Labiobaetis Novikova & Kluge in West Africa (Ephemeroptera, Baetidae), with description of a new species Author Kaltenbach, Thomas https://orcid.org/0000-0001-8052-0388 Museum of Zoology, Palais de Rumine, Place Riponne 6, CH- 1005 Lausanne, Switzerland & University of Lausanne (UNIL), Department of Ecology and Evolution, CH- 1015 Lausanne, Switzerland thomas.kaltenbach@bluewin.ch Author Gattolliat, Jean-Luc https://orcid.org/0000-0001-5873-5083 Museum of Zoology, Palais de Rumine, Place Riponne 6, CH- 1005 Lausanne, Switzerland & University of Lausanne (UNIL), Department of Ecology and Evolution, CH- 1015 Lausanne, Switzerland text African Invertebrates 2021 2021-04-27 62 1 355 382 http://dx.doi.org/10.3897/afrinvertebr.62.64885 journal article http://dx.doi.org/10.3897/afrinvertebr.62.64885 2305-2562-1-355 D6289103A48D43EBB3B94C77182BCB58 F8FB1E20688F5A8B8DA77D99F21237AA 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 x length of segment I (Fig. 2a ); D) fore femur mostly rather slender, length 3.1-4.1 x 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 ). 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.