Dothideomycetes » Dothideomycetes, genera incertae sedis

Anguillosporella

Citation: Pem D et al. (2019) Mycosphere Notes 275-324: A morphotaxonomic revision and typification of obscure Dothideomycetes genera (incertae sedis). Mycosphere 10(1), 1115–1246

 

Anguillosporella U. Braun, Monogr. Cercosporella, Ramularia Allied Genera (Phytopath. Hyphom.) 1: 233 (1995).

Mycelium internal, composed of hyaline hyphae, septate and branched. Sexual morph: Unknown. Asexual morph: Stromata subcuticular to intraepidermal, often erumpent. Conidiophores hyaline, smooth, arising from stromata, macronematous, single or in fascicles, loose or densely aggregated, simple, continuous or septate, straight, subcylindrical to flexuous. Conidiogenous cells integrated, terminal, monoblastic, determinate, with conidiogenous loci (scars) more or less truncate, unthickened and not darkened, conidial secession schizolytic. Conidia solitary, hyaline, multi-euseptate, scolecosporous, with apex subacute and base usually with a short appendage (adapted from Braun 1995).

 

Type species – Anguillosporella vermiformis (Davis) U. Braun

 

Notes – The genus Anguillosporella was introduced by Davis (1995) with Anguillosporella vermiformis as the type species, found on Alnus (Betulaceae) in North America. Sexual morph of this genus is unknown. Anguillosporella is characterized by flat, dark brown spots or colonies, vermiform conidiophores, holoblastic conidiogenous cells and conglobate brown conidia. Redhead and White (1985) referred A. vermiformis as a phytopathogenic taxon. Wijayawardene et al. (2014) referred Anguillosporella to Dothideomycetes genera incertae sedis. Videira et al. (2017) examined the lectotype of A. vermiformis and morphologically treated the genus in Mycosphaerellaceae but could not resolve the phylogenetic position of the taxa. Currently the genus comprises two species, Anguillosporella coryli (Redhead & G.P. White) U. Braun and Anguillosporella vermiformis (Davis) U. Braun. We re-examined the type specimen of A. vermiformis from S herbarium (F4817) in which the conidiophores are seen as macronematous, vermiform, septate and conidiogenous cells as holoblastic. Therefore, we suggest that this genus should be retained in Dothideomycetes genera incertae sedis. The fungus should be recollected and fresh materials must be re-examined.

 

References

Redhead SA, White GP. 1985 – Mycopappus, a new genus of leaf pathogens and two parasitic Anguillospora species. Canadian Journal of Botany 63, 1429–1435.

Videira SIR, Groenewald JZ, Nakashima C, Braun U et al. 2017 – Mycosphaerellaceae – Chaos or clarity? Studies in Mycology 87, 257–421.

Wijayawardene NN, Crous PW, Kirk PM, Hawksworth DL et al. 2014b – Naming and outline of Dothideomycetes–2014 including proposals for the protection or suppression of generic names. Fungal Diversity 69, 1–5.

 

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