Fungalpedia – Note 440, Xenopenidiella

 

Xenopenidiella Quaedvl. & Crous 

Citation when using this data: Tibpromma et al. 2024 (in prep.) – Fungalpedia, Ascomata.

Index Fungorum, Facesoffungi; MycoBank, GenBank, Fig. 1 

Classification: Teratosphaeriaceae, Mycosphaerellales, Dothideomycetidae, Dothideomycetes, Pezizomycotina, Ascomycota, Fungi.

Based on phylogenies of ITS, LSU, RPB2, TEF-1α and Btub sequences, Quaedvlieg et al. (2014) introduced Xenopenidiella within Teratosphaeriaceae, Mycosphaerellales in Dothideomycetes with type species Xenopenidiella rigidophora. The type species of this genus was initially described as Penidiella rigidophora by Crous et al. (2007). Morphologically, Xenopenidiella is superficially similar to Penidiella, but distinct in that conidiogenous cells often appear subdenticulate, while conidiophores are dimorphic, not truly penicillate (rather loosely branched at the apex) (Quaedvlieg et al. 2014). Xenopenidiella is characterized by strongly branched mycelium consisting of presented dimorphic conidiophores; macronematous conidiophores, separate, erect, subcylindrical, terminally loosely branched; lacking rhizoids, septate, medium to dark brown; micronematous conidiophores erect, subcylindrical, septate, pale to medium brown (concolorous with hyphae); conidiogenous cells are predominantly terminal, rarely intercalary, medium brown, smooth, subcylindrical; conidia in branched chains, medium brown, verruculose, ellipsoid to cylindrical-oblong (Quaedvlieg et al. 2014). Later, six new species of Xenopenidiella were reported from the integument of leaf-cutting ants from Brazil viz: Xenopenidiella clavata, X. formica, X. inflata, X. laevigata, X. nigrescens, and X. tarda (Duarte et al. 2017). The members of Xenopenidiella can be found as saprobic on leaf litter or isolated from the integument of leaf-cutting ants (Quaedvlieg et al. 2014, Duarte et al. 2017).

Type species: Xenopenidiella rigidophora (Crous, R.F. Castañeda & U. Braun) Quaedvl. & Crous

Other accepted species: Species Fungorum – search Xenopenidiella

 

Figure 1 – Penidiella rigidophora (CBS H-19938, holotype). a Hyphae. b Conidiophores. c Secondary conidia d Ramoconidia. Scale bar = 10 µm. Redrawn from Crous et al. (2007).

 

References

Crous PW, Braun U, Groenewald JZ. 2007 – Mycosphaerella is polyphyletic. Studies in Mycology 58(1), 1–32. 

Duarte AP, Attili-Angelis D, Baron NC, Groenewald JZ, Crous PW, Pagnocca FC. 2017 – Riding with the ants. Persoonia-Molecular Phylogeny and Evolution of Fungi 38(1), 81 –99.

Quaedvlieg W, Binder M, Groenewald JZ, Summerell BA et al. 2014 – Introducing the Consolidated Species Concept to resolve species in the Teratosphaeriaceae. Persoonia-Molecular Phylogeny and Evolution of Fungi 33(1), 1–40. 

 

Entry by

Zhang GQ, Center for Yunnan Plateau Biological Resources Protection and Utilization, College of Biological Resource and Food Engineering, Qujing Normal University, Qujing, Yunnan 655011, P.R. China.

 

(Edited by Saowaluck Tibpromma, Samaneh Chaharmiri-Dokhaharani, & Achala R. Rathnayaka)

 

Published online 2 December 2024

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