Sphaleromyces lathrobii Thaxt.

Santamaria, Sergi & Pedersen, Jan, 2021, Laboulbeniomycetes (Fungi, Ascomycota) of Denmark, European Journal of Taxonomy 781, pp. 1-425 : 247

Sphaleromyces lathrobii Thaxt.

MB#212018

Fig. 55C–D

Proceedings of the American Academy of Arts and Sciences 29: 95 ( Thaxter 1894). –

Type: [Not designated] [Ind. loc.] “ On Lathrobium nitidulum Lee. and L. punctulatum Lee. Kittery Point , Maine ”; FH. [ USA]

Corethromyces lathrobii (Thaxt.) Thaxt. ( Thaxter 1912a: 180) [MB#433858]

Diagnostic features

Cells I and II elongate and overlapping, separated by an oblique septum. Cell III almost longer than cell II and sometimes contacting with cell I, slightly protruding dorsally below the primary septum ( Fig. 55C , arrow). Appendage consisting of several superposed cells separated by strongly diagonal septa, giving rise to short branchlets including antheridia pointing to the perithecium.[Detailed description: Majewski 1994b]

Distribution and hosts

Usually on Col. Staphylinidae Paederinae of the genus Lathrobium , but also reported on Philonthus ( Balazuc 1990) . Recorded from USA (type), Poland, United Kingdom, France, Spain ( Majewski 2008), and Sweden ( Huggert 2010).

Collections examined from Denmark

On Tetartopeus terminatus (Gravenhorst, 1802) (Col. Staphylinidae Paederinae ) DENMARK – Nordøstsjaelland (NEZ) • Sortemose ; 55°48.061′ N, 12°20.120′ E; UB38; 16 Feb. 1949; A. West Dry0119; A. West det.; ZMUC C-F-124186 .

Remarks

First record from Denmark. The Danish material consists of a single thallus, which was found among thalli of the common Rhadinomyces pallidus . As the Danish thallus is not in great condition, we include an image of a thallus from Spain ( Fig. 55D ) from material published in Santamaria (1995b), for comparison.

Figures

Fig. 55. A–B. Rossiomyces falcatus (T.Majewski) R.K.Benj. A. Mature thallus. B. Immature thallus showing labelled cells I, II, III, primary septum (a), trichogyne (tr), and spinous process from the original spore apex (sx). – C–D. Sphaleromyces lathrobii Thaxt. C. Mature thallus showing protrusion of cell III (arrow). D. Mature thallus from Spain showing labelled cells I, II and III. – E–G. Stichomyces conosomatis Thaxt. Mature thalli. Scale bars: 50 µm. Photographs from slides ZMUC C-F-122733 (A–B), ZMUC C-F-124186 (C), BCB-SS1543a (D), ZMUC C-F-122729 (E, G), ZMUC C-F-122630 (F).