Acompsomyces stenichni (Scheloske) I.I.Tav.

MB#105014

Fig. 46A–C

Mycologia Memoirs 9: 131 (Tavares 1985). – Basionym: Stigmatomyces stenichni Scheloske, Parasitologische Schriftenreihe 19: 149 (Scheloske 1969) [MB#339712]. –

Type: “ Auf den Elytren von Stenichnus scutellaris (Col., Scydmaenidae), den ich in Bruchwäldern bei Schwand/Nürnberg erbeutete. Deutschland. Holotypus Abb. 50”. [Germany]

Diagnostic features

Appendage consisting of around seven superposed cells, each of them bearing a solitary lateral, flaskshaped antheridium, except for the uppermost which bears a pair of antheridia. [Detailed descriptions: Weir 1994; Majewski 1994b]

Distribution and hosts

Associated with species of the genus Stenichnus Thomson, 1859 (Col. Staphylinidae Scydmaeninae) from Germany (type), Poland (Majewski 1973c), United Kingdom (Weir 1994), and France (Santamaria & Rossi 1999). The record from Mexico on an undetermined scydmaenid (Benjamin 1989) requires verification.

Collections examined from Denmark

On Stenichnus collaris (Müller & Kunze, 1822) (Col. Staphylinidae Scydmaeninae) DENMARK – Lolland, Falster, Møn (LFM) • Krenkerup; 54°46.408′ N, 11°39.955′ E; PF77; 26 Jun. 1901; F. de Tengnagel DrY0168; F. de Tengnagel det.; ZMUC C-F-124234 • Naesby Strand; 54°44.625′ N, 11°4.539′ E; PF36; 23 Feb. 2014; JP 553; JP det.; ZMUC C-F-123039 .

Remarks

First record from Denmark. The generic assignment of this species is questionable. Formerly described in the genus Stigmatomyces, Tavares (1985) suggested its transfer to the genus Acompsomyces, but Benjamin (1989) questioned this statement. The arrangement of cells in the receptacle as well as the trichogyne morphology agree with most typical species of Acompsomyces on Cryptophagidae and Lathridiidae, but characters of the appendage and perithecial apex argue with this advice. Study of more material of this apparently rare species may lead to the creation of a new genus.