Hydraeomyces halipli (Thaxt.) Thaxt.

Santamaria, Sergi & Pedersen, Jan, 2021, Laboulbeniomycetes (Fungi, Ascomycota) of Denmark, European Journal of Taxonomy 781, pp. 1-425 : 107-108

Hydraeomyces halipli (Thaxt.) Thaxt.

MB#148360

Fig. 21F–G

Memoirs of the American Academy of Arts and Sciences 12: 293 ( Thaxter 1896). – Basionym: Heimatomyces halipli Thaxt., Proceedings of the American Academy of Arts and Sciences 29: 32 ( Thaxter 1893) [MB#462738]. –

Type: [Not designated] [Ind. loc.] “ On Haliplus ruficollis and Cnemidotus muticus , Connecticut ”; FH. [ USA] [According to Tavares 1985, the type are the fungi from H. ruficollis ]

Hydraeomyces cnemidoti Thaxt. ( Thaxter 1908: 267) [Not registered in MycoBank]

Hydraeomyces venetus Speg. ( Spegazzini 1915b: 52) [MB#187540]

Parahydraeomyces italicus Speg. ( Spegazzini 1915b: 70) [MB#146173]

Diagnostic features

See genus description. [Detailed descriptions: Sugiyama 1973; Sugiyama & Hayama 1981; Weir 1994; Majewski 1994b; Santamaria 2003; De Kesel & Werbrouck 2008]

Distribution and hosts

On species of the aquatic beetles belonging to the genera Haliplus and Peltodytes (= Cnemidotus Illiger, 1802 ) (Col. Haliplidae ). This fungus is widely distributed in Europe: Croatia, Czech Republic, Finland, France, Germany, Italy, Poland, Russia, Spain, United Kingdom ( Majewski 2008), Hungary ( Bánhegyi 1950), Belgium ( De Kesel & Werbrouck 2008), Sweden ( Huggert 2010), Bulgaria ( Rossi et al. 2019a), Slovenia ( Rossi & Christian 2020), and the Netherlands ( Haelewaters & De Kesel 2020); Africa: Tunisia and Morocco ( Maire 1916a); America: USA ( Thaxter 1892), and Argentina ( Spegazzini 1917); Asia: China ( Thaxter 1924), Japan ( Sugiyama 1973), and Taiwan ( Sugiyama & Hayama 1981).

Collections examined from Denmark

On Haliplus apicalis Thomson, 1868 (Col. Haliplidae )

DENMARK – Lolland, Falster, Møn (LFM) • Ulvshale ; 55°3.218′ N, 12°15.801′ E; UB20; 10 Jun. 2017; JP 427; JP det.; ZMUC C-F-122912 .

On Haliplus immaculatus Gerhardt, 1877 (Col. Haliplidae )

DENMARK – Nordøstsjaelland (NEZ) • Nordhavnstippen på Københavns Nordhavn ; 55°43.091′ N, 12°37.088′ E; UB57; 29 Apr. 2018; JP 1094; JP det.; ZMUC C-F-123611 .

On Haliplus ruficollis (Degeer, 1774) (Col. Haliplidae )

DENMARK – Lolland, Falster, Møn (LFM) • Busemarke Mose ; 54°57.688′ N, 12°26.619′ E; UA39; 19 Aug. 2019; JP 1495; JP det.; ZMUC C-F-124081 • Ulvshale ; 55°2.729′ N, 12°16.354′ E; UB20; 2 May 2018; JP 1101; JP det.; ZMUC C-F-123619 . – Nordøstsjaelland (NEZ) • Heatherhill ; 56°5.240′ N, 12°8.611′ E; UC21; 22 May 2016; JP 93; JP det.; ZMUC C-F-122568 .

Remarks

First record from Denmark. The presence of this species in Denmark is not surprising according to its cosmopolitan distribution.

Figures

Fig. 21. A–B. Chitonomyces italicus Speg. A. Detail of cell IIIa and its outgrowth (arrow). B. Mature thallus. – C–D. Chitonomyces melanurus Peyr. C. Mature thallus showing perithecial enlarged lips (*). D. Young thallus with labelled cell IIIa and hooked basal cell of primary appendage (arrow). – E. Chitonomyces paradoxus (Peyr.) Thaxt. Mature thallus showing prominent perithecial lips (*). – F–G. Hydraeomyces halipli (Thaxt.) Thaxt. Mature thalli. Scale bars: 50 µm. Photographs from slides ZMUC C-F-124059 (A–B), ZMUC C-F-124062 (C), ZMUC C-F-123671 (D), ZMUC C-F-123078 (E), ZMUC C-F-122568 (F–G).