Satchmopsis B. Sutton & Hodges, in Sutton, Nova Hedwigia 26(1): 1 (1975)
Facesoffungi number: FoF 07582
Leotiomycetes, Leotiomycetidae, Leotiales, Cochlearomycetaceae
Saprobic on the host plant in terrestrial habitat. Sexual morph: undetermined. Asexual morph: Conidiomata dark brown to brown, stromatic, superficial, subepidermal, sessile, infundibuliform to cupulate or cylindrical, unilocular. Ostiole absent, dehiscence by irregular splits of the apical wall. Conidiomatal wall composed of thick-walled, dark brown to hyaline cells of textura angularis in the basal part, becoming vertically elongated, adpressed, parallel, dark brown hyphae of textura porrecta in the lateral part. Conidiophores arising from the upper cells of the basal stroma, hyaline, cylindrical, branched towards base, septate, smooth-walled. Conidiogenous cells hyaline, enteroblastic, phialidic, cylindrical to long lageniform, integrated or discrete, determinate, smooth-walled, with minute collarettes. Conidia hyaline, cylindrical or acerose, unicellular, smooth-walled (adapted from Nag Raj 1977).
Type species: Satchmopsis brasiliensis B. Sutton & Hodges, in Sutton, Nova Hedwigia 26(1): 3 (1975)
Notes: The genus was introduced by Sutton (1975) to accommodate a single species S. brasiliensis collected on dead leaves of Eucalyptus sp. in Brazil. The genus is characterized by sessile conidiomata with a one-cell thick periclinal wall composed of vertically elongated, almost parallel pseudoparenchyma, phialidic conidiogenous cells and hyaline, cylindrical, unicellular conidia (Nag Raj 1977, Saikawa et al. 1991). Sutton and Pascoe (1987) included S. australiensis B. Sutton & Pascoe with an extensive geographical distribution in North, Central and South America, Asia, and Australasia. Castañeda (1987) added a third species, S. sacciformis R.F. Castañeda, which is distinguished by its falcate, 1-septate conidia with basal appendage, and a periclinal wall that is pale brown in the lower part, and dark brown in the apical part. However, S sacciformis was later designated as the type species of Zelosatchmopsis by Saikawa et al. (1991), based on its distinct conidial morphology. Another taxon, S. cubensis R.F. Castañeda & W.B. Kendr. was described from a dead leaf of Citharexylum fruticosum (Verbenaceae) in Cuba (Castañeda and Kendrick in (1991). Crous et al. (2006b) showed that S. brasiliensis was close to several families (Dermateaceae (ITS), Tympanidaceae, Pseudeurotiaceae, and Vibrisseaceae (LSU) and Phacidiaceae (SSU) in Helotiales, but its definite placement cannot be confirmed. Ekanayaka et al. (2019) revised Leotiomycetes and placed Satchmopsis in Cochlearomycetaceae (Leotiales). The taxonomy of Satchmopsis warrants further investigations based on fresh collections and phylogenetic inferences with multi-loci.
Distribution: USA, Australasia, Brazil, Colombia, Cuba, Indonesia (Sutton 1975, Sutton and Pascoe 1987, Crous et al. 2006b).
Satchmopsis brasiliensis (redrawn from Nag Raj 1977) a Conidia. b Enlarged view of lateral wall. c Conidiophores, conidiogenous cells and developing conidia.
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