A new genus, Oehlia with Oehlia diaphana comb. nov. and an emended description of Rhizoglomus vesiculiferum comb. nov. in the Glomeromycotina

Błaszkowski, Janusz; Kozłowska, Anna; Niezgoda, Piotr; Goto, Bruno Tomio; Dalpé, Yolande

doi:10.1127/nova_hedwigia/2018/0488

Cited by 29 publications

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“…2), were 22.1-23.6% and 14.4-15.0%, respectively. Thus, the divergences were much or clearly larger than divergences of sequences of the same loci of other phylogenetically characterized neighbors belonging to different genera of the Glomeraceae (Błaszkowski et al 2018a(Błaszkowski et al , 2018b. For example, in the Glomeraceae SSU-ITS-LSU phylogenetic tree (Fig.…”

Section: Discussionmentioning

confidence: 94%

“…Glomeromycota do not have a synapomorphy, i.e., a unique morphological character defining a monophyletic group, or have synapomorphies that are invisible under a compound microscope (Błaszkowski et al 2018a). Therefore, the taxonomic placement of such species within the Glomeromycota is impossible without molecular phylogenetic analyses of sequences of loci with high species resolution.…”

Section: O M O I D S P O R E -P R O D U C I N G S P E C I E S O F T H Ementioning

confidence: 99%

“…1). Excluding the Brazilian fungus and C. claroideum, previous molecular phylogenetic analyses placed the other species in eight genera of the Glomeraceae (Redecker et al 2013;Błaszkowski et al 2018aBłaszkowski et al , 2018b. Except for G. cf.…”

Section: Sequence Alignment and Phylogenetic Analysesmentioning

confidence: 99%

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New sporocarpic taxa in the phylum Glomeromycota: Sclerocarpum amazonicum gen. et sp. nov. in the family Glomeraceae (Glomerales) and Diversispora sporocarpia sp. nov. in the Diversisporaceae (Diversisporales)

et al. 2019

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Of the nearly 300 species of the phylum Glomeromycota comprising arbuscular mycorrhizal fungi (AMF), only 24 were originally described to form glomoid spores in unorganized sporocarps with a peridium and a gleba, in which the spores are distributed randomly. However, the natural (molecular) phylogeny of most of these species remains unknown. We found unorganized sporocarps of two fungi-producing glomoid spores: one in the Amazonian forest in Brazil (tropical forest) and the second in a forest of Poland (temperate forest). The unique spore morphology of the two fungi suggested that they are undescribed species. Subsequent phylogenetic analyses of sequences of the small subunit-internal transcribed spacer-large subunit nrDNA region and the RPB1 gene confirmed this assumption and placed the Brazilian fungus in a separate clade at the rank of genus, very strongly divergent from its sister clade representing the genus Glomus sensu stricto in the family Glomeraceae (order Glomerales). The Polish fungus was accommodated in a sister clade to a clade grouping sequences of Diversispora epigaea, a fungus that also occasionally produces spores in sporocarps, belonging in the Diversisporaceae (Diversisporales). Consequently, the Brazilian fungus was here described as the new genus and new species Sclerocarpum gen. nov. and S. amazonicum sp. nov., respectively. The Polish fungus was described as D. sporocarpia sp. nov. In addition, the supposed reasons for the low representation of sporocarpic species in the Glomeromycota were discussed and the known distribution of sporocarp-producing Glomeromycota was outlined.

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Section: Discussionmentioning

confidence: 94%

Section: O M O I D S P O R E -P R O D U C I N G S P E C I E S O F T H Ementioning

confidence: 99%

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New sporocarpic taxa in the phylum Glomeromycota: Sclerocarpum amazonicum gen. et sp. nov. in the family Glomeraceae (Glomerales) and Diversispora sporocarpia sp. nov. in the Diversisporaceae (Diversisporales)

et al. 2019

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“…of sequences of the 18S-ITS-28S nuc rDNA region or part thereof, which characterized all sequenced species of Dominikia, Kamienskia, and Rhizoglomus, as well as representative species of all other genera of the Glomeraceae sensu Schüßler and Walker (2010), Oehl et al (2011), Błaszkowski et al (2015a, 2018a, Corazon-Guivin et al (2019a,b,c), Jobim et al (2019), and Wijayawardene et al (2020), except for the genus Simiglomus (a total of 15 genera; Figure 1). The alignment contained 139 sequences of 48 species of the Glomeraceae (including our two new species), of which the Rhizoglomus natalense KJ210824 and KJ210826 sequences represented the 28S locus only.…”

