Cryptogamic Unit

Hāora, India

Cryptogamic Unit

Hāora, India

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PubMed | Cryptogamic Unit, Naturalis Biodiversity Center, Scientific Institute of Public Health, Ghent University and 5 more.
Type: Journal Article | Journal: Fungal biology | Year: 2016

Lactarius subg. Russularia is a large group of milkcaps occurring almost worldwide and dominant in many ecosystems. In this study we focus on new diversity, evolutionary relationships, divergence time, and origin of the subgenus. Six conifer symbionts are described as new to science: Lactarius atrii, L. aurantionitidus, L. dombangensis, L. flavigalactus, L. lachungensis, and L. sikkimensis. Species delimitation is assessed based on the concordance between morphological characteristics and an ITS phylogeny. Infrageneric relationships were studied using a phylogeny constructed from concatenated ITS-rpb2 data using Maximum Likelihood and Bayesian inference. Results show that species in this subgenus do not cluster together according to their geographic origin. Intercontinental sister relationships between Europe/Asia/North America are common but actual conspecificity is rare. This result suggests that allopatric speciation has played an important role within this subgenus. Only few morphological characteristics tend to be phylogenetically informative, with the most important being presence or absence of true cystidia and the pileipellis structure. Two datasets were generated in order to estimate the age of L. subg. Russularia. The results suggest the origin of L. subg. Russularia to be in the Mid Miocene period.


Dutta A.K.,University of Calcutta | Das K.,Cryptogamic Unit | Acharya K.,University of Calcutta
Mycosphere | Year: 2015

A marasmioid fungus: Marasmius indopurpureostriatus (Marasmiaceae, Basidiomycota) is proposed here as new to science from Sikkim, a small Himalayan state in India. A comprehensive description with illustrations to aid in the identification, comparisons with morphologically similar taxa and an artificial key to the species of Marasmius sect. Globulares, previously reported from India are provided. © 2015.


Das K.,Cryptogamic Unit | Chakraborty D.,Cryptogamic Unit | Baghela A.,MACS Agharkar Research Institute | Singh S.K.,MACS Agharkar Research Institute | And 2 more authors.
Mycologia | Year: 2016

Xerocomus doodhcha and Hortiboletus indorubellus (Boletaceae) from broadleaf montane forest in Sikkim, India, are proposed as new. They are described in detail with supporting morphological illustrations and compared with related taxa using molecular phylogenetic analysis of ITS and 28S rDNA sequences. Xerocomus doodhcha is characterized by a pale brown pileus, basidiospores with a finely bacillate surface under SEM, and phylogenetic proximity to the type species of Xerocomus, X. subtomentosus. Hortiboletus indorubellus is characterized by a dark brown to reddish brown pileus, context that turns brownish to brownish orange on bruising, and phylogenetic proximity to Hortiboletus rubellus. © 2016 by The Mycological Society of America.


PubMed | Aberystwyth University, MACS Agharkar Research Institute and Cryptogamic Unit
Type: Journal Article | Journal: Mycologia | Year: 2016

Xerocomus doodhcha and Hortiboletus indorubellus (Boletaceae) from broadleaf montane forest in Sikkim, India, are proposed as new. They are described in detail with supporting morphological illustrations and compared with related taxa using molecular phylogenetic analysis of ITS and 28S rDNA sequences. Xerocomus doodhcha is characterized by a pale brown pileus, basidiospores with a finely bacillate surface under SEM, and phylogenetic proximity to the type species of Xerocomus, X. subtomentosus Hortiboletus indorubellus is characterized by a dark brown to reddish brown pileus, context that turns brownish to brownish orange on bruising, and phylogenetic proximity to Hortiboletus rubellus.


