Neoconidiobolus pseudothromboides B. Huang & Y. Nie, 2022

Nie, Yong, Wang, Zi-Min, Zhou, Zheng-Yu, Zhao, Heng, Liu, Xiao-Yong & Huang, Bo, 2022, A new species of Neoconidiobolus (Entomophthorales, Ancylistaceae) from China based on morphological, molecular and physiological evidences, Phytotaxa 574 (2), pp. 149-157 : 152

Neoconidiobolus pseudothromboides B. Huang & Y. Nie , sp. nov., FIGURE 2

MycoBank no.: MB843838

Etymology. pseudothromboides (Lat.) , referring to the similarity of this fungus to Neoconidiobolus thromboides .

Known distribution. Anhui Province, China.

Maximum growth temperature. 31 °C.

Specimens examined. China, Anhui Province, Ma’anshan City, Cuiluo Mountain , 31°65′ N, 118°46′ E, from plant detritus, 7 Oct 2021, Z.M. Wang and Z.Y. Zhou, holotype JGXY 211007 . Ex-type culture RCEF 6692 . GenBank: nucLSU = ON391168 ; EFL = OL286957; mtSSU = ON310965 ).

Description. Colonies white, reaching ca 13 mm diameter on PDA for 3 d at 21 °C. Mycelia colorless, 4.0–9.0 µm wide, rarely branched at the edge, often septate and distended to segments with a width of 11.0–20.0 μm after 3 d. Primary conidiophores colorless, unbranched and producing a single conidium, 70.0–220.0 × 6.0–10.0 µm. Primary conidia forcibly discharged, colorless, globose, 20.0–25.0 µm wide and 24.0–30.0 µm long, with a small basal papilla 5.0–9.0 µm wide and 2.0–4.0 µm long. Secondary conidia only one type, discharged on 2 % water agar, arising from the primary ones which were similar in shape and smaller in size. Zygospores commonly formed between 2 contiguous segments of the same hypha after 5 d. Mature zygospores including not only a big globule located on one side, but also many smaller globules surround the big globule, smooth, colorless, mostly globose to subglobose, 15.0–25.0 μm in diameter with a wall 1.0–2.0 μm thick.

Figures

FIGURE 2. Neoconidiobolus pseudothromboides sp. nov. RCEF 6692. A, Colony on PDA after 3 d at 21 ˚C; b, Mycelia rarely branched at the edge; c, Mycelia septate and distended like a block; d, e,f, Single primary conidiophores bearing a primary conidium; g, h, Primary conidia with small basal papilla; i, j, Secondary conidia producing from primary ones; k, Zygospores formed between segments of the same hyphae; l, Young zygospores; m, Mature zygospores. — Scale bars: a = 10 mm; b = 100 μm; c–m = 20 μm.