Labiobaetis, Novikova & Kluge, 1987

Kaltenbach, Thomas & Gattolliat, Jean-Luc, 2021, Labiobaetis Novikova & Kluge in Ethiopia (Ephemeroptera, Baetidae), with description of a new species, African Invertebrates 62 (1), pp. 231-255 : 231

Key to the Labiobaetis species of Ethiopia (nymphs; excluding L. bellus )

1	Six pairs of gills	L. vinosus
-	Seven pairs of gills	2
2	With distolateral process at scape	3
-	Without distolateral process at scape	4
3	Maxillary palp with a strongly developed distolateral excavation (Fig. 5g, h ), femur dorsally with row of 18 to 27 spine-like setae on margin and a partial row near margin (Fig. 4a ), paraproct with 15 to 20 marginal spines (Fig. 4f )	L. excavatus sp. nov.
-	Maxillary palp with distolateral excavation, femur dorsally with a row of 13 to 18 spine-like setae on margin, paraproct with 21 to 29 marginal spines ( Lugo-Ortiz and McCafferty 1997: figs 6, 8, 13)	L. latus
4	Labial palp segment II with broad thumb-like distomedial protuberance ( Gattolliat et al. 2018: figs 24, 39)	5
-	Labial palp segment II with narrow thumb-like distomedial protuberance ( Gattolliat et al. 2018: fig. 8)	L. potamoticus
5	Body dorsally with pattern as in Gattolliat et al. 2018: fig. 32, femoral patch poorly developed, tibia dorsally with row of short, spatulate setae ( Gattolliat et al. 2018: fig. 26)	L. alahmadii
-	Body dorsally with pattern as in Gattolliat et al. 2018: fig. 47, femoral patch well developed, tibia dorsally with row of scarce, tiny, stout setae ( Gattolliat et al. 2018: fig. 40)	L. glaucus

Figures

Figure 4. Labiobaetis excavatus sp. nov., nymph morphology a foreleg b fore claw c tergum IV d gill IV e margin of gill IV f paraproct g antennal scape h metanotum. Scale bars: 0.1 mm.

Figure 5. Labiobaetis excavatus sp. nov., nymph morphology: a labrum b right mandible c right prostheca d left mandible e left prostheca f hypopharynx and superlinguae g maxilla h apex of maxillary palp (left: dorsal view, right: inner lateral view) i labium j apex of paraglossa. Scale bar: 0.1 mm.