Two new asexual genera and six new asexual species in the family Microthyriaceae (Dothideomycetes, Ascomycota) from China Author Qiao, Min Laboratory for Conservation and Utilization of Bio-resources, Key Laboratory for Microbial Resources of the Ministry of Education, Yunnan University, Kunming, Yunnan, 650091, China Author Zheng, Hua Laboratory for Conservation and Utilization of Bio-resources, Key Laboratory for Microbial Resources of the Ministry of Education, Yunnan University, Kunming, Yunnan, 650091, China & School of Life Sciences, Yunnan University, Kunming, Yunnan, 650091, China Author Guo, Ji-Shu Laboratory for Conservation and Utilization of Bio-resources, Key Laboratory for Microbial Resources of the Ministry of Education, Yunnan University, Kunming, Yunnan, 650091, China & School of Life Sciences, Yunnan University, Kunming, Yunnan, 650091, China Author Castaneda-Ruiz, Rafael F. https://orcid.org/0000-0003-0063-3265 Instituto de Investigaciones Fundamentales en Agricultura Tropical " Alejandro de Humboldt " (INIFAT), 17200, La Habana, Cuba Author Xu, Jian-Ping Laboratory for Conservation and Utilization of Bio-resources, Key Laboratory for Microbial Resources of the Ministry of Education, Yunnan University, Kunming, Yunnan, 650091, China & Department of Biology, McMaster University, Hamilton, Ontario, L 8 S 4 K 1, Canada Author Peng, Jie Laboratory for Conservation and Utilization of Bio-resources, Key Laboratory for Microbial Resources of the Ministry of Education, Yunnan University, Kunming, Yunnan, 650091, China & School of Life Sciences, Yunnan University, Kunming, Yunnan, 650091, China Author Zhang, Ke-Qin Laboratory for Conservation and Utilization of Bio-resources, Key Laboratory for Microbial Resources of the Ministry of Education, Yunnan University, Kunming, Yunnan, 650091, China Author Yu, Ze-Fen Laboratory for Conservation and Utilization of Bio-resources, Key Laboratory for Microbial Resources of the Ministry of Education, Yunnan University, Kunming, Yunnan, 650091, China zfyu2021@163.com text MycoKeys 2021 2021-11-29 85 1 30 http://dx.doi.org/10.3897/mycokeys.85.70829 journal article http://dx.doi.org/10.3897/mycokeys.85.70829 1314-4049-85-1 F28559203A3D5CC7B888A4C2892F7880 Antidactylaria minifimbriata Z.F. Yu, M. Qiao & R.F. Castaneda sp. nov. Figs 2 , 9a Etymology. Latin, mini , meaning very small, minute, fimbriata , referring to edged, delicately toothed, fringe or frill that remained on the conidial base after rhexolytic secession. Figure 2. Antidactylaria minifimbriata (Holotype YMF 1.04578) a-c conidia d conidiophore and conidiogenous cell e conidia on conidiophore under low objective. Scale bars: 10 µm ( a-d ); 50 µm ( e ). Description. Asexual morph hyphomycetous. Colonies on CMA white to rosy buff, reverse buff, attaining 2.7 cm diam. after 20 days at 25 °C. Mycelium partly superficial, partly immersed, composed of branched, slender, septate, hyaline, smooth-walled hyphae. Conidiophores semi-macronematous, mononematous, cylindrical, straight or slightly flexuous, unbranched, 0-1(-2)-septate, hyaline or pale brown, smooth, sometimes reduced to conidiogenous cells. Conidiogenous cells polyblastic, sympodial elongated, terminal, denticulate, denticles cylindrical, minute fringed. Conidia solitary, acrogenous, narrow obclavate, cylindrical to fusiform, attenuate, rostrate or caudate towards the apex, 27.7-40 x 2.5-3.3 µm , rostrum 10-19 x 1-1.8 µm , 2-septate, hyaline to subhyaline, smooth-walled, with a minute basal frill. Sexual state: unknown. Type . China , Hainan Province , Diaoluoshan National Forest Park , on submerged leaves, April 2014 , Z.F Yu. Holotype YMF 1.04578, preserved in a metabolically-inactive state (deep freezing) in the Conservation and Utilization of Bio-Resources in Yunnan . Ex-type culture CGMCC 3.18825. Notes. Morphologically, Antidactylaria minifimbriata is similar to A. ampulliforma (= Isthmolongispora ampulliformis ) in conidial shape, but can be easily distinguished from it by having wider conidia (2.5-3.3 vs. 2.0-2.5 µm ) and longer rostrum (10.0-19.0 vs. 6.0-10.0 µm ) ( Yen et al. 2017 ).