Hydrophilomyces coneglianensis Speg.

Santamaria, Sergi & Pedersen, Jan, 2021, Laboulbeniomycetes (Fungi, Ascomycota) of Denmark, European Journal of Taxonomy 781, pp. 1-425 : 48-49

Hydrophilomyces coneglianensis Speg.

MB#195358

Fig. 7A–B

Anales del Museo Nacional de Historia Natural de Buenos Aires 27: 53 ( Spegazzini 1915b). – Misgomyces coneglianensis (Speg.) Thaxt. ( Thaxter 1931: 296) [MB#261637]. –

Type: “ Sobre el pecho entre las patas de los Laccobius sinuatus pescados en los alrededores de Conegliano , Veneto, en los veranos 1913 y 1914”; LPS. [ Italy]

Hydrophilomyces elegans Speg. ( Spegazzini 1915b: 54) [MB#224576]. – Misgomyces elegans (Speg.) Thaxt. ( Thaxter 1931: 297) [MB#263859]

Diagnostic features

Thallus dimorphic depending on the host sex. Receptacle consisting of 9–11 superposed cells, strongly arcuate in female hosts ( Fig. 7A ) straight in males ( Fig. 7B ). Perithecium symmetrical and straight in female hosts ( Fig. 7A ), asymmetric and with a strongly arcuate neck in males ( Fig. 7B ). [Detailed descriptions: Scheloske 1976; Majewski 1994b; Santamaria 2003]

Distribution and hosts

Occurs on beetles of the genus Laccobius (Col. Hydrophilidae ) in Spain, Germany, Italy (type), Poland, Greece ( Majewski 2008) and Hungary ( Bánhegyi et al. 1985).

Collections examined from Denmark

On Laccobius minutus (Linnaeus, 1758) (Col. Hydrophilidae )

DENMARK – Nordøstsjaelland (NEZ) • Karlstrup Kalkbrud syd for Karlstrup ; 55°32.863′ N, 12°12.385′ E; UB25; 28 May 2016; JP 228; JP det.; ZMUC C-F-122709 . – Sydsjaelland (SZ) • Bårse ; 55°7.680′ N, 11°56.494′ E; PG81; 24 Aug. 2019; JP 1501; JP det.; ZMUC C-F-124088 .

Remarks

First record from Denmark. Dimorphism related to sex host in this species was experimentally demonstrated by Scheloske (1976) who kept living insects and observed their mating behaviour.

Figures

Fig. 7. Hydrophilomyces spp., mature thalli. A–B. H. coneglianensis Speg. Thallus from female (A) and from male hosts (B). – C. H. digitatus F.Picard. – D–E. H. gracilis T.Majewski. – F–G. H. hamatus T.Majewski. Abbreviations: acc = accessory cell; bf = buffer cells. Scale bars: 50 µm. Photographs from slides ZMUC C-F-122709 (A), ZMUC C-F-124088 (B), ZMUC C-F-124274 (C), ZMUC C-F-124043 (D–F), and ZMUC C-F-124042 (G).