Dothideomycetes » Dothideomycetes, genera incertae sedis


Marquesius L.B. Conc., R.F. Castañeda & Gusmao, in Crous et al., Persoonia 40: 301 (2018).

Index Fungorum number: IF 823622; Facesoffungi number: FoF 12282, 1 morphological species (Species Fungorum 2022), 1 species with molecular data.

Colonies on the natural substrate effuse. Mycelium partly superficial, partly immersed. Sexual morph: Unknown. Asexual morph: Conidiophores macro- and mononematous, erect, simple or branched, straight or slightly curved, cylindrical, sometimes with percurrent extension, septate, smooth or rarely verrucose, brown to pale brown, basal cells lobed or sometimes inflated. Conidiogenous cells mono- or polyblastic, denticulate, integrated. Denticles conspicuous, cylindrical, truncate at apex. Conidial secession schizolytic. Conidia acropleurogenous, holoblastic, simple, in acropetal chains, dry, septate, constricted or not at septa, thick-walled, verrucose, brown to pale brown, sometimes with a conspicuous hilum at base (adapted from Crous et al. 2018).

 Type species: Marquesius aquaticus L.B. Conc., R.F. Castañeda & Gusmao

Notes: Marquesius is characterised by macro- and mononematous, erect, simple conidiophores, mono- or polyblastic, denticulate, integrated conidiogenous cells, schizolytic conidial secession and acropleurogenous, holoblastic, simple conidia. Marquesius morphologically resembles Castanedaea minor but differs in having conspicuous denticles (Partridge et al. 2001; Crous et al. 2018). Marquesius also resembles Cylindrosympodium and Sympodiella in having similar conidiogenous cells but differs in other morphological characters. More collections with DNA sequence data are needed to confirm the generic placement of Marquesius. Molecular data available for Marquesius are

ITS and LSU.


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