Abstract
The phylogenetic relationship of Jattaea and Wegelina, two morphologically related genera of the Calosphaeriales, is analyzed in two molecular analyses using the Internal transcribed spacer region of the DNA operon, and the nuclear large and small subunits of ribosomal DNA combined with the second largest subunit of RNA polymerase for a multigene analysis. For each data set maximum likelihood, maximum parsimony and Bayesian analyses were performed. Type and herbarium material of two lectotype species Jattaea algeriensis and Wegelina discreta were examined and correlated with results from in vitro studies. The phylogenetic analyses show that both species are congeneric. The name Jattaea is accepted to include species with hyaline, allantoid to suballantoid ascospores in clavate, stipitate asci without apical annulus borne on individual cells on ascogenous hyphae and with phialophora-like anamorphs produced in axenic culture. Twelve species are accepted in Jattaea, the concept of the genus is outlined and a key to its species is provided. The genus Wegelina is reduced to its synonymy. Molecular data also show that septation of ascospores, a diagnostic feature used to separate calosphaeria-like fungi into the genus Phragmocalosphaeria, does not appear to be relevant in distinguishing genera in the Calosphaeriales. Therefore, Jattaea includes species with both one-celled and septate ascospores and Phragmocalosphaeria is accepted as its generic synonym. The genus Jattaea and its phialophora-like anamorphs is compared with other genera of the Calosphaeriales and the phylogenetically related Togniniaceae. The revision of four species of Ceratostomella, i.e., C. echinella, C. leptorrhyncha, C. mali and C. microspora, revealed their striking morphological similarities with the Calosphaeriaceae and the Togniniaceae. These are identified as species of Jattaea, Togninia and Togniniella and the respective new combinations are proposed.
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Acknowledgement
This study was financially supported by the Project of the National Foundation of the Czech Republic (GA206/09/0547) and Institutional Research Concept No. AV0Z60050516 (Institute of Botany of the ASCR). Prof. Walter Gams is thanked for careful reading of the manuscript and providing many suggestions. Drs Paul Kirk and Scott Redhead are thanked for help with solving the nomenclatural problem of Wegelina cryptomeriae and supplying the literature. I am grateful for the help of Dr Václav Štěpánek, who undertook the DNA sequencing of ascospore isolates of Jattaea discreta, other members of the Calosphaeriales and provided other sequences newly presented in this study. The curators of herbaria (B, BP, CBS-H, DAOM, NY, NYS, PAD, PC, PDD, PREM, UPS) are acknowledged for loans of the type and other herbarium material and the curators of the CBS culture collection for supplying reference strains.
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Réblová, M. New insights into the systematics and phylogeny of the genus Jattaea and similar fungi of the Calosphaeriales . Fungal Diversity 49, 167–198 (2011). https://doi.org/10.1007/s13225-011-0099-8
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DOI: https://doi.org/10.1007/s13225-011-0099-8