Nigrobaetis richardi sp. nov., nymph morphology: a foreleg b seta at dorsal margin of femur c fore claw d tergum IV e gill IV f paraproct g metanotum (left side), with hind protopteron (mature nymph) h gills I, II, III, IV (top to down). Scale bars: 0.1 mm.

  Part of: Kaltenbach T, Mary N, Gattolliat J-L (2021) The Baetidae (Ephemeroptera) of the Comoros and Mayotte. African Invertebrates 62(2): 427-463.