Genus Dimeromyces Thaxt.

MB#1583

Memoirs of the American Academy of Arts and Sciences 12: 267 (Thaxter 1896).

– Type species: D. africanus Thaxt.

Eudimeromyces Thaxt., Proceedings of the American Academy of Arts and Sciences 54: 215 (Thaxter 1918b) [MB#1923]

Jeanneliomyces Lepesme, Mémoires du Muséum d’Histoire Naturelle 19(1): 149 (Lepesme 1945) [MB#22460]

Brief description

Dioecious. Male thalli consisting of a receptacle with a few to many cells, compound antheridia and an unbranched primary appendage. Female thalli consisting of a vertical or horizontal row of cells, some of them giving rise to sterile secondary appendages, perithecia, and an unbranched primary appendage. Perithecium with an undetermined number of cells in each vertical row of outer wall cells, only the 2–3 upper cells being visible at the maturity. As perithecia mature, wall cells of stalk and basal cells degrade and vanish.

Remarks

This is one of the largest genera among Laboulbeniales consisting of 115 species (including the 112 mentioned by Reboleira et al. 2018, the two new species in Dogonniuck et al. 2019, and the new species described here), of which 13 in Europe, two in Denmark. The most recently described species are D. capensis and D. streblidarum (Dogonniuck et al. 2019) . Species of Dimeromyces are known from very diverse host groups, viz., Acarina, Isoptera, Orthoptera, Dermaptera, Thysanoptera, Coleoptera and Diptera . In spite of its cosmopolitan distribution, the major diversity of species is in tropical regions.

Key to the Danish species

1. Apical cell of primary appendage sharp-pointed. On Longitarsus Latreille, 1829 (Col. Chrysomelidae)..................................................................................... D. oculatus Santam. sp. nov.

– Apical cell of primary appendage obtuse. On Necrobia Olivier, 1795 (Col. Cleridae)....................... ............................................................................................................................. D. corynetis Thaxt.