Two novel species of Marasmius (Marasmiaceae, Agaricales) from lower northern Thailand

Phytotaxa ◽  
2019 ◽  
Vol 403 (2) ◽  
pp. 111
Author(s):  
NOPPARAT WANNATHES ◽  
NAKARIN SUWANNARACH ◽  
JATURONG KUMLA ◽  
SAISAMORN LUMYONG

Two new species of Marasmius secton Sicci are described based on field work conducted in Phu Hin Rong Kla National Park, Thailand. Marasmius thailandicus is characterized by small, thin yellowish white basidiomes, ellipsoid basidiospores and dimorphic caulocystidia. Marasmius rongklaensis is distinguished by a conical, velutinous pileus, ellipsoid basidiospores, dimorphic cheilocytidia and pileipellis a hymeniderm with pileosetae. Comprehensive description along with illustrations, photographs, and a comparison with phenetically similar taxa are provided. The taxonomic position has been confirmed by phylogenetic analyses of the internal transcribed spacer (ITS1-5.8S-ITS2) sequences of the ribosomal DNA.

Phytotaxa ◽  
2018 ◽  
Vol 362 (2) ◽  
pp. 211
Author(s):  
NOPPARAT WANNATHES ◽  
RATTIKAN KAEWKETSRI ◽  
NAKARIN SUWANNARACH ◽  
JATURONG KUMLA ◽  
SAISAMORN LUMYONG

Coral fungi in Phu Hin Rong Kla National Park, Thailand, were surveyed from June to September of 2011 and 2012. A novel species, Phaeoclavulina pseudozippelii is described together with illustrations, photographs, and a comparison with phenetically similar taxa. Its taxonomic position was confirmed through phylogenetic analyses of the large subunit and internal transcribed spacer (ITS1-5.8S-ITS2) ribosomal DNA sequences.


Phytotaxa ◽  
2019 ◽  
Vol 427 (3) ◽  
pp. 186-199
Author(s):  
ARCHANA SINGH ◽  
NIKHIL KUMAR SINGH ◽  
PARAS NATH SINGH ◽  
RAGHVENDRA SINGH ◽  
NAWAL KISHORE DUBEY

Ochroconis helicteris, a novel species of the oligotrophic genus Ochroconis (Sympoventuriaceae, Venturiales), has been described and illustrated. Morphologically, this species has characters similar to allied species in the genus Ochroconis, but differs in conidial dimensions and shape. Phylogenetic analyses using nuclear ribosomal DNA gene ITS and protein coding gene BT2 revealed it clustering as monophyletic clade which was separated from known Ochroconis species. New species was isolated from leaf surface of medicinal plant Helicteris isora L.


Botany ◽  
2015 ◽  
Vol 93 (7) ◽  
pp. 389-396 ◽  
Author(s):  
Janusz Błaszkowski ◽  
Gerard Chwat ◽  
Sarah Symanczik ◽  
Anna Góralska

Two new species of arbuscular mycorrhizal fungi (AMF) of the recently erected genus Dominikia (Glomeromycota) are described based on their morphology and phylogenetic analyses of SSU–ITS–LSU sequences. The distinctive morphological characters of the first species, Dominikia duoreactiva sp. nov., is the formation of loose clusters with yellow-coloured, 30–70 μm diameter spores having a three-layered spore wall, of which layers 1 and 3 stain in Melzer’s reagent. The second species, Dominikia difficilevidera sp. nov., is distinguished by its hyaline, 31–45 μm diameter spores, which arise mainly singly and have a three-layered spore wall, of which layer 1 is thicker than the structural laminate layer 2, and layer 3 is flexible to semi-flexible. Both species were originally associated with maritime dune plants; D. duoreactiva comes from the Giftun Island, Egypt, Africa, and D. difficilevidera from the Słowiński National Park, Poland. Based on available data, we suggest D. duoreactiva occurs rarely in the world, and D. difficilevidera has a worldwide distribution, but it either occurs infrequently or has been overlooked or lost during spore extraction from soils of many sites because of its extremely small and hyaline spores. A method allowing the extraction of even the smallest spores of AMF, but observable under a dissecting microscope, is described.


