Acidothrix acidophila Hujslová & M. Kolařík, in Hujslová et al., Mycol. Progr. 13(3): 824 (2014)

On highly acidic soil. Sexual morph: Undetermined. Asexual morph: Hyphomycetous, sporulation abundant. Conidiophores acrodontium–like, semi-macronematous, single phialide, sometimes macronematous consisting of two to six phialides, sometimes in verticillate arrangement (prostrate). Conidiogenous cells modified to phialides, proliferating sympodially forming a long rachis. Conidia formed on the proliferating conidiogenous cells, single, globose, or ellipsoidal to lacrimose, with hilum, sometimes budding, giving rise to another conidium, first conidium on the phialide is larger.

Notes ─ Acidothrix acidophila is characterized by the hyphomycete asexual morph producing plane colonies, with abundant aerial mycelium forming floccules and funicules. Conidiophores are acrodontium–like, bearing hyaline, globose-ellipsoidal conidia (Hujslová et al. 2014). The sexual morph of A. acidophila has not been reported. The type culture is deposited at CBS. A detailed description and a culture based illustration is provided in Hujslová et al. (2014).

Fig. Acidothrix acidophila (redrawn from Hujslová et al. 2014). a, c Conidiophores and conidia. b Conidia proliferating by hyphae and bearing other conidia. d Conidia. – Scale bars: a-d = 10 μm.