Laboulbenia corylophi Scheloske

Santamaria, Sergi & Pedersen, Jan, 2021, Laboulbeniomycetes (Fungi, Ascomycota) of Denmark, European Journal of Taxonomy 781, pp. 1-425 : 141-142

Laboulbenia corylophi Scheloske

MB#332774

Fig. 28C , 106A

Parasitologische Schriftenreihe 19: 117 ( Scheloske 1969). –

Type: “ Auf Halsschild und Elytren von Corylophus cassidoides (Col., Orthoperidae ). Bruchwald bei Tennenlohe/Erlangen. Deutschland. Holotypus Abb. 23”. [ Germany]

Diagnostic features

Cell V obtriangular, slightly shorter than cell IV, not connected with cell III. Septum II–VI strongly oblique. Outer appendage unbranched, with a darkened, broadened basal cell. Inner appendage consisting of a basal cell which is shorter than the outer basal cell, bearing 1–2 short branches which, in young thalli, support solitary terminal antheridia. Thallus not exceeding the 100 µm in length; dark brown except for the hyaline cell I, cell V, and apices of appendages and perithecium. [Detailed description: Majewski 1994b]

Distribution and hosts

Described from Germany on Corylophus cassidoides (Col. Corylophidae ) and found on the same host in Poland ( Majewski 1986a), Slovakia, and Czech Republic ( Rossi et al. 2019b).

Collections examined from Denmark

On Corylophus cassidoides (Marsham, 1802) (Col. Corylophidae )

DENMARK – Bornholm (B) • Svartingedalen ved Baggeå ; 55°11.740′ N, 14 45.260′ E; VB81; 23 Jun. 2018; JP 1154; JP det.; ZMUC C-F-123678 . – Østjylland (EJ) • Lindholm Hoved i Mossø ; 56°2.772′ N, 9°42.809′ E; NH41; 18 Jan. 2015; JP & H. Liljehult 511; JP det.; ZMUC C-F-122994 • Vest for Ørnsø ved Silkeborg ; 56°9.126′ N, 9°30.588′ E; NH32; 10 Nov. 2018; JP 1233; JP det.; ZMUC C-F-123760 . – Fyn (F) • Gyldenstens inddaemmede Strand ; 55°34.447′ N, 10°7.211′ E; NG75; 2 Apr. 2014; JP 683; JP det.; ZMUC C-F-123171 . – Lolland, Falster, Møn (LFM) • Lysemose ved Maribo ; 54°46.971′ N, 11°28.959′ E; PF57; 4 Jun. 2018; JP 1137; JP det.; ZMUC C-F-123661 • Nyord ; 55°2.885′ N, 12°12.380′ E; UB20; 27 Apr. 2013; JP 838; JP det.; ZMUC C-F-123333 . – Nordøstsjaelland (NEZ) • Indelukket ved Frederiksborg Slot ; 55°56.191′ N, 12°17.861′ E; UC30; 19 Mar. 2017; JP 665; JP det.; ZMUC C-F-123154 • ibid.; 12 Apr. 2017; JP 5; JP det.; ZMUC C-F-122476 • Lyngen ved Ølstykke ; 55°47.738′ N, 12°10.253′ E; UB28; 15 May 2013; JP 871; JP det.; ZMUC C-F-12336 • Naerum ; 55°48.616′ N, 12°32.706′ E; UB48; 13 Nov. 2016; JP 128; JP det.; ZMUC C-F-122605 . – Nordvestjylland (NWJ) • Fiskbaek Å ved Fiskbaek ; 56°30.762′ N, 9°18.258′ E; NH16; 24 Nov. 2019; JP 1548; JP det.; ZMUC C-F-124309 . – Nordvestsjaelland (NWZ) • Flasken nord for Reersø ; 55°31.965′ N, 11°9.831′ E; PG35; 26 Jan. 2014; JP 599; JP det.; ZMUC C-F-123088 • Nordbredden af Skarresø ; 55°39.425′ N, 11°22.998′ E; PG47; 1 May 2013; JP 852; JP det.; ZMUC C-F-123347 • Sonnerup Skov ; 55°56.643′ N, 11°34.213′ E; PH60; 1 Apr. 2017; JP 248; JP det.; ZMUC C-F-122728 . – Sydsjaelland (SZ) • Enemaerket ved Naesbyholm ; 55°22.429′ N, 11°36.776′ E; PG63; 17 Nov. 2019; JP 1557; JP det.; ZMUC C-F-124318 • Even Bro ; 55°8.694′ N, 12°0.601′ E; UB11; 17 Feb. 2019; JP 1353; JP det.; ZMUC C-F-123892 • Tryggevaelde Å ved Varpelev ; 55°21.055′ N, 12°15.877′ E; UB23; 6 Jan. 2018; JP 1590; JP det.; ZMUC C-F-124351 .

Remarks

First record from Denmark. Because of the minute size of the host insects, around one mm long, this species may be easily overlooked, perhaps being more common than records in the literature seem to indicate.

Figures

Fig. 28. Laboulbenia spp. A. L. coneglianensis Speg. Three mature thalli. – B. L. cornuta Thaxt. Mature thallus with labelled perithecial protuberance (*). – C. L. corylophi Scheloske. Mature thallus. Scale bars: 50 µm. Photographs from slides ZMUC C-F-123599 (A), ZMUC C-F-123643 (B), ZMUC C-F- 122476 (C).

Fig. 106. Habitus of hosts with fungi. Some thalli are zoomed in, and others are encircled.A. Corylophus cassidoides with four thalli of Laboulbenia corylophi on the apex of the elytra. B. Spelobia palmata with three thalli of Stigmatomyces divergatus on the left middle coxa. Scale bars: 1 mm. (Photos: Aslak Kappel Hansen).