Samsoniella coleopterorum 2020

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

MycoBank No: 831735

Holotype: China, Guizhou Province, Xishui County (28°29'56.70"N, 106°24'31.04"E), July 2018, Jiandong Liang, holotype GZAC A1950, ex-type culture GZAC A19501. Sequences from isolated strain A19501 have been deposited in GenBank with accession numbers: ITS = MT626376, RPB1 = MT642600, RPB2 = MN101585 and TEF = MN101586.

Morphological description

Colonies on PDA, 3.6–4.0 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, 1.1–1.8 μm diam. Erect conidiophores usually arising from aerial hyphae, Isaria-like with phialides in whorls of two to four. Phialides 5.4–9.7 × 1.2–1.8 μm, with a cylindrical to ellipsoidal basal portion, tapering into a short distinct neck. Conidia in chains, hyaline, fusiform, ellipsoidal or subglobose, one-celled, 1.7–2.5 × 1.2–1.8 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: Snout beetle, family Curculionidae.

Distribution: Xishui County, Guizhou Province, China.

GenBank Accession: ITS = MT626376, RPB1 = MT642600, RPB2 = MN101585 and TEF = MN101586.

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