Phytotaxa ◽  
2021 ◽  
Vol 525 (2) ◽  
pp. 109-123
Author(s):  
BIN CHEN ◽  
JIE SONG ◽  
JIN-HUA ZHANG ◽  
JUN-FENG LIANG

Two new species of Russula are described and illustrated in this paper. Russula clavulus is recognised by a pale yellow pileus centre, white margin with tuberculate striation, white to pale lamellae with small pale yellow spots, white to light yellow spore print, subglobose to broadly ellipsoid spores with short or long ridges and hymenial cystidia on lamellae sides that are mainly subclavate or fusiform. Russula multilamellula is morphologically characterised by the brownish orange to hazel pileus centre and satin white to yellowish-white margin with brownish tinge, lamellulae that are usually irregular in length and often anastomosing with lamellae, subglobose to broadly ellipsoid spores with short or long ridges and clavate hymenial cystidia. The combination of morphological features and multigene phylogenetic analyses of ITS-nrLSU-RPB2-mtSSU data indicated that these two new taxa belong to Russula subg. Heterophyllidia sect. Ingratae.


Phytotaxa ◽  
2018 ◽  
Vol 374 (2) ◽  
pp. 129
Author(s):  
YU-YAN XU ◽  
LI-JIE GUO ◽  
TING LI ◽  
LI FAN

Two new truffle species Barssia guozigouensis and B. luyashanensis are described and illustrated from North China based on morphological and molecular evidences. Morphologically, B. guozigouensis is diagnosed by its distinctly warty ascomata and solid gleba with small and irregular chambers, and B. luyashanensis is by its red brown ascomata with fine warts and gleba without chambers. Molecular phylogenetic analyses based on the ribosomal internal transcribed spacer region and 28S large subunit nrDNA supported the placement of the new species.


Phytotaxa ◽  
2018 ◽  
Vol 358 (1) ◽  
pp. 83 ◽  
Author(s):  
SOUMITRA PALOI ◽  
KANAD DAS ◽  
KRISHNENDU ACHARYA

Russula darjeelingensis is characterized by its small sized white pileus with a tall and narrow stipe, white spore print, basidiospores with amyloid suprahilar spot and a pileipellis containing encrusted pileocystidia and absence of primordial hyphae. The combination of all these characters and molecular phylogenetic analyses of internal transcribed spacer sequences of nuclear ribosomal DNA confirmed it as a new species in genus Russula Pers., subg. Russula Romagn. emend. sect. Polychromae (Maire) Sarnari subsect. Paraintegrinae Sarnari. A comprehensive morphological description, illustrations, and comparisons with morphologically similar and phylogenetically related species are provided in the present study.


Phytotaxa ◽  
2021 ◽  
Vol 508 (1) ◽  
Author(s):  
MING ZENG ◽  
ELENI GENTEKAKI ◽  
KEVIN D. HYDE ◽  
QI ZHAO

This paper describes five sarcosomataceous samples collected from southwestern China and provides an updated two locus phylogeny of Sarcosomataceae. Two new species, Donadinia echinacea and Plectania sichuanensis, are described based on morphological and phylogenetic analyses. Donadinia echinacea is a dematiaceous hyphomycete with pleurogenous, guttulate conidia. Plectania sichuanensis is a cup-fungus distinguished by its ochre hymenium and ellipsoid ascospores with small multiple oil droplets. Phylogenetic analysis based on ITS and LSU sequence data using broad taxon sampling supports establishment of the new species along with eight distinct clades within Sarcosomataceae.


