Samsoniella hymenopterorum 2020

Samsoniella hymenopterorum W.H. Chen, Y.F. Han & Z.Q. Liang 2020

MycoBank No: 831736

Holotype: China, Guizhou Province, Xishui County, at 28°29'56.70"N, 106°24'31.04"E, July 2018, Jiandong Liang, holotype GZAC A1952, ex-type culture GZAC A19522. Sequences from isolated strain A19522 have been deposited in GenBank with accession numbers: ITS = MN128224, RPB1 = MT642603, RPB2 = MT642604 and TEF = MN101588.

Morphological description

Colonies on PDA, 6.2–6.4 cm diam. in 14 d at 25 °C, white, consisting of a basal felt and cottony, floccose hyphal overgrowth, reverse yellowish. Prostrate hyphae smooth, septate, hyaline, 1.1–1.6 μm diam. Erect conidiophores usually arising from aerial hyphae, Isaria-like with phialides in whorls of three to four. Phialides 6.5–10.6 × 1.2–2.0 μm, with a cylindrical basal portion, tapering to a distinct neck. Conidia in chains, hyaline, fusiform to ovoid, 1-celled, 1.9–2.5 × 1.5–2.1 μm. Chlamydospores and synnemata not observed. Size and shape of phialides and conidia similar in culture and on natural substratum. Sexual state not observed.

Habitat: Bee, family Vespidae.

Distribution: Xishui County, Guizhou Province, China.

GenBank Accession: ITS = MN128224, RPB1 = MT642603, RPB2 = MT642604 and TEF = MN101588.

Notes: 

Reference: Chen W-H, Han Y-F, Liang J-D et al.(2020) Morphological and phylogenetic characterisations reveal three new species of Samsoniella (Cordycipitaceae, Hypocreales) from Guizhou, China. MycoKeys 74: 1–15. https://doi.org/10.3897/mycokeys.74.56655

Samsoniella hymenopterorum A infected insect (Hymenoptera) B, C top (B) and underside (C) of a colony cultured on PDA medium at 14 d D–H, J phialides and conidia in chains K conidiophore and phialides I conidia. Scale bars: 10 mm (B, C); 10 μm (D–K).