Compsomyces verticillatus (Thaxt.) Thaxt.

Santamaria, Sergi & Pedersen, Jan, 2021, Laboulbeniomycetes (Fungi, Ascomycota) of Denmark, European Journal of Taxonomy 781, pp. 1-425 : 44

Compsomyces verticillatus (Thaxt.) Thaxt.

MB#245733

Fig. 5C–E

Proceedings of the American Academy of Arts and Sciences 29: 96 ( Thaxter 1894). – Basionym: Cantharomyces verticillata Thaxt., Proceedings of the American Academy of Arts and Sciences 25: 9 ( Thaxter 1890) [MB#175236]. –

Type: “ On Sunius longiusculus , Anna, Ill. (S.A. Forbes)”; FH. [ USA]

Diagnostic features

Each row of perithecial outer wall cells consists of 6–8 subequal cells ( Fig. 5E , arrows). Cell II usually gives rise to 2–5 appendages which appear to be verticillate when 3–5 of such appendages are present. [Detailed descriptions: Thaxter 1896; Santamaria 2003]

Distribution and hosts

On Astenus (sometimes as Sunius Stephens, 1829 in old literature) (Col. Staphylinidae Paederinae ) from USA (type), Argentina ( Spegazzini 1912), Germany ( Scheloske 1969), Italy ( Rossi & Cesari Rossi 1981), Spain ( Santamaria 1995b), and Sweden ( Huggert 2010).

Collections examined from Denmark

On Astenus gracilis (Paykull, 1789) (Col. Staphylinidae Paederinae )

DENMARK – Fyn (F) • Drejø ; 54°58.141′ N, 10°25.237′ E; NF99; 30 Oct. 1936; Christiani Dry0117; JP det.; ZMUC C-F-124184 .

Remarks

First record from Denmark. Neither the host nor the fungus seem to be common in Denmark.

Figures

Fig. 5. Compsomyces spp. A–B. C. lestevae Thaxt. A. Mature thallus showing antheridium (an) and perithecial wall cells (arrows). B. Immature thallus showing antheridium (an). – C–E. C. verticillatus (Thaxt.) Thaxt. C–D. Mature thalli. E. Detail of perithecium labelling eight wall cells (arrows). Scale bars: A–D = 50 µm; E = 20 µm. Photographs from slides ZMUC C-F-122939 (A–B), and ZMUC C-F- 124184 (C–E).