Phytotaxa ◽  
2017 ◽  
Vol 309 (1) ◽  
pp. 45 ◽  
Author(s):  
MIN WANG ◽  
YUAN-YUAN CHEN

In this paper, two new species in Hyphodontia, H. bubalina and H. mongolica, are reported as new to science based on morphological characteristics and phylogenetic analyses. Detailed descriptions and illustrations are provided with comparisons among allied taxa. Hyphodontia bubalina has thin cream basidiomata, a monomitic hyphal system with thin- to slightly thick-walled generative hyphae, hyphoid or subulate cystidioles, ellipsoid to subglobose basidiospores measuring as 4–5.3 × 3–4.2 µm. Hyphodontia mongolica is characterized by the partly confluent or branched aculei, a monomitic hyphal system with thick-walled generative hyphae, clavate and tubular cystidia, and ellipsoid basidiospores measuring as 4.9–6.6 × 2.5–3.2 µm. Phylogenetic analyses based on the internal transcribed spacer (ITS) regions which performed by Bayesian (BI), maximum likelihood (ML) and maximum parsimony (MP) methods confirm to place the two species in the genus Hyphodontia.


MycoKeys ◽  
2019 ◽  
Vol 56 ◽  
pp. 101-129 ◽  
Author(s):  
Kanoksri Tasanathai ◽  
Wasana Noisripoom ◽  
Thanyarat Chaitika ◽  
Artit Khonsanit ◽  
Sasitorn Hasin ◽  
...  

Seven new species occurring on termites are added to Ophiocordyceps – O.asiatica, O.brunneirubra, O.khokpasiensis, O.mosingtoensis, O.pseudocommunis, O.pseudorhizoidea and O.termiticola, based on morphological and molecular phylogenetic evidence. O.brunneirubra possesses orange to reddish-brown immersed perithecia on cylindrical to clavate stromata. O.khokpasiensis, O.mosingtoensis and O.termiticola have pseudo-immersed perithecia while O.asiatica, O.pseudocommunis and O.pseudorhizoidea all possess superficial perithecia, reminiscent of O.communis and O.rhizoidea. Phylogenetic analyses based on a combined dataset comprising the internal transcribed spacer regions (ITS) and the largest subunit (LSU) of the ribosomal DNA, partial regions of the elongation factor 1-α (TEF) and the largest and second largest subunits for the RNA polymerase genes (RPB1, RPB2) strongly support the placement of these seven new species in Ophiocordyceps.


Botany ◽  
2014 ◽  
Vol 92 (1) ◽  
pp. 9-22 ◽  
Author(s):  
Christine C. Braaten ◽  
P. Brandon Matheny ◽  
Debra L. Viess ◽  
Michael G. Wood ◽  
Joseph H. Williams ◽  
...  

The secotioid form of fruit bodies of mushroom-forming fungi may be an intermediate evolutionary modification of epigeous agaricoid or pileate–stipitate forms (i.e., with pileus, spore-bearing tissues, and stipe) and typically hypogeous, gasteroid- or truffle-forming species, in which the fruit bodies have been reduced to enclosed structures containing modified spore-producing tissues. To date, only a single secotioid species (Auritella geoaustralis Matheny & Bougher ex Matheny & Bougher) has been described in the ectomycorrhizal family Inocybaceae, a hyperdiverse clade of ca. 500–700 species with a cosmopolitan distribution. Fieldwork in Australia and western North America, however, has revealed two novel secotioid forms of Inocybe (Fr.) Fr., the first to be formally described in the genus. In this investigation, we analyze their phylogenetic relationships using molecular sequence data from multiple unlinked loci to test whether these are environmental variants of agaricoid forms or represent independent lineages. Results of phylogenetic analyses suggest these fungi have converged to the secotioid form independently. However, the California secotioid taxon (Inocybe multifolia f. cryptophylla f. nov.) is a phenotypic variant of the newly described agaricoid taxon (Inocybe multifolia sp. nov.). Similarly, the Australian secotioid form (Inocybe bicornis f. secotioides f. nov.) is nested within a clade of otherwise agaricoid forms of a second novel species (Inocybe bicornis sp. nov.) described from southwest Western Australia. Overall, four species with sequestrate forms within Inocybaceae can now be recognized, three of which are distributed in Australia and one in western North America, in the genera Auritella and Inocybe.


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