Abstract
Laboulbeniales is an order of more than 2000 species of small ascomycete fungi which are ectoparasites of insects, millipedes and mites. They are often highly host-specific and often are also highly specific with regard to which body parts they infect. Laboulbeniales from millipedes are particularly poorly known—only 12 species have been described until now, mostly from Europe. Here, we describe the first laboulbeniaceous parasites from blaniulid millipedes: Troglomyces bilabiatus from Acipes spp., Troglomyces pusillus from Iberoiulus cavernicola Ceuca, 1967 and Troglomyces triandrus from Archiboreoiulus palidus (Brade-Birks, 1920). The generic description of Troglomyces is emended. Different types of site specificity of the three new parasites, as well as of previously described species, are explained in terms of aspects of host biology: mating behaviour and habitat. Species from epigean hosts tend to show a high degree of site specificity suggesting transfer during host copulation, whereas most species from cave hosts show no pronounced site specificity and are probably transferred via the substrate. Possible roles of host defensive secretions and parthenogenesis in relation to infection with Laboulbeniales are briefly discussed.
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Acknowledgments
Thanks to Martin Enghoff (Copenhagen) and Nesrine Akkari (ZMUC) for helping in various ways to discover the new fungus species, first in a Copenhagen backyard. Thanks to David Koon-Bong Cheung (ZMUC) for photography. Thanks to Nesrine Akkari (now NMW), Göran Andersson (NMG), Dragan Antić (Belgrade), Pablo Barranco (Almeria), Jeannine Bortels (FUSAGx), Jerôme Constant (RBINS), Peter Decker (Görlitz), Laurent Delfosse (FUSAGx), Per Djursvoll (ZMUC), Jason Dunlop (MFN), Jean-Jacques Geoffroy MNHN), José Domingo Gilgado (Alcalá), Slobodan Makarov (Belgrade), Timo Pajonen (FMNH), Graham Proudlove (MM), Hans Reip (Jena), Pavel Stoev (Sofia), Henrik Sundberg (Uppsala) and Boyan Vagalinski (Sofia) for lending specimens under their care. The specimens provided by P. Barranco derive from a study partially supported by FEADER (EEC) and Consejeria del Medio Ambiente de la Junta de Andalucia (Spain), and thanks are also due to Grupo de Investigaciones Espeleológicas de Jérez (GIEX) for collecting host millipedes for T. pusillus. We are grateful to Walter Rossi (Univ. L’Aquila, Italy) for useful comments on an advanced manuscript draft.
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Enghoff, H., Santamaria, S. Infectious intimacy and contaminated caves—three new species of ectoparasitic fungi (Ascomycota: Laboulbeniales) from blaniulid millipedes (Diplopoda: Julida) and inferences about their transmittal mechanisms. Org Divers Evol 15, 249–263 (2015). https://doi.org/10.1007/s13127-015-0208-8
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DOI: https://doi.org/10.1007/s13127-015-0208-8