Les Collemboles (Hexapoda : Collembola) de quelques localités du Nord-est algérien taxonomie et appartenance biogéographique

Abstract

Dozens of samples from five localities of Northeastern Algeria are analyzed in the laboratory of Biosystematics and ecology of arthropods. A total of more than 27311 individuals were extracted following the use of common extraction springtails techniques. The taxonomic study of the species reveals the presence of a total of 49 species of Collembola Poduromorpha. Our findings have enriched the national heritage Collembola by a contribution of 9 new species for the country one of them is new to science. All the new species for the country are also new to North Africa, which shows that the North-eastern Algeria has a very different fauna from that of neighboring countries in the Mediterranean circum. The fauna which concerns by this study consists of species belonging to three super-families, 5 families, 4 subfamilies and 27 genera of the order Poduromorpha. Inside Poduromorpha, stands the family Neanuridae with 22 species belonging to 3 subfamilies known six subfamilies: Frieseinae with 6 species of the same genus (Friesea); Neanurinae with 9 species and 5 genera and finally the exception subfamily Pseudachorutinae with 7 species and 6 genera. Among the five prospected localities is the mountainous massif of Edough that comes the most of the total species collected and identified, that is to say 44 species. The most unexpected character of this fauna is the presence of endemic species hitherto distant biogeographically regions: the case of genres Kenyura and Cephalachorutes known only in African’s American’s tropics. Guelma region reveals exceptional on the map of specific diversity: in addition to the new species (Superodontella tayaensis sp.nov.). The locality also hosts Kenyura sp. Cephalachorutes and minimus. Diversity of Friesea genera (6 species) and the astonishing richness specific of Neanuridae met in the massif of Edough: 19 species against only 10 in the rest of the country. What makes it distinguish from all the Mediterranean forested mountains vaster and more intensely studied. Five new species are reported here: Superodontella tayaensis n.sp, Friesea major, Deutonura ns Edoughnura rara, Edoughnura sp2. Three had been described before this work and one is described here: Superodontella tayaensis (Arbea, Brahim Bounab & Hamra kroua 2013). Eight species are rare, which makes it possible to expect new discoveries. The affinities of the population of Collembola are primarily with the Mediterranean fauna, with original features. The fauna of Edough consists of some European elements that Guelma is rather unusual, unexpected and original. The dynamics of the settlement of Collembola endogens is determined by the seasonal variation of the fundamental factors: temperature and humidity. Their seasonal impact, clear surfaces, is felt even in the in-depth ground