Moubayed-Breil J. 2018. Propsilocerus seezanus sp.n. a new alpine element occurring in the oligotrophic high mountain Lake Seez, South Eastern France (Diptera, Chironomidae, Orthocladiinae) // Euroasian Entomological Journal. Vol.17. No.3: 167–170 [in English].
Consultant in Freshwater & Marine biology, 10 rue des Fenouils, F-34070 Montpellier, France.
ABSTRACT. Propsilocerus seezanus sp.n. is described and diagnosed based on material composed of male adults collected in the oligotrophic high mountain Lake Seez located in the French Alps (E-France). In this paper the diagnosis of the genus Propsilocerus Kieffer (1923) is supplemented with some additional relevant characters found in the male adult. The new species is keyed near P. jacuticus (Zvereva, 1950), P. paradoxus (Lundstrom, 1915) and P. sinicus Sather et Wang, 1996, from which it can be separated by the following characters: only outer verticals present; squama of wing bare; tibial pseudospurs present on PI–PIII, hind tibial comb present, sensilla chaetica present on tibia and tarsomeres; tergite IX sub-rectangular and markedly projecting posteriorolaterally; superior and median volsella consist of 1 small lobe bearing each 1 single apical stout seta. Geographical distribution of P. seezanus sp.n. is currently restricted to the French Alps. It belongs to the community of glacial relic elements, which are considered as biogeographic indicators of global warming and climate change. Remarks, taxonomic position, and ecology of the new described species are given.
KEYWORDS: Chironomidae, Propsilocerus, new species, Lake Seez, French Alps.