Laboulbenia littoralis De Kesel & Haelew.

MB#801461

Fig. 36E–F

Mycologia 106 (3): 409 (De Kesel & Haelewaters 2014a). –

Type: “ Holotype.– BELGIUM, WEST-VLAANDEREN: Knokke-Heist, Zwin estuary, 28 Apr. 2012, parasite on tibia of male Cafius xantholoma (Gravenhorst, 1806) ( Coleoptera, Staphylinidae, Staphylininae, Staphylinini, Philonthina), A. De Kesel 5152b (BR–MYCO 171396-94)”; BR.

Diagnostic features

Cell V trapezoidal, similar in size and shape to cell IV. Septum IV–V vertical, connected with septum III–IV. Basal cell of outer appendage swollen and similar or slightly longer than cell IV, twice as long as the basal cell of inner appendage, separated from the outer branch by a thick, black and constricted septum. Appendages not exceeding the tip of perithecium, crowded in mature thalli with a few distinctively brown antheridia (Fig. 36F, an). Dorsal side of the receptacle bent outwards at the junction of cells II and III. Perithecium with large black preostiolar spots.

Distribution and hosts

Only known from the original description (De Kesel & Haelewaters 2014a), on Cafius (Col. Staphylinidae) from Belgium, the Netherlands, France and Italy.

Collections examined from Denmark

On Cafius xantholoma (Gravenhorst, 1806) (Col. Staphylinidae Staphylininae) DENMARK – Fyn (F) • Knudshoved; 55°18.212′ N, 10°49.828′ E; PG13; 11 Nov. 2018; JP 1225; JP det.; ZMUC C-F-123752 • Sprogø; 55°20.012′ N, 10°58.263′ E; PG23; 7 Sep. 2013; JP 100; JP det.; ZMUC C-F-122575 . – Lolland, Falster, Møn (LFM) • Ulvshale; 55°2.305′ N, 12°17.042′ E; UB20; 2 May 2018; JP 1102; JP det.; ZMUC C-F-123620 . – Nordøstsjaelland (NEZ) • Liseleje; 56°1.048′ N, 11°58.454′ E; PH81; 7 Oct. 2018; JP 1203; JP det.; ZMUC C-F-123730. – Sydsjaelland (SZ) • Gammel Kalvehave; 54°59.745′ N, 12°8.232′ E; UA19; 23 Sep. 2018; JP 1177; JP det.; ZMUC C-F-123701 • Klinteby Klint; 55°11.579′ N; 11°32.489′ E; PG61; 10 Sep. 2016; JP 121; JP det.; ZMUC C-F-122598 .

Remarks

First record from Denmark. A photo of this species is given here for the first time. According to De Kesel & Haelewaters (2014a), Laboulbenia littoralis is a sister species of L. slackensis and may be distinguished from it by (1) the stouter thallus, (2) the swollen outer appendage basal cell which is equal to or taller than cell IV and twice as long as the inner appendage basal cell, and (3) the outwards bent receptacle. Laboulbenia littoralis seems to be restricted to Cafius xantholoma, whereas L. cafii occurs on species of the genus Remus . Our observations with Danish specimens agree with this statement (see under L. cafii).