A first synopsis of lichenicolous fungi of Mongolia, with the description of five new species

Abstract

A first synopsis of lichenicolous fungi of Mongolia based on new collections and literature data is provided, including 114 species. Five new species are described: Capronia cogtii (on Vahliella leucophaea), Echinothecium hypogymniae (on Hypogymnia bitteri), Feltgeniomyces mongolicus (on H. bitteri), Phacopsis vulpicidae (on Vulpicida juniperina) and Roselliniella javkhlanae (on Rinodina turfacea var. ecrustacea). Two new combinations are proposed: Endococcus hafellneri (≡ Stigmidium hafellneri) and Sphaerellothecium taimyricum (≡ Sphaerellothecium thamnoliae var. taimyricum). Unidentified specimens of Acremonium (on Mycoblastus sanguinarioides), Cercidospora (on Rhizoplaca chrysoleuca s.lat.), Didymocyrtis (on Rhizoplaca chrysoleuca s.lat.), Lichenochora (on Physcia alnophila), Lichenostigma (on species of Xanthoparmelia), Phoma (on Vulpicida juniperina) and a leotialean fungus (on Cetraria laevigata) are characterized and discussed. Taxonomic notes are provided for Cercidospora macrospora s.lat., Didymocyrtis cf. melanelixiae, Minutoexcipula cf. beaglei, Nesolechia cetrariicola, Sphaerellothecium cf. parmeliae and Stigmidium cf. psorae. Sphaeropezia intermedia is newly reported for Eurasia. Didymocyrtis grumantiana is newly reported for Asia. Additionally, 71 species of lichenicolous fungi and five species of lichenicolous lichens are documented in Mongolia for the first time. Allocetraria is reported as a new host genus for Abrothallus peyritschii, Vulpicida for Arthonia triebeliae, and Anamylopsora for Muellerella pygmaea.

Contributions to the knowledge of lichenicolous fungi growing on baeomycetoid lichens andIcmadophila, with a key to the species

“…(2019), Zhurbenko et al . (2019) and the present paper. Total counts for the ‘family as a whole’ may not reflect numbers in the columns as different species of lichenicolous fungi may occur on more than one host genus.…”

“…Numbers in parentheses indicate the number of species known to occur only on this genus. Based on data fromEtayo (2010),Zhurbenko (2010bZhurbenko ( , 2012,Diederich et al (2018a),Motiejūnaitė et al (2019),Zhurbenko et al (2019) and the present paper. Total counts for the 'family as a whole' may not reflect numbers in the columns as different species of lichenicolous fungi may occur on more than one host genus.…”

Lichenicolous fungi from the Holarctic. Part III: New reports and a key to species on Hypogymnia

“…-This fungus is characterized by more or less superficial, subglobose, stromatic, pycnidioid conidiomata, 40-95 um in diameter, with wide, often splitted opening, sometimes eventually collapsed exciple (which makes the conidiomata look like sporodochia), conidiophores similar to stromatic cells, enteroblastic, terminal, discrete, ampulliform to obpyriform, sometimes percurrently proliferating, olivaceous brown conidiogenous cells, and olivaceous brown, solitary, subglobose, ellipsoid, oblong, narrowly obovate, occasionally cuneiform, reniform or irregular in shape, sometimes truncated at the base, aseptate, rough but not distinctly verruculose conidia. In the type material a distinct exciple was not observed apparently due to destruction in the later stages of development and the conidiomata were charactrized as sporodochial (Zhurbenko et al 2019). Additionally, the specimen cited here differs from the protologue in having somewhat longer conidia, (6.7-)7.8-10.6(-13.0) x (4.25)4.4-5.2(-5.9) um, L/B = (1.4-)1.6-2.1(-2.9) (n = 50) versus (5.4-)6.3-8.1(-9.3) x (4.0-)4.3-5.1(-5.5) um, L/B = (1.1-)1.3-1.7(-2.1).…”

“…found on species of Cetraria (the type host), Flavocetraria, Lecidea and Rhizoplaca (Darmostuk & Khodosovtsev 2019, Khodosovtsev et al 2016, Zhurbenko et al 2020). However, K. cetrariae can be distinguished by its holoblastic conidiogenesis and brown, not basally truncated, finally verruculose conidia (Khodosovtsev et al 2016, Zhurbenko et al 2019). This species was recently described from Mongolia where it was found on Hypogymnia bitteri (Zhurbenko et al 2019) and previously known only from the type collection.…”

“…However, K. cetrariae can be distinguished by its holoblastic conidiogenesis and brown, not basally truncated, finally verruculose conidia (Khodosovtsev et al 2016, Zhurbenko et al 2019). This species was recently described from Mongolia where it was found on Hypogymnia bitteri (Zhurbenko et al 2019) and previously known only from the type collection. This is the first report from the Arctic, U.S.A. and North America.…”