Das K.,Cryptogamic Unit | Dentinger B.T.M.,Jodrell Laboratory | Dentinger B.T.M.,Aberystwyth University
Kew Bulletin | Year: 2015

Austroboletus olivaceoglutinosus sp. nov., is described from subalpine coniferous forest in northern Sikkim, India. It can be immediately recognised in the field by its glutinous, olive (often umbonate) pileus, overhanging margin that covers the hymenophore completely in young basidiomata, white to yellow lacunose-reticulate or lacerate, exceptionally long (100 – 180 × 13 – 17 mm) stipe and a strong fruity odour. Its relationship with allied taxa is discussed. © 2015, The Board of Trustees of the Royal Botanic Gardens, Kew.


Bhaumik M.B.,Arunachal Pradesh Regional Center | Pathak M.K.,Cryptogamic Unit
Taiwania | Year: 2011

Carex sanjappae M. Bhaumik & M.K. Pathak and Carex speciosa Kunth ssp. varmae M. Bhaumik & M.K. Pathak a new species and subspecies respectively are described and illustrated from Arunachal Pradesh, India. New species Carex sanjappae M. Bhaumik & M.K. Pathak belongs to the section 'rarae', characterized by longer spikes, utricle longer, wider and truncate aperture at apex. Comparative analyses of characters of closely related species are given in a table. Whereas new subspecies Carex speciosa ssp varmae M. Bhaumik & M. K. Pathak is worth recognizing by its longer, strongly hispidulous utricles and narrower leaves. A dichotomous key is provided for easy recognition from other subspecies.


Das K.,Cryptogamic Unit | Parihar A.,Cryptogamic Unit | Hembrom M.E.,Botanical Survey of India
Turkish Journal of Botany | Year: 2015

Bondarzewia zonata, collected from North Sikkim, is proposed here as new to science. It is characterized by basidiomata with strong zonate pilei, thin context turning persistent dark red with guaiacol, comparatively small spores with narrow ornamented ridges, and an absence of cystidioles. A detailed description coupled with macro-and micromorphological illustrations of this species is provided. Its relation to the allied species is discussed and a provisional key to the species of Bondarzewia is given. © TÜBİTAK.


Das K.,Cryptogamic Unit | Hembrom M.E.,Botanical Survey of India | Parihar A.,Cryptogamic Unit | Zhao R.L.,CAS Institute of Microbiology
Turkish Journal of Botany | Year: 2016

The Acharya Jagadish Chandra Bose Indian Botanic Garden is a well-known botanical garden. Cyathus thindii, a new species of bird’s nest fungus, was collected from this garden, and is described and illustrated in the present paper. It is distinct with its sessile basidiomata growing on a white mycelial pad, plicate exterior (partly) and interior wall of the peridium, comparatively large peridioles without tunica, and medium sized spores. Its relation with allied taxa is discussed and a provisional key to the Indian species of Cyathus is given in the present paper. © TÜBİTAK.


Das K.,Cryptogamic Unit | Chakraborty D.,Cryptogamic Unit | Cotter H.V.T.,Duke University
Phytotaxa | Year: 2015

Suillus adhikarii is described and illustrated as a new species based on morphology and ecology from the subalpine regions of Nepal and India. It is presumably an ectomycorrhizal fungus in association with Larix griffithiana and L. himalaica. This species is compared with the other closely related taxa of Suillus which have been reported in association with Larix from the Himalaya. A key to the Suillus species associated with Larix known from the Himalaya is provided. © 2015 Magnolia Press.


Das K.,Cryptogamic Unit | Chakraborty D.,Cryptogamic Unit
Mycotaxon | Year: 2014

Lactarius vesterholtii is proposed as new to science. It is characterized by a greyish brown dry subvelutinous pileus, very crowded light yellow lamellae turning orange when bruised, white copious latex becoming reddish orange in contact with the lamellae, a light yellow spore print, amyloid basidiospores ornamented with high ridges that forms an incomplete reticulum, the absence of pleuro- and cheilomacrocystidia, a trichopalisade to lamprotrichopalisade-type pileipellis, and a palisade to lampropalisade-type stipitipellis. The new species is compared with allied Asian and extralimital taxa. A key to the Indian taxa of L. subg. Plinthogali is also provided. © 2014. Mycotaxon, Ltd.

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