Baetis Leach, 1815

Gattolliat, Jean-Luc, Samraoui, Boudjema, Benhadji, Nadhira, Kechemir, Lina, Zrelli, Sonia, El Yaagoubi, Sara, El Moutaouakil, Majida El Alami & Sartori, Michel, 2023, Baetidae (Baetidae, Ephemeroptera) in the Maghreb: state of the art, key, and perspectives, ZooKeys 1139, pp. 137-163 : 137

3. Baetis Leach, 1815

Diagnosis.

1) Claw short generally with a single row of restricted number of denticles (exception B. maurus with two rows of denticles); 2) paracercus reduced or at most equal to 2/3 of the cerci; 3) presence of a villopore on the ventral margin of fore femora; 4) mouthparts normally developed.

Remarks.

Except for the presence of the villopore (which is also present in Acentrella and Labiobaetis ), the genus Baetis is mainly defined by the absence of characters. The genus encompasses three subgenera in the Maghreb. These subgenera are relatively easy to recognize and must be considered as the suitable identification level to reach. Except for a few cases, species identification is rather difficult and requires expertise.