Monoicomyces nigrescens Thaxt.

MB#189290

Fig. 89F–G

Proceedings of the American Academy of Arts and Sciences 38: 10 (Thaxter 1902). –

Type: “ U.S.A.: On Calodera sp., Intervale, N.H., Jul. 1909, R. Thaxter 1359 (FH–2452, type) (according to Santamaria 1996c)”; FH.

Diagnostic features

Cell III entirely darkened (Fig. 89F). Primary appendage unbranched, short, consisting of up to four cells. Antheridia dark towards the base and margin, bearing two secondary appendages. Each antheridium including four phialides. Stalk cell of perithecium narrowed and darkened near the base. [Detailed descriptions: Thaxter 1908; Majewski 1994b; Santamaria 1996c]

Distribution and hosts

Reported on many genera and species of Aleocharinae (Col. Staphylinidae) like Atheta and Tachyusa, but also on others. Recorded from Europe: the Netherlands, Germany, Italy, Poland, Spain, United Kingdom, Portugal (Majewski 2008), Sweden (Huggert 2010), Czech Republic (Rossi et al. 2010), and Belgium (De Kesel et al. 2020); America: USA (type), Argentina (Spegazzini 1912), and Uruguay (Spegazzini 1917); and Asia: Japan (Majewski 1988). The record from Sri Lanka (Thaxter 1931) was described as a separate species by Santamaria (1996c) ( M. ceylonensis).

Collections examined from Denmark

On Dilacra luteipes (Erichson, 1837) (Col. Staphylinidae Aleocharinae) DENMARK – Nordøstsjaelland (NEZ) • Ledreborg; 55°36.740′ N, 11°58.456′ E; PG86; 21 Apr. 1885; leg. unknown Dry0150; det. unknown; ZMUC C-F-124217 .

Remarks

First record from Denmark. Danish thalli were immature but identifiable and in agreement with the key by Santamaria (1996c).