ABSTRACT. A checklist of Indiana microfungi was compiled as part of a larger project documenting fungi within the state. The checklist is comprised of records from digitized specimen data available from the Mycology Collections Portal (http://mycoportal.org) as well as those from the scientific literature. Over 19.000 records of Indiana fungi were examined and 1429 microfungi species are documented in this publication. The species included in this checklist represent 61 orders from seven major phyla, one of these representing chromistan fungi not included in the Eumycota. Overall, approximately 50% of these arc reported from Indiana for the first time.

Keywords: Ascomycota, Basidiomycota, checklist. Eumycota, microfungi, taxonomy

INTRODUCTION

As part of a larger effort to document fungi within Indiana, a checklist of macrofungi was published by Bates and colleagues (2017), which was to be the first of a series of three papers (I: macrofungi, II: microfungi, and III: lichens) covering the diversity of fungi within the state. Subsequently, another worker produced a checklist for lichenized groups of fungi (lichens) for the state (Lendemer 2017). Thus, presented here is a checklist for Indiana microfungi, now the last in the series, to complete our broader project goals. Microfungi represent fungal species (Figs. 1-4) that are difficult to observe with the unaided eye (viz. requiring the use of a microscope). Overall, the microfungi account for approximately 4500 genera and 56,000 species in the Eumycota (Kirk et al. 2009; see http://www.microfungi, org/tablel). The Chromistan "fungi' (microorganisms with fungus-like lifestyles but not closely related to the Eumycota) are also included here. The groups of microfungi include common molds (e.g., Cladosporium herbarum), entomopathogenic species (e.g., Cordyceps militaris), highly toxic colonizers of beans, grains, and nuts (e.g., Aspergillusflavus), horticultural pests (e.g., Erysiphe cichoracearum), interesting decomposers of plant matter (e.g., Scutellinia scutellata), obligate insect ectoparasites (e.g., Corethromyces cryptobii), opportunistic human pathogens (e.g., Aspergillus lerreus), as well as phytopathogens of critical agricultural importance (e.g., Puccinia graminis).

For the broader project over 19,000 digitized records of fungal specimens available online in public databases were examined for the study, with ca. 1400 species of macrofungi (i.e., mushrooms) being recorded in the first publication of our series (Bates et al. 2017). To supplement the digitized record data, we also carried out online searches in the scientific literature for records of microfungi from the state. We discovered a number of records of Indiana microfungi within digitized publications (e.g., Anderson & Anderson 1920; Coulter 1897; Fink & Fuson 1920; Jackson 1918. 1921a, b; Osner 1917; Ramsey 1915; Van Hook 1911-1913, 1916, 1921a, 1921b, 1922, 1924-1926, 1935; Van Hook & Busteed 1935) from the Proceedings of the Indiana Academy of Science, which also included a series of publications devoted to documenting microfungal phytopathogens from the state (e.g., Gardner 1921a, 1921b, 1924a, 1924b, 1925-1929; Gardner & Mains 1930; Ruhl et al. 1983-1991). Some records recovered were also published in the broader literature (e.g., Harmon & Latin 2005; Wilson et al. 2014). We report here on the significant microfungal diversity known to exist across Indiana, which represents several major...