TY - JOUR
T1 - Delimitation, new species and teleomorph-anamorph relationships in Codinaea, Dendrophoma, Paragaeumannomyces and Striatosphaeria (Chaetosphaeriaceae)
AU - Reblova, Martina
AU - Nekvindova, Jana
AU - Fournier, Jacques
AU - Miller, Andrew N.
N1 - Funding Information:
This study was supported by the project of the Czech Science Foundation (GAČR 20-14840S), and as long-term research development projects of the Czech Academy of Sciences, Institute of Botany (RVO 67985939) (M.R.) and the University Hospital Hradec Králové MH CZ – DRO (UHHK, 00179906) (J.N.). This study was also supported by a National Science Foundation award (DEB-0515558) to A.N.M. The WM Keck Center at the University of Illinois Urbana-Champaign is thanked for sequencing services. The field work of M.R. in New Zealand was partly supported by Studienstiftung für mykologische Systematik und Ökologie (2003) and Manaaki Whenua Fellowship, Landcare Research Auckland (2005).The authors have declared that no competing interests exist.
PY - 2020/10
Y1 - 2020/10
N2 - The Chaetosphaeriaceae are a diverse group of pigmented, predominantly phialidic hyphomycetes comprised of several holomorphic genera including Chaetosphaeria, the most prominent genus of the family. Although the morphology of the teleomorphs of the majority of Chaetosphaeria is rather uniform, their associated anamorphs primarily exhibit the variability and evolutionary change observed in the genus. An exception from the morphological monotony among Chaetosphaeria species is a group characterised by scolecosporous, hyaline to light pink, multiseptate, asymmetrical ascospores and a unique threelayered ascomatal wall. Paragaeumannomyces sphaerocellularis, the type species of the genus, exhibits these morphological traits and is compared with similar Chaetosphaeria with craspedodidymum- and chloridium-like synanamorphs. Morphological comparison and phylogenetic analyses of the combined ITS-28S sequences of 35 isolates and vouchers with these characteristics revealed a strongly-supported, morphologically well-delimited clade in the Chaetosphaeriaceae containing 16 species. The generic name Paragaeumannomyces is applied to this monophyletic clade; eight new combinations and five new species, i.e. P. abietinus sp. nov., P. elegans sp. nov., P. granulatus sp. nov., P. sabinianus sp. nov. and P. smokiensis sp. nov., are proposed. A key to Paragaeumannomyces is provided. Using morphology, cultivation studies and phylogenetic analyses of ITS and 28S rDNA, two additional new species from freshwater and terrestrial habitats, Codinaea paniculata sp. nov. and Striatosphaeria castanea sp. nov., are described in the family. A codinaea-like anamorph of S. castanea forms conidia with setulae at each end in axenic culture; this feature expands the known morphology of Striatosphaeria. A chaetosphaeria-like teleomorph is experimentally linked to Dendrophoma cytisporoides, a sporodochial hyphomycete and type species of Dendrophoma, for the first time.
AB - The Chaetosphaeriaceae are a diverse group of pigmented, predominantly phialidic hyphomycetes comprised of several holomorphic genera including Chaetosphaeria, the most prominent genus of the family. Although the morphology of the teleomorphs of the majority of Chaetosphaeria is rather uniform, their associated anamorphs primarily exhibit the variability and evolutionary change observed in the genus. An exception from the morphological monotony among Chaetosphaeria species is a group characterised by scolecosporous, hyaline to light pink, multiseptate, asymmetrical ascospores and a unique threelayered ascomatal wall. Paragaeumannomyces sphaerocellularis, the type species of the genus, exhibits these morphological traits and is compared with similar Chaetosphaeria with craspedodidymum- and chloridium-like synanamorphs. Morphological comparison and phylogenetic analyses of the combined ITS-28S sequences of 35 isolates and vouchers with these characteristics revealed a strongly-supported, morphologically well-delimited clade in the Chaetosphaeriaceae containing 16 species. The generic name Paragaeumannomyces is applied to this monophyletic clade; eight new combinations and five new species, i.e. P. abietinus sp. nov., P. elegans sp. nov., P. granulatus sp. nov., P. sabinianus sp. nov. and P. smokiensis sp. nov., are proposed. A key to Paragaeumannomyces is provided. Using morphology, cultivation studies and phylogenetic analyses of ITS and 28S rDNA, two additional new species from freshwater and terrestrial habitats, Codinaea paniculata sp. nov. and Striatosphaeria castanea sp. nov., are described in the family. A codinaea-like anamorph of S. castanea forms conidia with setulae at each end in axenic culture; this feature expands the known morphology of Striatosphaeria. A chaetosphaeria-like teleomorph is experimentally linked to Dendrophoma cytisporoides, a sporodochial hyphomycete and type species of Dendrophoma, for the first time.
KW - 15 new taxa
KW - Molecular phylogeny
KW - Phialidic conidiogenesis
KW - Scolecosporous
KW - Systematics
KW - Wood-inhabiting fungi
UR - http://www.scopus.com/inward/record.url?scp=85096045275&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85096045275&partnerID=8YFLogxK
U2 - 10.3897/MYCOKEYS.74.57824
DO - 10.3897/MYCOKEYS.74.57824
M3 - Article
C2 - 33149721
AN - SCOPUS:85096045275
VL - 74
SP - 17
EP - 74
JO - MycoKeys
JF - MycoKeys
SN - 1314-4057
IS - 74
ER -