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Lepiotaceous fungi of West Bengal, India: two new species of Leucoagaricus

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Abstract

Two new species, Leucoagaricus tropicus and Leucoagaricus brunneodiscus, are described from West Bengal, Eastern India, based on morphological details and phylogenetic analyses. Leucoagaricus tropicus is characterized by its white, medium-sized pileus with a brown to dark brown umbo, a white stipe that directly changes to brownish-red or brown on bruising or with KOH, ellipsoid basidiospores with inconspicuous germ pore, dimorphic cheilocystidia, narrowly clavate to narrowly fusiform cystidioid elements on the annulus and small cystidioid elements of the pileus covering. Leucoagaricus brunneodiscus is distinguished by the presence of colourless to orange-white drops on the stipe, brownish-orange to brown annulus with dark brown edge, ellipsoid basidiospores without a germ pore and small, clavate cheilocystidia. Detailed descriptions, field photographs of the collected basidiomata, comparisons with morphologically similar and phylogenetically related species and a phylogram generated from the combined dataset of nrITS and LSU sequences are provided. An artificial key to all Leucoagaricus taxa reported in India is also provided.

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Data availability

Sequence data generated for the present study have been deposited in GenBank with the accession numbers MK412616, MT669365, MT669367, MT669370, MT669371, MT940572, MT940574, MT940575, MT943754. The alignment file generated during the current study for conducting phylogenetic analyses is available in TreeBASE (http://purl.org/phylo/treebase/phylows/study/TB2:S27571).

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Acknowledgements

The authors are grateful to Dr. Else C. Vellinga for helping with necessary literature and critically reviewing the manuscript and providing constructive comments. Thank you to Sean Swift for collecting and photographing La. tropicus in Hawai‘i. The DST-FIST (Project No. SR/FST/LSI-630/2015) facility in the Department of Botany, West Bengal State University, is also acknowledged for the present study.

Funding

The Department of Science and Technology (DST), New Delhi, India, is acknowledged for funding in the form of DST-Inspire Faculty Fellowship (DST/INSPIRE/04/2018/001906, dated 24 July, 2018) to Arun Kumar Dutta.

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Authors and Affiliations

  1. Department of Botany, West Bengal State University, North 24 Parganas, PIN-700126, Barasat, West Bengal, India

    Arun Kumar Dutta, Soumili Bera & Enjamul Hoque

  2. Department of Botany and Plant Pathology, Purdue University, West Lafayette, IN, 47907, USA

    Jeffery Kirk Stallman

  3. National Center for Genetic Engineering and Biotechnology (BIOTEC), National Science and Technology Development Agency, Ministry of Higher Education, Science, Research and Innovation, 113 Soi Klong Luang 17, Khlong Nueng, Khlong Luang District, Pathum Thani, 12120, Thailand

    Soumitra Paloi

  4. Molecular and Applied Mycology and Plant Pathology Laboratory, Department of Botany, University of Calcutta, 35, Ballygunge Circular Road, Kolkata, West Bengal, 700019, India

    Krishnendu Acharya

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  1. Arun Kumar Dutta
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  3. Soumili Bera
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Contributions

Arun Kumar Dutta contributed to the study conception and design. Material preparation and data collection was performed by Arun Kumar Dutta, Jeffery Kirk Stallman, Soumili Bera, Krishnendu Acharya and Enjamul Hoque. Data analysis was performed by Arun Kumar Dutta and Jeffery Kirk Stallman. The first draft of the manuscript was written by Arun Kumar Dutta, Jeffery Kirk Stallman and Soumitra Paloi, and all authors commented on previous versions of the manuscript. All authors read and approved the final manuscript.

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Correspondence to Arun Kumar Dutta.

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Dutta, A.K., Stallman, J.K., Bera, S. et al. Lepiotaceous fungi of West Bengal, India: two new species of Leucoagaricus. Mycol Progress 20, 493–507 (2021). https://doi.org/10.1007/s11557-021-01685-w

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