Two Novel Species of Talaromyces Discovered in a Karst Cave in the Satun UNESCO Global Geopark of Southern Thailand

Salilaporn Nuankaew; Charuwan Chuaseeharonnachai; Sita Preedanon; Sayanh Somrithipol; Supicha Saengkaewsuk; Papichaya Kwantong; Sarinya Phookongchai; Prasert Srikitikulchai; Noppol Kobmoo; Xin-Cun Wang; Zhi-Feng Zhang; Lei Cai; Satinee Suetrong; Nattawut Boonyuen

Two Novel Species of Talaromyces Discovered in a Karst Cave in the Satun UNESCO Global Geopark of Southern Thailand

Salilaporn Nuankaew; Charuwan Chuaseeharonnachai; Sita Preedanon; Sayanh Somrithipol; Supicha Saengkaewsuk; Papichaya Kwantong; Sarinya Phookongchai; Prasert Srikitikulchai; Noppol Kobmoo; Xin-Cun Wang; Zhi-Feng Zhang; Lei Cai; Satinee Suetrong; Nattawut Boonyuen

Karst caves are oligotrophic environments that appear to support a high diversity of fungi. Studies of fungi in Thailand&rsquo:s caves are limited. During a 2019 exploration of the mycobiota associated with soil samples from a karst cave, namely, Phu Pha Phet in the Satun UNESCO Global Geopark in Satun Province, southern Thailand, two previously undescribed fungi belonging to Talaromyces (Trichocomaceae, Eurotiales, Eurotiomycetes) were studied using a polyphasic approach combining phenotypic and molecular data. Based on datasets of four loci (ITS, BenA, CaM, and RPB2), phylogenetic trees of the section Trachyspermi were constructed, and two new species&mdash:Talaromyces phuphaphetensis sp. nov. and T. satunensis sp. nov.&mdash:phylogenetically related to T. subericola, T. resinae, and T. brasiliensis, are described. Detailed descriptions and illustrations of the new species are provided. This study increases the number of cave-dwelling soil fungi discovered in Thailand&rsquo:s Satun UNESCO Global Geopark, which appears to be a unique environment with a high potential for discovering fungal species previously undescribed.

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