Periconia variicolorsp. nov., a new species from Puerto Rico

Abstract

Periconia variicolor was isolated from water of an evaporation pond used for salt production on the southwestern coast of Puerto Rico. On the basis of cultural and morphological characteristics and ITS sequence it is describe as a new species of Periconia.

Fungal Planet description sheets: 785– 867

“…Given the morphological and cultural differences and also the low clustering quality values produced by both genetic markers at the generic level, we consider P. caespitosa as a new species. In addition, P. caespitosa is morphologically different from all currently accepted Periconia species (Subramanian 1955, Rao & Rao 1964, Ellis 1971, 1976, Cantrell et al 2007, Markovskaja & Kačergius 2014, Tanaka et al 2015, Wu et al 2015, Liu et al 2017, Coronado-Ruiz et al 2018, Crous et al 2018b, Vu et al 2019). Among all the species of Periconia with clustered conidiophores the most similar to P. caespitosa are P. clitoriae , P. tirupatiensis , P. saraswatipurensis and P. atropurpurea , but these can be differentiated from P. caespitosa by the combination of features such as the aggrupation of conidiophores and the position of conidiogenous cells in them, conidial size and ornamentation, and pigment production on natural substrates and/or in culture.…”

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

“…The sexual morph is characterized by scattered or grouped, globose ascomata with a central ostiole, hyaline periphyses, 8-spored asci, and broadly fusiform, 1-septate, hyaline and smooth ascospores with an entire sheath [ 7 , 8 , 9 , 10 ]. Periconia species are widely distributed and usually found in terrestrial habitats and rarely in aquatic habitats [ 11 , 12 ]. The genus comprises many saprophytes and endophytes, while few are plant pathogens, mainly causing diseases in graminaceous plants [ 2 , 4 , 13 , 14 , 15 ].…”

Three New Periconia Species Isolated from Wurfbainia villosa in Guangdong, China: A Discussion on the Doubtful Taxa Clustering in this Genus

“…The phylogenetic relationships among Periconia species were analyzed based on the combined ITS, LSU, SSU, and tef1-α sequence data, which supported the recognition of P. endophytica, P. yangjiangensis, and P. wurfbainiae as new species (Figure 1). Morphologically, P. endophytica resembles P. cambrensis in having conidia that are produced on conidiogenous cells and branches along the sides of the conidiophores [45]. However, the conidiophores of P. endophytica are shorter (15-110 µm) compared to those of P. cambrensis (up to 300 µm), while its conidia have a smaller diameter (4-6 µm) than those of P. cambrensis (5-8 µm) [47].…”

“…Periconia wurfbainiae differs from its phylogenetically related species P. variicolor by having longer conidiophores (225-315 × 8-14 µm vs. 20-271 × 3-8 µm) and smaller conidia (3.5-7 µm vs. 7.5-9.5 µm). The presence of conidiophores with a stipe and swollen apex is absent in P. wurfbainiae, whereas they are observed in P. variicolor [45]. Moreover, the conidiophores of P. wurfbainiae are macronematous, dark brown to black, and smooth to slightly rough-walled.…”