Laboulbenia kajanensis Huldén

Santamaria, Sergi & Pedersen, Jan, 2021, Laboulbeniomycetes (Fungi, Ascomycota) of Denmark, European Journal of Taxonomy 781, pp. 1-425 : 170

Laboulbenia kajanensis Huldén

MB#108113

Fig. 35B–C

Karstenia 23: 56 ( Huldén 1983). –

Type: “ Holotype. Slide L. Huldén 3, Collecting data of the host: Finland. Ok: Paltamo , 23.V.1949, leg. Hellman. Host. Pterostichus diligens (Sturm) ( Coleoptera, Carabidae ). The parasite was found on the left side of the prothorax”; MZH.

Diagnostic features

Cell V very narrow, shorter than cell IV, not connected with cell III. Outer appendage unbranched. Inner appendage slender and shorter than the outer, consisting of a small basal cell giving rise to 3–4 branchlets terminated with antheridia or to a single sterile branch in old thalli. Usually, the appendages appear bent in relation to the perithecial axis. Perithecium with dorsal margin straight in contrast to curved ventral margin. [Detailed description: Majewski 1994b]

Distribution and hosts

Only known from Finland, Poland ( Majewski 1994b), and Belgium ( De Kesel et al. 2020) on Pterostichus (Argutor) diligens and P. (A.) strenuus (Panzer) (Col. Carabidae ). Thalli grow on the ventral side of the left margin of prothorax.

Collections examined from Denmark

On Pterostichus diligens (Sturm, 1824) (Col. Carabidae ) DENMARK – Nordøstsjaelland (NEZ) • Tokkekøb Hegn ; 55°52.334′ N, 12°22.229′ E; UB39; 6 May 2013; JP 329; JP det.; ZMUC C-F-122807 . – Nordvestjylland (NWJ) • Syd for Stårup ; 56°34.792′ N, 9°5.958′ E; NH07; 6 Feb. 2015; JP 216; JP det.; ZMUC C-F-122697 . – Nordvestsjaelland (NWZ) • Bognaes Skov på Tuse Naes ; 55°44.966′ N, 11°45.817′ E; PG78; 10 Dec. 2013; JP 876; JP det.; ZMUC C-F-123372 . – Sydsjaelland (SZ) • Holmegårds Mose ; 55°17.685′ N, 11°47.928′ E; PG73; 31 Mar. 2019; JP 1421; JP det.; ZMUC C-F-123967 .

Remarks

First record from Denmark. A photo of this species is given here for the first time. This species seems to be restricted to grow on the left prosternum of its hosts. In this regard as well as in the peculiar positioning of appendages, this species resembles L. contorta Thaxt. ( Santamaria 1998) and L. chionophila Santam. ( Santamaria et al. 2020a) .

Figures

Fig. 35. Laboulbenia spp. A. L. inflata Thaxt. Female thallus paired with a diminutive male (arrow). – B–C. L. kajanensis Huldén. Mature thalli. – D–E. L. lecoareri (Balazuc) Huldén. D. Paired mature and young thalli. E. Mature thallus. Scale bars: 50 µm. Photographs from slides ZMUC C-F-122828 (A), ZMUC C-F-122697 (B), ZMUC C-F-123372 (C), ZMUC C-F-123475 (D–E).