Labiobaetis boussoulius (Gillies, 1993)

Kaltenbach, Thomas & Gattolliat, Jean-Luc, 2021, Labiobaetis Novikova & Kluge in West Africa (Ephemeroptera, Baetidae), with description of a new species, African Invertebrates 62 (1), pp. 355-382 : 360

1. Labiobaetis boussoulius (Gillies, 1993)

Labiobaetis boussoulius : Gillies 1993: figs 4-12 ( Baetis boussoulius )

Differential diagnoses.

Nymph. Following combination of characters: A) scape without distolateral process; B) labial palp segment II with broad, thumb-like distomedial protuberance; C) maxillary palp segment II with strongly developed excavation at inner distolateral margin, segment II 1.8-1.9 × length of segment I (Fig. 2a ); D) fore femur mostly rather slender, length 3.1-4.1 × maximum width; dorsal margin with 9-12 spine-like setae; femoral patch well developed (Fig. 3a ); E) hind protoptera well developed; F) seven pairs of gills.

Material examined.

Holotype. Guinea • Exuviae and male imago; Milo River, Boussoule ; 13.02.1986; leg. M.T. Gillies and J.-M. Elouard; on slides; NHM10017042 , NHM10017043 ; NHM . Other material. Guinea • 4 nymphs; same data as holotype; on slides; NHM10017044 , NHM10017045 , NHM10017046 , NHM10017047 ; NHM • 7 nymphs, 3 imagos; Milo River, Boussoule ; 22.12.1984; 2 nymphs on slides; GBIFCH00592438 , GBIFCH00592763 ; 5 nymphs, 3 imagos in alcohol; GBIFCH00515625 ; MZL .

Distribution.

Guinea (Fig. 4a ).

Figures

Figure 2. Nymph morphology a Labiobaetis boussoulius, maxillary palps b-e Labiobaetis glaucus b, c maxillary palps d labial palp e base of antenna f, g Labiobaetis latus f labial palp g base of antenna h Labiobaetis vinosus, labial palp. Scale bar: 0.1 mm.

Figure 3. Nymph morphology, fore femur a Labiobaetis boussoulius b Labiobaetis glaucus c Labiobaetis latus. Scale bar: 0.1 mm.

Figure 4. Distribution of Labiobaetis in West Africa.