Chitonomyces melanurus Peyr.

Santamaria, Sergi & Pedersen, Jan, 2021, Laboulbeniomycetes (Fungi, Ascomycota) of Denmark, European Journal of Taxonomy 781, pp. 1-425 : 104

Chitonomyces melanurus Peyr.

MB#169599

Fig. 21C–D

Sitzungsberichte der Kaiserlichen Akademie der Wissenschaften. Wien. Mathematischnaturwissenschaftliche Classe. Abteilung 1 68: 250 ( Peyritsch 1873). – Heimatomyces melanurus (Peyr.) Saccardo ( Saccardo 1895: 448) [MB#250301]. –

Type: [Not designated] [Ind. loc.] [Type lost?!] “Diese merkwürdige Art kommt stets in Gemeinschaft der nächst folgenden auf Wasserkäfern vor. Zuerst entdeckte ich sie auf Laccophilus minutus Sturm , dann auf Laccophilus hyalinus Degeer ”. [ Austria]

Heimatomyces melanurus (Peyr.) Saccardo ( Saccardo 1895: 448) [MB#250301]

Diagnostic features

Cell IIIa blackened, supporting an elongate, dark, hooked basal cell of the primary appendage ( Fig. 21D , arrow). Perithecial apex with two enlarged or lobulate lip cells formed by the uppermost wall cells from the anterior and posterior vertical rows ( Fig. 21C , *). [Detailed descriptions: Thaxter 1896; Sugiyama & Hayama 1981; Majewski 1994b; Santamaria 2001b, 2003; De Kesel & Werbrouck 2008]

Distribution and hosts

A common species that can be found on the posterior lateral margin of the left elytron in Laccophilus (Col. Dytiscidae ) from Europe: Austria (type), Finland, France, Germany, Hungary, Italy, Poland, Spain, United Kingdom ( Santamaria et al. 1991), Belgium ( De Kesel & Werbrouck 2008), Sweden ( Huggert 2010), the Netherlands, Croatia, and Ukraine ( Haelewaters & De Kesel 2020); Africa: Algeria ( Maire 1920), Cameroon, Morocco ( Santamaria et al. 1991); Asia: China, Japan, Taiwan ( Santamaria et al. 1991), Korea ( Lee & Kim 1990), Turkey ( Rossi 2016), Cambodia ( Try et al. 2017), but not found in America and Oceania.

Collections examined from Denmark

On Laccophilus minutus (Linnaeus, 1758) (Col. Dytiscidae )

DENMARK – Bornholm (B) • Raghammer Odde ; 55°1.193′ N, 14°55.777′ E; VA99; 22 Jun. 2018; JP 1146; JP det.; ZMUC C-F-123671 . – Vestjylland (WJ) • Simmelmose ; 55°46.299′ N, 9°3.519′ E; NG08; 2 Jun. 2019; JP 1478; JP det.; ZMUC C-F-124062 .

Remarks

First record from Denmark. The finding of this species is not surprising because of 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).