Rismethus Fleutiaux, 1947

Platia, Giuseppe & Coache, Alain, 2023, Description of a new species of Rismethus Fleutiaux, 1947 from Republic of Benin with a key to the known African species (Coleoptera, Elateridae, Agrypnini), Faunitaxys 11 (27), pp. 1-4 : 4

Key to the four African known species of Rismethus Fleutiaux, 1947

1. Third antennal article just shorter than the previous.................................................... 2

— Third antennal article notably shorter than the previous................................................. 3

2. Size larger (length 3.3-3.6 mm), pronotum long as wide, elytra longer (2.05x) compared to pronotum. Median lobe of aedeagus long as the paramera................................... riesei Platia, Biondi & Sechi, 2020 (Gabon).

— Size smaller (length 2.3-2.9 mm), pronotum wider than long, elytra shorter (1.9x) compared to pronotum. Median lobe of aedeagusslightlylongerthan paramera....................................... rainoni n. sp. ( Benin Republic).

3. Slenderer body; elytra with more or less distinct and expanded reddish maculae; median lobe of aedeagus long as the paramera...................................................... chassaini Platia & Sechi, 2021 (Malawi).

— Stouter body; elytra without reddish maculae; median lobe of aedeagus shorter than the paramera...................................................................... somalicus Chassain, 2001 (Somaly Republic).