<p><strong><em>Periconia citlaltepetlensis sp. nov</em></strong><strong>. (Periconiaceae, Pleosporales): a psychrotolerant fungus from high elevation volcanic glacier (Mexico)</strong></p>

Abstract

Periconia citlaltepetlensis sp. nov. is the first record of a fungus identified to species level from high elevation volcanic glacier in Mexico. It is a novel dothideomycete species supported by morphological, cultural characters and phylogenetic analysis (nucleotide sequences data rDNA analysis). The new species is characterized by conidiophores often with 2–4 enteroblastic, percurrent proliferations, large, globose, golden brown or reddish brown conidia that are borne singly or in basipetal chains, verrucose to irregular lobate crests, born singly or in basipetal chains of two conidia; acropetally proliferating; conidiogenesis holoblastic. The morphology of P. citlaltepetlensis is compared to other Periconia species and a detailed description and morphological illustrations are provided.

Taxonomic Reappraisal of Periconiaceae with the Description of Three New Periconia Species from China

“…The conspecific status of these ambiguous species should be re-evaluated. Moreover, phylogenetic relationships of P. byssoides , P. celtidis , P. pseudobyssoides and P. salina are not well-resolved in this study and it is in agreement with previous studies [ 18 , 51 , 72 ]. We re-evaluated the conspecific status of P. byssoides , P. celtidis , P. pseudobyssoides and P. salina based on the pairwise homoplasy index (PHI) test.…”

“…Tanaka et al [ 12 ] judged Periconia to be a member of Dothideomycetes due to the morphological resemblance of Periconia sensu stricto (e.g., P. byssoides , P. cookei , P. igniaria , and P. digitata ) with P. lichenoides . The taxonomic treatment proposed by Tanaka et al [ 12 ] was followed by various subsequent authors [ 2 , 6 , 17 , 18 , 19 , 20 , 21 , 22 , 43 , 51 , 52 , 72 ]. However, this taxonomic status is somewhat questionable due to the lack of information from the type species of Periconia .…”

“…The generated consensus sequences were obtained via BioEdit v. 7.0.9.0 [ 49 ] and subjected to a basic local alignment search tool (nucleotide BLAST; ; accessed on 11 June 2021) for delineating closely related taxa. Based on the nucleotide BLAST search, new isolates belong to the genus Periconia , and a corresponding sequence dataset of newly generated taxa and other closely related taxa in Periconiaceae ( Table 1 ) was generated for further phylogenetic analyses based on recent publications [ 6 , 43 , 50 , 51 , 52 ].…”

“…Conidiogenous cells mono-to polyblastic, solitary, discrete or integrated, determinate, or inconspicuous, lateral and terminal, pigmented, ellipsoidal, ovoid to clavate, aseptate, sometimes with small, pimple-like pores, or with percurrent proliferations. Conidia dimorphic; primary conidia globose to subglobose, or fusoid-ellipsoidal, subhyaline to brown or dark brown, smooth to verruculose, solitary or in short, branched chains, sometimes with minute, unthickened basal pores; secondary conidia phragmoconidia, brown, verruculose, arising from disarticulating hyphal cells (adopted from Crous et al [16], Calvillo-Medina et al [51]). Type species: Periconia lichenoides Tode.…”

Six Additions to the Genus Periconia (Dothideomycetes: Periconiaceae) from Graminaceous Plants in China

“…Most Periconia species are mainly known from their asexual morphs, characterized by conidiophores that are macronematous, mononematous, branched or unbranched, and pale to dark brown [ 2 , 3 ], while conidiogenous cells are discrete on the terminal or intercalary of the stipe and are monoblastic to polyblastic [ 2 , 4 ]. Conidia of Periconia species are globose to ellipsoidal, catenate or solitary, smooth or verruculose, and pale brown to brown [ 2 , 4 , 5 , 6 ]. Only five species have been reported to have sexual morphs, viz., P. didymosporum , P. homothallica , P. igniaria , P. prolifica, and P. pseudodigitata [ 7 , 8 ].…”