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Issue: Vol. 711 No. 2: 24 Jul. 2025
Type: Article
Published: 2025-07-24
DOI: 10.11646/phytotaxa.711.2.8
Page range: 183-194
Abstract views: 314
PDF downloaded: 15

Phyllactinia passiflorae-adenopodae, and Phyllactinia sennae (Erysiphaceae), two new powdery mildew species found in Mexico

Instituto de Ecología, A.C., Red Biodiversidad y Sistemática, Carretera antigua a Coatepec 351, El Haya, 91073, Xalapa, Veracruz, Mexico
Instituto de Ecología, A.C., Red Biodiversidad y Sistemática, Carretera antigua a Coatepec 351, El Haya, 91073, Xalapa, Veracruz, Mexico
Ascomycota Ovulariopsis Passiflora Senna Fungi

Abstract

Two new powdery mildew species found in Mexico are described and illustrated based on morphological and molecular evidence. Phyllactinia passiflorae-adenopodae on Passiflora adenopoda, is characterized by having typically falciform to asymmetrically ellipsoid-ovoid or ellipsoid-lanceolate conidia. Phyllactinia sennae on Senna didymobotrya is characterized by having lanceolate to ellipsoid-lanceolate primary conidia, combined with clavate secondary conidia, and conidiophores with mainly helicoidal basal cells. Teleomorph was not observed in any of both fungi. Phylogenetic analyzes using nuclear rDNA ITS sequences showed that both powdery mildews form each an independent and strongly supported lineages, which enables their recognition as new species.

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How to Cite

Gregorio-Cipriano, R. & Ramos, A. (2025) Phyllactinia passiflorae-adenopodae, and Phyllactinia sennae (Erysiphaceae), two new powdery mildew species found in Mexico. Phytotaxa 711 (2): 183–194. https://doi.org/10.11646/phytotaxa.711.2.8