Section: Sequence Alignment and Phylogenetic Analysesmentioning

confidence: 99%

“…The disclosure of cryptic species strongly depends on the molecular markers used in phylogenetic identification. Currently, of the many markers that have been used in phylogenetic studies of the Glomeromycota (Błaszkowski et al, 2018a(Błaszkowski et al, ,b, 2019aJobim et al, 2019;Magurno et al, 2019), those comprising the partial small subunit (18S), internal transcribed spacer (ITS1-5.8S-ITS2 = ITS), and partial large subunit (28S) nuc rDNA segment (= 18S-ITS-28S), as well as the largest subunit of RNA polymerase II (rpb1) gene, have the highest resolution power and characterize the highest proportion of described species within the Glomeromycota (Krüger et al, 2012;Stockinger et al, 2014;Al-Yahya'ei et al, 2017). The first marker allowed to separate, for example, Rhizoglomus dunense from Rhizoglomus clarum, whose morphologies are almost identical, but sequence divergence is very high (13.3%;Al-Yahya'ei et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

New Glomeromycotan Taxa, Dominikia glomerocarpica sp. nov. and Epigeocarpum crypticum gen. nov. et sp. nov. From Brazil, and Silvaspora gen. nov. From New Caledonia

et al. 2021

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Examination of fungal specimens collected in the Atlantic rain forest ecosystems of Northeast Brazil revealed many potentially new epigeous and semihypogeous glomerocarp-producing species of the phylum Glomeromycota. Among them were two fungi that formed unorganized epigeous glomerocarps with glomoid spores of almost identical morphology. The sole structure that distinguished the two fungi was the laminate layer 2 of their three-layered spore wall, which in spores of the second fungus crushed in PVLG-based mountants contracted and, consequently, transferred into a crown-like structure. Surprisingly, phylogenetic analyses of sequences of the 18S-ITS-28S nuc rDNA and the rpb1 gene indicated that these glomerocarps represent two strongly divergent undescribed species in the family Glomeraceae. The analyses placed the first in the genus Dominikia, and the second in a sister clade to the monospecific generic clade Kamienskia with Kamienskia bistrata. The first species was described here as Dominikia glomerocarpica sp. nov. Because D. glomerocarpica is the first glomerocarp-forming species in Dominikia, the generic description of this genus was emended. The very large phylogenetic distance and the fundamental morphological differences between the second species and K. bistrata suggested us to introduce a new genus, here named as Epigeocarpum gen. nov., and name the new species Epigeocarpum crypticum sp. nov. In addition, our analyses also focused on an arbuscular mycorrhizal fungus originally described as Rhizophagus neocaledonicus, later transferred to the genus Rhizoglomus. The analyses indicated that this species does not belong to any of these two genera but represents a new clade at the rank of genus in the Glomeraceae, here described as Silvaspora gen. nov.

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Overview of the Mycorrhizal Fungi in South America

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Fungal Biology

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A new genus, Oehlia with Oehlia diaphana comb. nov. and an emended description of Rhizoglomus vesiculiferum comb. nov. in the Glomeromycotina

Cited by 29 publications

References 0 publications

New sporocarpic taxa in the phylum Glomeromycota: Sclerocarpum amazonicum gen. et sp. nov. in the family Glomeraceae (Glomerales) and Diversispora sporocarpia sp. nov. in the Diversisporaceae (Diversisporales)

New sporocarpic taxa in the phylum Glomeromycota: Sclerocarpum amazonicum gen. et sp. nov. in the family Glomeraceae (Glomerales) and Diversispora sporocarpia sp. nov. in the Diversisporaceae (Diversisporales)

New Glomeromycotan Taxa, Dominikia glomerocarpica sp. nov. and Epigeocarpum crypticum gen. nov. et sp. nov. From Brazil, and Silvaspora gen. nov. From New Caledonia

Overview of the Mycorrhizal Fungi in South America

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