Checklist of the springtails (Hexapoda: Collembola) of the Edough massif, northeastern Algeria.

Based on 225 samples taken from different biotopes in the Edough Massif (northeastern Algeria) from 1998 to 2018, we compiled a list of 91 collembolan species names from the literature, of which 72 can be considered valid records. Fourteen of them are only known from this massif in Algeria, and eight are endemic of northeastern Algeria. These 72 species are spread over 14 families and 49 genera. The family Neanuridae is the most diverse with 18 species, including six species of the genus Friesea. The monotypic genus Edoughnura (Neanurinae) is endemic to the Edough and Collo massifs. Several of the listed species do not fully match the diagnosis of the species to which they have been assigned and may represent undescribed taxa. Entomobryidae as well as several habitats (epigean, deep soil, littoral) remain unsampled or undersampled in Edough, and are likely to host many more species than those listed in this paper.

New species of Pseudachorutes (Collembola: Neanuridae) from Northeastern Algeria.

Three new species of Pseudachorutes are described from the Collo massif in northeastern Algeria, all three with morphological features unique or rare in the genus. P. deficiens sp. nov. lacks chaeta E on the labium, a character only retrieved in P. ouatilouensis Najt & Weiner, 1997 from New Caledonia, from which it differs by the presence of chaeta a2 on Th. II and of chaeta M on tibiotarsus. P. octosensillatus sp. nov. is the only species of the genus that have 8 S-chaetae on Ant IV. P. labiatus sp. nov. has 3 x-papillae on the labium, like P. cf. indiana Christiansen & Bellinger, 1980 from Alaska, from which it differs by the presence of chaeta a2 on Th. II and a lower number of vesicles in PAO (5-6 vs 10-14).

A new species of Deutonura (Collembola: Neanuridae: Neanurinae) from north-eastern Algeria, and characterisation of two intraspecific lineages by their barcodes.

A new species of Deutonura, D. zana sp. nov., is described from north-eastern Algeria. It is morphologically similar in most characters to D. deficiens meridionalis and to D. luberonensis, both members of the D. phlegraea group, differing from the former by the absence of chaeta O on head, and from the later by the separation of tubercles Di and De on Th. I. The muscular insertion pattern of the new species is figured, and suggested as a potential new character for the taxonomy of Neanurinae. Deutonura zana sp. nov. is well characterised by its barcode sequence. Within the new species as morphologically defined, two groups of COI haplotypes, in individuals indistinguishable morphologically, are reported from two distinct mountain ranges. The need of a morphological assessment of demes diverging at significant infra-specific level in their barcodes is stressed.

Cryptic diversity in the ubiquist species Parisotoma notabilis (Collembola, Isotomidae): a long-used chimeric species?

Parisotoma notabilis is the most common species of Collembola in Europe and is currently designated as ubiquist. This species has been extensively used in numerous studies and is considered as well characterized on a morphological ground. Despite the homogeneity of its morphology, the sequencing of the barcoding fragment (5' end of COI) for several populations throughout Europe and North America revealed four distinct genetic lineages. The divergence found between these lineages was similar to the genetic distance among other species of the genus Parisotoma included in the analysis. All four lineages have been confirmed by the nuclear gene 28S. This congruence between mitochondrial and nuclear signals, as well as the geographical distribution pattern of lineages observed in Europe, supports the potential specific status of these lineages. Based on specimens from the type locality (Hamburg), the species name was successfully assigned to one of these lineages. This finding raises several problems as Parisotoma notabilis has been widely used in many ecological studies. Accumulation of new data for the different lineages detected, especially ecological information and life history traits, is needed to help resolve this situation.