Laboulbenia lichtensteinii F.Picard

Santamaria, Sergi & Pedersen, Jan, 2021, Laboulbeniomycetes (Fungi, Ascomycota) of Denmark, European Journal of Taxonomy 781, pp. 1-425 : 172-173

Laboulbenia lichtensteinii F.Picard

MB#222216

Fig. 36C–D

Bulletin Scientifique de la France et de la Belgique 50: 449 ( Picard 1917; as L. lichtensteini ). –

Type: [Type lost!] “ Sur le thorax, les élytres et les pattes de Cillenus lateralis Curt. , … trouvés en juin 1915 à Roscof (Finistère) par M. Jean Lichtenstein ”. [ France]

Diagnostic features

Cell V obtriangular, similar in size and shape to cell IV. Septum IV–V vertical, connected with septum III–IV. Insertion cell forming a black horizontal furrow. Appendages get damaged early, can only be seen to be well-organised in young thalli ( Fig. 36D ). Outer appendage consisting of 3–4 simple, short branches, arising from an irregular and almost flattened basal cell; basal and dorsal margins darkened. Inner appendage consisting of 1–2 simple branches, each bearing one solitary antheridium; basal cell minute. Perithecium ovoidal, with a broadly obtuse apex filled with joining irregular black spots [Detailed description: Santamaria 1998]

Distribution and hosts

Exclusive on the Col. Carabidae Cillenus lateralis (sometimes as Bembidion in old literature), a bizarre carabid stenotopic for sheltered, usually estuarine, mudflats with fine sand or gravel on the upper middle and upper shores. Typically found under stones or deposits of Ulva and Enteromorpha on or near the strandline, but can withstand considerable periods of immersion in saltwater. It feeds largely on talitrids. It is a suboceanic southern-temperate species found on coasts from southern Denmark and the British Isles south to the Iberian Peninsula and North Africa but not in the Eastern Mediterranean ( Anderson & McFerran 2001). The fungus has been reported in France (type), Spain ( Santamaria 1993b), United Kingdom (Weir 1996), and the Netherlands ( Haelewaters et al. 2012). The record from Belgium by De Kesel (1998) is erroneous because the host was truly collected in the Netherlands according to De Kesel et al. (2020).

Collections examined from Denmark

On Cillenus lateralis Samouelle, 1819 (Col. Carabidae ) DENMARK – Fyn (F) • Sprogø ; 55°20.012′ N, 10°58.263′ E; PG23; 7 Sep. 2013; JP 101; JP det.; ZMUC C-F-122576 . – Sydjylland (SJ) • Sønderstrand på Rømø ; 55°6.373′ N, 8°29.380′ E; MG60; 14 Mar. 2020; JP 1615; JP det.; ZMUC C-F-124364 .

Remarks

First record from Denmark. Laboulbenia lichtensteinii is related to other species of the L. pedicellata - complex. The appendage is the more remarkable characteristic, similar to the appendage of L. egens ( Santamaria 1998) . It is a rare species that should only be sought where its particular host is found.

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).