Sutorius: a new genus for Boletus eximius

Abstract

Sutorius is described as a new genus of Boletaceae to accommodate Boletus robustus originally named illegitimately by C.C. Frost from eastern North America. The legitimate name, Boletus eximius, provided by C.H. Peck, has been used since for a dark purple to chocolate brown bolete with finely scaly stipe and reddish brown spore deposit. This iconic taxon has been documented on five continents. Despite the straightforward species identification from morphology, the interpretation of stipe macro-morphology and spore color has led to equivocal generic placement. Phylogenetic analyses of genes encoding large subunit rRNA and translation elongation factor 1α confirm Sutorius as a unique generic lineage in the Boletaceae. Two species are recognized based on multiple accessions: S. eximius, represented by collections from North America, Costa Rica, Guyana, Indonesia and Japan (molecular data are lacking for only the Guyanan and Japanese material); and S. australiensis, represented by material from Queensland, Australia. Additional collections from Zambia and Thailand represent independent lineages, but sampling is insufficient to describe new species for these entities.

Anatomical structure of pores in European species of genera Boletus s.str. and Butyriboletus (Boletaceae).

“…has also become obvious from phylograms published in some other works (e.g. Desjardin et al 2009, Halling et al 2012. Therefore a division of Boletus s.l.…”

The genus Imleria (Boletaceae) in East Asia

“…Multi-gene phylogenetic analysis has been applied to the phylogenetic studies of boletes in the last fifteen years and several new genera and many new species have been uncovered in Boletales, supported with morphological and molecular evidence (Binder & Bresinsky 2002;halling et al 2007;desjardin et al 2008Li et al 2009Li et al , 2011Zeng et al 2012Zeng et al , 2013Feng et al 2012;Neves et al 2012;halling et al 2012;hosen et al 2013;Zhao et al 2014).…”

PEMANFAATAN EKTOMIKORIZA YANG BERASOSIASI DENGAN FUNGI PELAWAN PADA PERTUMBUHAN STEK PUCUK Tristaniopsis obovata

“…Hasil identifikasi secara molekuler pada tubuh buah fungi pelawan menghasilkan wilayah yang teramplifikasi oleh primer ITS masih pendek sehingga indek kesamaannya tidak bisa spesifik, dan berkumpul pada clade Boletaceae. Penelitian sebelumnya menjelaskan bahwa melalui phylogenetic tree terjadi perbedaan posisi antara Boletus dan Heimioporus meski keduanya termasuk ke dalam satu famili Boletaceae (Halling et al, 2015). Penelitian yang dilakukan oleh (Tasuruni, 2012) (Brundrett et al, 1996).…”

“…Hasil ini mengindikasikan dan sejalan dengan hasil penelitian sebelumnya bahwa fungi pelawan sangat sulit diisolasi dan dibiakan pada media sintetik biasa (Tasuruni, 2012). Bentuk spora fungi pelawan adalah retikulat atau berjala, mirip dengan Strobilomyces (Halling et al, 2015), dan berkesesuaian dengan bentuk spora yang diperoleh dari hasil trapping dari tubuh buah langsung di lapangan. Spora yang berbentuk retikulat sangat hidropobik, dan pada kondisi lembap akan terbang dan mencari habitat yang lebih cocok (Hoppe & Schwippert, 2014 Keterangan (Remarks): 1 = saprofit (saprophyte), 2 = parasit (parasitic), 3 = ektomikoriza (ectomycorrhiza), 4 = pelapuk (decomposer), 5 = patogen (pathogenic).…”