Laboulbenia luxurians Peyr.

Santamaria, Sergi & Pedersen, Jan, 2021, Laboulbeniomycetes (Fungi, Ascomycota) of Denmark, European Journal of Taxonomy 781, pp. 1-425 : 175

Laboulbenia luxurians Peyr.

MB#193932

Fig. 36G–I

Sitzungsberichte der Kaiserlichen Akademie der Wissenschaften. Wien. Mathematischnaturwissenschaftliche Classe. Abteilung 1 68: 248 ( Peyritsch 1873). –

Type: [Type lost?!] “ Auf Bembidium varium Oliv. , und zwar sowohl den Flügeldecken als den Extremitäten”. [ Austria, according to Balazuc 1974c]

Laboulbenia compacta Thaxt. ( Thaxter 1892: 37) [MB#242044]

Laboulbenia confusa Thaxt. ( Thaxter 1895: 476) [MB#241977]

Laboulbenia marvinii Huldén ( Huldén 1985: 8) [MB#104412]

Diagnostic features

Thallus stocky. Cell II broad and enlarged distally. Cell III flattened, strongly oblique. Cells IV and V larger; the outer margin of cell IV longer than the outer margin of cell III. Basal cells of primary appendage flattened. The two lower septa in the outer appendage dark and constricted. Insertion cell not blackened, with the same colour as surrounding cells ( Fig. 36H , ic). [Detailed descriptions: Huldén 1985; Majewski & Sugiyama 1985; Majewski 1994b; Santamaria 1998]

Distribution and hosts

Reported on Bembidion (Col. Carabidae ), usually on members of the subgenus Notaphus . Widespread in Europe: Austria, France, Germany, Hungary, Italy, Poland, Romania, Spain, Switzerland, Russia ( Santamaria et al. 1991), Latvia ( De Kesel & Krastina De Kesel 2006), Slovakia ( Rossi & Máca 2006), the Netherlands (Haelewaters et al. 2014); Africa: Algeria ( Maire 1920); America: USA ( Thaxter 1892), Argentina ( Thaxter 1912a); and Asia: Japan (Majewski & Sugiyama 1985).

Collections examined from Denmark

On Bembidion dentellum (Thunberg, 1787) (Col. Carabidae ) DENMARK – Bornholm (B) • Skelsmyre i Rønne Plantage ; 55°4.375′ N, 14 45.096′ E; VB80; 13 Jun. 1991; V. Mahler Dry0057; V. Mahler det.; ZMUC C-F-124123 .

On Bembidion varium (Olivier, 1795) (Col. Carabidae ) DENMARK – Lolland, Falster, Møn (LFM) • Ulvshale ; 55°2.270′ N, 12°15.392′ E; UB20; 6 Jun. 2018; JP 1121; JP det.; ZMUC C-F-123642 . – Sydsjaelland (SZ) • Gammel Kalvehave ; 54°59.745′ N, 12°8.232′ E; UA19; 24 Mar. 2018; JP 1008; JP det.; ZMUC C-F-123515 • Tryggevaelde Å ved Varpelev ; 55 ° 21.055′ N, 12 ° 15.877′ E; UB23; 6 Jan. 2018; JP 1587; JP det.; ZMUC C-F-124348 .

Remarks

First record from Denmark. Often confused and sometimes synonymized with Laboulbenia pedicellata , however clearly differs from it by several features as: (1) the black spot on the upper dorsal side of cell I ( Fig. 36G–H , arrows), (2) the cell III is distinctly shorter than cell IV ( Fig. 36H ), and (3) the insertion cell is not blackened as it usually occurs in most species of Laboulbenia ( Fig. 36H , ic). In immature thalli, the typically crowded appendages appear to be leaning on the young perithecium where the trichogyne is found ( Fig. 36I ). Not all the diagnostic features reported here are present in the drawings associated with the short original description, i.e., cell III is not flattened and strongly oblique in Peyritsch (1873: fig. 10), which is the only mature thallus in which this cell is visible.

Figures

Fig. 36. Laboulbenia spp. A–B. L. leisti J.Siemaszko & Siemaszko. A. Mature thallus with lower area of appendages in detail (B) with labelled antheridia (an). – C–D. L. lichtensteinii F.Picard. C. Mature thallus. D. Upper part of an immature thallus showing the young appendage. – E–F. L. littoralis De Kesel & Haelew. E. Mature thallus. F. Antheridia (an) in detail. – G–I. L. luxurians Peyr. G–H. Mature thalli with labelled cells III, IV, insertion cell (ic), and the black spot on the upper dorsal side of cell I (arrow). I. Appendage from an immature thallus in detail. Scale bars:A–C, E, G–I = 50 µm; D, F = 25 µm. Photographs from slides ZMUC C-F-122760 (A–B), ZMUC C-F-122576 (C–D), ZMUC C-F-123730 (E–F), ZMUC C-F-123642 (G–H), ZMUC C-F-123515 (I).