1. Labiobaetis alahmadii Gattolliat & Al Dhafer, 2018

Labiobaetis alahmadii Gattolliat et al. 2018: figs 20-33.

Differential diagnosis.

Nymph. Following combination of characters: A) colouration: abdomen dorsally brown, with light pattern as Gattolliat et al. 2018: figs 32, 33; B) scape without distolateral process; C) labial palp segment II with thumb-like protuberance; segment III slightly pentagonal; D) maxillary palp segment II with excavation at inner distolateral margin; E) fore femur rather broad, length ca. 3 × maximum width; dorsal margin with ca. 18 curved, spine-like setae and many fine, simple setae, and basally some additional spine-like setae near margin; femoral patch reduced; F) fore tibia dorsally with a row of short, spatulate setae (Gattolliat et al. 2018: fig. 26); G) hind protoptera well developed; H) seven pairs of gills; I) paraproct with ca. 16 stout, marginal spines.

Examined material.

Ethiopia • 6 nymphs; Lower Mille River; 11°24'50"N, 40°45'38"E; 482 m; leg. W. Graf; 5 in alcohol; GenBank MW307224; GBIFCH00763724, GBIFCH00515555; 1 on slide; GenBank MW307223; GBIFCH00763723 • 1 nymph; Korkada; 08°30'03"N, 39°33'07"E; 09.12.2017; 1260 m; leg. W. Graf; Kk2; in alcohol; GenBank MW307225; GBIFCH00763718 • 1 nymph; Korkada; 08°30'03"N, 39°33'07"E; 1260 m; 09.11.2017; leg. W. Graf; Kk1; in alcohol; GenBank MW307226; GBIFCH00763719 • 1 nymph; Worer; 09°20'07"N, 40°10'20"E; 740 m; 29.01.2018; leg W. Graf; Wr1; in alcohol; GenBank MW307222; GBIFCH00763720 • 1 nymph; Lafessa; 08°23'16"N; 38°54'31"E; 1600 m; 05.11.2017; Lf1; leg. W. Graf; in alcohol; GenBank MW307227; GBIFCH00763732; all material in MZL .

Biological aspects.

The specimens were collected at altitudes between 480 m and 1600 m. Further characteristics of sampling sites are given in Englmaier et al. 2020: table 1. In Saudi Arabia, the species occurs in medium-size streams with stony substrates, preferably in relatively fast flowing water or even at the base of small waterfalls (Gattolliat et al. 2018).

Distribution.

Ethiopia (Fig. 2a), Saudi Arabia (Gattolliat et al. 2018).