4. Labiobaetis glaucus (Agnew, 1961)

Labiobaetis glaucus: Agnew 1961 ( Baetis glaucus); Lugo-Ortiz and McCafferty 1997: figs 27-38, 39-50 ( Labiobaetis masai, L. nadineae; formal synonyms, Lugo-Ortiz et al. 2000); Lugo-Ortiz et al. 2000: figs 1-11 ( Pseudocloeon glaucum); Gattolliat et al. 2018: figs 34-44, 47.

Diagnosis.

Nymph. Following combination of characters: A) labrum on dorsal surface with submarginal arc of feathered setae; B) labial palp segment II with broad thumb-like protuberance; C) maxillary palp segment II with excavation at inner distolateral margin; D) fore femur rather broad, length 3 × maximum width; dorsal margin with 13-18 curved, spine-like setae and often basally some additional setae near margin; femoral patch well developed; E) hind protoptera well developed; F) seven pairs of gills.

Distribution

(Fig. 9). Angola, Comoros, Ethiopia, Guinea, potentially Iran, Ivory Coast, Kenya, Lesotho, Mali, Mayotte, Namibia, Saudi Arabia, South Africa, Zimbabwe (Kaltenbach and Gattolliat 2021 and citations therein).

Biological aspects.

In the Comoros, the specimens were collected at an altitude of approximately 200 m, together with L. vinosus and N. richardi sp. nov. The characteristics and environmental conditions of the sampling sites in the Comoros (Anjouan, Riv. Tatinga, Riv. Ouani) are described in Starmühlner (1979: pp. 654, 655): river width 4-10 m, depth 5-30 cm, water temperature ca. 25 °C, bottom substrata consisted of basaltic boulder, gravel and muddy sand. In Mayotte, the specimens were collected at altitudes from sea level to 80 m, partly together with A. bicorne, C. smaeleni, D. mayottensis sp. nov. and P. cylindroculum .

Material examined.

Comoros • 9 nymphs; Anjouan, Riv. Tatinga, lower course by the bridge; 210 m; 22.03.1974; leg. F. Starmühlner; 1 on slide; GBFCH00592742; 8 in alcohol; GBIFCH00515668, GBIFCH00515670; MZL, FAMU • 163 nymphs; Anjouan, Ouani Riv., upper course by a tributary; 250 m; 08.03.1974; leg. F. Starmühlner; 2 on slides; GBIFCH00592743, GBIFCH00592744; 161 in alcohol; GBIFCH00515666, GBIFCH00515667, GBIFCH00515669; MZL, FAMU . Mayotte • 51 nymphs; Riv. Ouroveni; 12°47'47"S, 45°08'22"E; 80 m; 30.08.2013; leg. N. Mary; in alcohol; GenBank MH070318, GBIFCH00515530, GBIFCH00515688; MZL, FAMU • 30 nymphs, Riv. Ouroveni; 12°47'47"S, 45°08'22"E; 80 m; 19.05.2006; leg. N. Mary; in alcohol; GBIFCH00515689; MZL, FAMU • 1 nymph; Mayotte; Coconi; 29.08.2013; leg. N. Mary; 1 in alcohol; GenBank MH105069; GBIFCH00515531; MZL • 37 nymphs; Bas. Riv. Coconi, Loc. Coconi aval cascade; 12°50'05"S, 45°07'41"E; 17.04.2009; leg. N. Mary; in alcohol; GBIFCH00515712, GBIFCH00515714; MZL • 41 nymphs; Riv. Longoni, Loc. Longoni aval; 12°44'20"S, 45°09'53"E; 30 m; 16.04.2009; leg. N. Mary; in alcohol; GBIFCH00515711, GBIFCH00515713; MZL • 18 nymphs; Riv. Koualé, Loc. Legion; 12°47'49"S, 45°11'08"E; 50 m; 21.04.2009; leg. N. Mary; in alcohol; GBIFCH00515710; MZL • 50 nymphs; Riv. Koualé, Loc. Kouale aval; 12°48'20"S, 45°11'54"E; 10 m; 17.05.2006; leg. N. Mary; in alcohol; GBIFCH00515691; MZL • 7 nymphs; Riv. M'Tsangachehi; 12°53'04"S, 45°07'55"E; 10 m; 16.05.2006; leg. N. Mary; in alcohol; GBIFCH00515693; MZL • 70 nymphs; Bas. Coconi, Riv. Coconi, Barakani; 12°50'06"S, 45°07'44"E; 19.05.2006; leg. N. Mary; in alcohol; GBIFCH00515692; MZL • 1 nymph; Bas. Riv. Bouyouni, Loc. Bouyouni intermediaire; 12°44'55"S, 45°08'36"E; 40 m; 15.05.2006; leg. N. Mary; in alcohol; GBIFCH00515690; MZL • 4 nymphs; Bas. Chirini, Riv. Chirini, Soulou; 12°46'40"S, 45°06'15"E; 16.05.2006; leg. N. Mary; in alcohol; GBIFCH00515687; MZL • 20 nymphs; Riv. Dembéni, Loc. Dembeni aval; 12°50'31"S, 45°10'22"E; 10 m; 19.04.2009; leg. N. Mary; in alcohol; GBIFCH00515716; MZL • 15 nymphs; Bas. Riv. Gouloué, Loc. Gouloue captage; 12°47'27"S, 45°11'22"E; 110 m; 15.04.2009; leg. N. Mary; in alcohol; GBIFCH00515715; MZL .