Corethromyces henrotii Balazuc ex Balazuc

MB#283407

Fig. 47C–D

Bulletin Mensuel de la Société Linnéenne de Lyon 42 (10): 283 (Balazuc 1973b, as henroti). –

Type: “ Sur Choleva oblonga Latreille ( Coleoptera, Leiodidae) de Mouthier-Hautepierre (Doubs), H. Henrot leg.”; PC. [France] [No. 74.34, Santamaria 2003]

Corethromyces henrotii Balazuc (Balazuc 1971c: 252) (nom. inval.) [MB#541473]

Diagnostic features

Cell I small, with the dark pigmentation of the foot sometimes extending upwards. Appendage consisting of a rather large basal cell III bearing crowded fertile and sterile branches (Fig. 47C). Fertile branches slender, including intercalary antheridia. Cell VI inflated. Perithecium showing a shaded preapical region with a dark spot on the posterior side (Fig. 47C, arrow). [Detailed descriptions: Santamaria 2003; De Kesel & Haelewaters 2019]

Distribution and hosts

Only on Choleva (Col. Leiodidae) from Belgium, Czech Republic, Finland, France, Italy, Spain, and the Netherlands (De Kesel & Haelewaters 2019).

Collections examined from Denmark

On Choleva agilis (Illiger, 1798) (Col. Leiodidae) DENMARK – Nordøstsjaelland (NEZ) • Hillerød; 55°55.714′ N, 12°18.383′ E; UC30; Oct. 1904; J.P. Johansen Dry0059; J.P. Johansen det.; ZMUC C-F-124125 .

On Choleva fagniezi Jeannel, 1922 (Col. Leiodidae) DENMARK – Østjylland (EJ) • Skaerbro Kaer; 56°4.588′ N, 9°46.314′ E; NH41; 24 Apr. 1998; V. Mahler DrY0060; V. Mahler det.; ZMUC C-F-124126 .

On Choleva jeanneli Britten, 1922 (Col. Leiodidae) DENMARK – Lolland, Falster, Møn (LFM) • Lindeskov ved Nykøbing; 54°44.747′ N, 11°53.917′ E; PF87; 14 May 1994; JP DrY0061; JP det.; ZMUC C-F-124127 . – Nordvestsjaelland (NWZ) • Yderby Lyng; 55°59.039′ N, 11°19.178′ E; PH40; 12 Apr. 2020; JP 1596; JP det.; ZMUC C-F-124356 .

On Choleva oblonga Latreille, 1807 (Col. Leiodidae) DENMARK – Østjylland (EJ) • Klostermølle; 56°2.432′ N, 9°41.629′ E; NH41; 12 Mar. 2017; JP 278; JP det.; ZMUC C-F-122757 .

Remarks

First record from Denmark. Some of the studied thalli belong to the unusual forms described by De Kesel & Haelewaters (2019), which are characterized by having a darkened cell III (Fig. 47D), a feature not considered enough important by those authors to separate them as a new species; our material is not in a good enough condition to be adequately studied, but the option of a new species should not be ruled out.