4. Labiobaetis gambiae (Gillies, 1993)

Labiobaetis gambiae: Gillies 1993: figs 30-37 ( Baetis gambiae); Edia et al. 2015

Differential diagnoses.

Nymph. Following combination of characters: A) scape without distolateral process; B) labial palp segment II with narrow, thumb-like protuberance, segment III enlarged, slightly pentagonal (Fig. 9b); C) maxillary palp segment II with slight excavation at inner, distolateral margin; D) fore femur rather slender, length ca. 4 × maximum width; dorsal margin with ca. eight curved, spine-like setae; femoral patch absent; E) hind protoptera small (Fig. 9a); F) seven pairs of gills.

Material examined.

Gambia • 4 nymphs; River Gambia, Wali Kunda; 01.10.1981; on slides; NHM10017019, NHM10017020, NHM10017022, NHM10017023; NHM • 2 nymphs; River Gambia, Wali Kunda; 07.10.1981; on slides; NHM10017021, NHM10017026; NHM • 1 nymph; River Gambia, Wali Kunda; 10.1986; on slide; NHM10017024; NHM. Ivory Coast • 1 nymph; Riv. Eholié, Akakro; 05°28'36"N, 03°08'25"W; 01.10.2003; leg. E.O. Edia; on slide; GBIFCH00592452; MZL • 26 nymphs; Riv. Noé, Loc. M'possa; 05°28'37"N, 02°51'30"W; 30.06.2004; leg. E.O. Edia; 1 on slide; GBIFCH00592731; 25 in alcohol; GBIFCH00515610; MZL • 62 nymphs; Riv. Soumié, Loc. Pont Soumie; 05 °24'53"N, 03°16'56"W; 14.06.2008; leg. J.-L. Gattolliat and E.O. Edia; 1 on slide; GBIFCH00592732; 61 in alcohol; GBIFCH00515611; MZL • 13 nymphs; Grobiakoko; 05°51'18"N, 05°31'00"W; 29.10.2006; leg. E.O. Edia; 1 on slide; GBIFCH00592736; 12 in alcohol; GBIFCH00515616; MZL • 15 nymphs; Niambré; 05°52'46"N, 05°36'55"W; 19.07.2007; leg. E.O. Edia; in alcohol; GBIFCH00515544; MZL • 16 nymphs; Boubo; 05°18'08"N, 04°22'37"W; 19.07.2007; leg. E.O. Edia; 1 on slide; GBIFCH00592737; 15 in alcohol; GBIFCH00515543; MZL • 1 nymph; Goré; 06°22'28"N, 06°34'27"W; 26.10.2006; leg. E.O. Edia; in alcohol; GBIFCH00515618; MZL. MALI • 1 nymph; River Niger, 30 km downstream Bamako, Tyenfala (= Tienfala); 05.02.1986; on slide; NHM10017025; NHM.

Distribution.

Gambia, Ivory Coast, Mali (Fig. 4b).