycetes): 9 new species

“…The specimens we attribute to Trichia munda were obtained in moist chambers on leaf litter of Quercus robur;theyhadelaters 3.1-5.1 µm wide with medium tips (21-48 µm) and spores ave raging 9.2-10.6 µm diam., which more or less agrees with de scriptions of Lister and Meylan (Lister 1897, Meylan 1927. At the same time, they had rather large sporangia (sometimes up to 1.8 mm high) and long stalks (52--72 % of the total height), as it is stated in other works (Ing 1999, Poulain et al 2011, Johannesen & Vetlesen 2020. It is important to note that studied specimens had one obvious difference from the ori ginal description: spiral bands decorating elaters can hard ly be described as neat and evenly spaced, which may be a result of aberrant development.…”

“…In the ana lytic table (key), he also noted that T. munda has elater tips 20-40 µm long and spores 9-12 µm and inhabits dead bark and rotten wood (Meylan 1927). Although long stalks great ly exceeding the diameter of sporotheca had not been men tioned in any way in the original description, this trait was noted by several authors (e.g., Ing 1999) and even suggested as a diag nostic feature of T. munda (Poulain et al 2011).…”

“…It is also recommended to look not at the ends, but at the middle part of the elater, where thickness and distribution of spirals are most even. See the expla nation in Poulain & Meyer (2007) or Poulain et al (2011) as well as in supplementary materials (Fig. S5).…”

“…In the majority of publications, the inner peridium in the Trichia botrytis complex is characterized only as a translu cent membranous layer visible between peridium plates (Martin & Alexopoulos 1969, Ing 1999, Poulain et al 2011. We are aware of only one detailed study of the in ner peri diuminthewholefamilyTrichiaceaeusingSEM;itwas conducted by Rammeloo (1974a), who included T. botrytis and T. erecta among other species.…”

“…The genus Trichia was described in 1768, and 30 species are currently recognized within it (Haller 1768, Lado 2005-2023. Sporocarps with one or two closely adhering pe ridium layers, predominantly yellow spore mass, simple or very scantily branched elaters ornamented with left-(rarely right-) handed spiral thickenings are considered to be diagnostic features of the genus.…”