Laboulbenia melanaria Thaxt.

Santamaria, Sergi & Pedersen, Jan, 2021, Laboulbeniomycetes (Fungi, Ascomycota) of Denmark, European Journal of Taxonomy 781, pp. 1-425 : 176-178

Laboulbenia melanaria Thaxt.

MB#219945

Fig. 37C–D

Proceedings of the American Academy of Arts and Sciences 35: 186 ( Thaxter 1899). –

Type: “ On Diachromus germanus Linn. , Hope Coll. No. 319, Portugal ”; FH. [type according to Thaxter 1908: 338]

Laboulbenia heroica Speg. ( Spegazzini 1914: 60) [MB#226172]

Diagnostic features

Cell V rounded in outline, broader than long, paler than surroundings, half or less of the length of cell IV, not connected with cell III. Insertion cell separated from the perithecium. Outer appendage once divided above the suprabasal cell into two elongate, up to 450 µm long, branches; dorsal margins often shaded in the basal portion. Inner appendage of immature thalli consisting of two simple branches bearing solitary terminal antheridia. Perithecium blackened, subopaque, free. [Detailed descriptions: Thaxter 1908; Majewski 1994b; Santamaria 1998]

Distribution and hosts

Mostly on Diachromus germanus (Col. Carabidae ), but also reported on other carabids belonging to the Harpalinae like Anisodactylus , Ophonus and Pseudophonus . The record on Bembidion (Hoess & Senn-Irlet 2009) require confirmation. Recorded from Europe: Italy, France, Portugal, Switzerland, Russia, Poland, Romania, former Czechoslovakia, Austria, Spain, Bulgaria ( Majewski 2008), and the Netherlands ( Haelewaters et al. 2012); Africa: Morocco ( Maire 1916a); Asia: Turkey ( Balazuc 1974c), and Korea ( Lee et al. 2011). The record from Belgium by De Kesel (1998) should be removed from this country according to De Kesel et al. (2020) because it corresponds to a sample collected in France.

Collections examined from Denmark

On Diachromus germanus (Linnaeus, 1758) (Col. Carabidae ) DENMARK – Lolland, Falster, Møn (LFM) • Nykøbing Falster ; 54°46.434′ N, 11°51.911′ E; PF87; 1865; E. Benzon Dry0058; E. Benzon det.; ZMUC C-F-124124 .

Remarks

First record from Denmark. This is a well-distinguished and widespread species but appears to be very uncommon in Denmark where the record is from a collection of 1865. Moreover, this apparent rarity is primarily due to the fact that the host ( Diachromus ) is considered extinct in Denmark and has not been found for more than 150 years.

Figures

Fig. 37. Laboulbenia spp. A–B. L. manubriolata Thaxt. Mature thalli with labelled outgrowth on basal cell of outer appendage (arrows). –C–D. L. melanaria Thaxt. Mature thalli. – E–I. L. metableti Scheloske. E–G. Mature thalli with protuberant cell VII labelled with arrows in E and G. H–I. Inner appendage in detail with two focus levels, near in H, far in I; “bc ia” is the basal cell of inner appendage, “an” is an antheridium. Scale bars: 50 µm. Photographs from slides ZMUC C-F-122604 (A–B), ZMUC C-F-124124 (C–D), ZMUC C-F-123103 (E), ZMUC C-F-123072 (F), ZMUC C-F-123384 (G), ZMUC C-F-122626 (H–I).