Another new species of the genus Eaton, 1881 (Ephemeroptera, Leptophlebiidae) from the Maghreb.

A new species belonging to the genus Eaton, 1881 is described at the nymphal stage from the Rif Mountains of Morocco. This species presents unique features, such as the chorionic arrangement of the egg and the ornamentation of the posterior margin of abdominal tergites. It is compared to all west European species and a table with discriminating characters is given.

A new species of the group (Ephemeroptera, Baetidae) from Morocco.

is the first representative of the group to be described from the Maghreb. It was collected from streams in the Rif region of northern Morocco. All species of the group are morphologically very similar, with slight differences in colour.

A new species of the genus Waltz & McCafferty, 1994 (Ephemeroptera, Baetidae) from the north of Morocco.

A new species of is described from northern of Morocco It can be separated from the other west Palearctic species by the gill number, the spination of the distal margin of tergites, the leg setation, and the paraproct shape and spination. This species is widespread in the study area but never abundant. It prefers small to medium streams with slow flow, and does not seem to be very sensitive to pollution and water logging activities.

Assessment of functional feeding groups (FFG) structure of aquatic insects in North- western Rif - Morocco.

The involvement of trait-based approaches is crucial for understanding spatial patterns, energy flow and matter transfer in running water systems, which requires consistent knowledge of the functional structures of aquatic communities, with the advantage of combining physical properties and behavioral mechanisms of food acquisition rather than the taxonomic group. The present study indicated how functional feeding groups may be used as a proxy for classical taxonomic evaluation, as well as the potential interest in incorporating them as indicators of anthropogenic stressors. The composition and abundance of the functional feeding groups of aquatic insects were examined from September 2021 to August 2022 along the Western Rif Region.

Two new species of Eaton, 1869 from North Africa (Ephemeroptera, Baetidae).

Based on recently collected larvae from Algeria and Morocco, the species delimitation within the genus Eaton, 1869 in that region is validated. Two new species are described and illustrated, one from north-eastern Algeria, and one from North Morocco, using an integrated approach with morphological and molecular evidence. A table summarising the morphological differences between the new species and (Müller, 1776) from Central Europe is provided.

Baetidae (Baetidae, Ephemeroptera) in the Maghreb: state of the art, key, and perspectives.

Among mayflies, Baetidae are often considered as easy to recognise at the family level, but difficult to identify at lower level. In several faunistic or ecological studies, the identification remains at the family level; Baetidae are generally considered as widespread and ubiquitous, therefore as poorly informative for ecological studies or bioassessments. Here, a straightforward identification key is offered to larvae of the ten genera of Baetidae reported from Maghreb based on easily observable and understandable characters.