Corresponding author: Thomas Kaltenbach (
Academic editor: K. Williams
Material collected between 1984 and 1988 in Guinea and Mali and between 2003 and 2008 in the Ivory Coast substantially increased our knowledge of
Kaltenbach T, Gattolliat J-L (2021)
The family
The genus
Recently, integrative taxonomy was applied on collections from the highly diverse regions of Southeast Asia and New Guinea, but also from Africa and many species were described and named (
The status of Afrotropical mayfly research was depicted by Barber-James and Gattolliat (
So far, only four species of
Map of Africa with studied countries in red: Gambia, Guinea, Mali, Ivory Coast.
The specimens were collected between 1984 and 1988 in Guinea and Mali by Jean-Marc Elouard (France) during the French ORSTOM programme for the control of onchocerciasis and between 2003 and 2008 in the Ivory Coast by Edia Oi Edia (Université Nangui Abrogoua, Abidjan, Ivory Coast), partly together with one of the authors (JLG). The nymphs were preserved in 70%–96% ethanol.
The dissection of nymphs was done in Cellosolve (2-Ethoxyethanol) with subsequent mounting on slides with Euparal liquid, using an Olympus SZX7 stereomicroscope.
The DNA of some specimens was extracted using non-destructive methods allowing subsequent morphological analysis (see
Drawings were made using an Olympus BX43 microscope. To facilitate the determination of the new species and the comparison of important structures with other species, we partly used a combination of dorsal and ventral aspects in one drawing (see
Photographs of nymphs were taken using a Canon EOS 6D camera and the Visionary Digital Passport imaging system (
Approximate GPS coordinates to the older sample locations (1984–1988) were attributed using Google Earth (
Coordinates of locations of examined specimens (
Species | Locality | GPS coordinates |
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Guinea: Boussoulé |
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Ivory Coast: Affiénou |
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Ivory Coast: Anoblékro |
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Ivory Coast: Banco |
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Ivory Coast: Goré |
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Ivory Coast: Grobiakoko |
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Ivory Coast: Pont Ehania |
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Ivory Coast: Pont Soumié |
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Guinea: Mt. Nimba |
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Ivory Coast: Banco |
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Gambia: Wali Kunda |
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Ivory Coast: Akakro |
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Ivory Coast: Boubo |
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Ivory Coast: Goré |
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Ivory Coast: Grobiakoko |
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Ivory Coast: M’possa |
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Ivory Coast: Niambré |
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Ivory Coast: Pont Soumié |
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Ivory Coast: Riv. Ehania Eh1 |
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Ivory Coast: Riv. Ehania Eh2 |
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Ivory Coast: Riv. Eholié E2 |
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Ivory Coast: Riv. Noé N2 |
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Ivory Coast: Riv. Soumié S1 |
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Mali: Tienfala |
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Ivory Coast: Loc. Aboisso |
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Ivory Coast: Pont Soumié |
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Mali: Kati-Kita |
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Mali: Missira |
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Mali: Sotuba |
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Mali: Tienfala |
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Guinea: Diani |
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Guinea: Férédougouba |
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Guinea: Kissidougou-Kankan |
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Guinea: Loffa |
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Guinea: N’Zébéla |
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Guinea: Sassambaya |
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Ivory Coast: Anoblékro |
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Ivory Coast: Grobiakoko |
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Ivory Coast: Pont Ehania |
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Mali: Loc. Kati-Kita |
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Guinea: Mt. Nimba |
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Ivory Coast: Anoblékro |
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Ivory Coast: Banco |
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Ivory Coast: Biaka |
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Mali: Tienfala |
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Ivory Coast: Akakro |
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Ivory Coast: Anoblékro |
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Ivory Coast: Banco |
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Ivory Coast: Pont Soumié |
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The terminology follows
Abbreviations:
1.
2.
3.
4.
5.
6.
7.
8.
Guinea (Fig.
Nymph morphology
Nymph morphology, fore femur
Both mandibles with lateral margins almost straight. Basal half with fine, simple setae scattered over dorsal surface.
Dedicated to the collector of the specimens, Dr. Edia Oi Edia (Université Nangui Abrogoua, Abidjan, Ivory Coast), in recognition of his contribution to the knowledge of aquatic insects from the Ivory Coast.
The specimens were collected at altitudes between sea level and 200 m, mostly together with one or several other West African species (
Ivory Coast (Fig.
Distribution of
Ivory Coast • 28 nymphs; Abidjan, Banco, Réserve Naturelle;
Guinea, Ivory Coast (Fig.
Nymph morphology
Gambia • 4 nymphs; River Gambia, Wali Kunda; 01.10.1981; on slides; NHM10017019, NHM10017020, NHM10017022, NHM10017023;
Gambia, Ivory Coast, Mali (Fig.
Guinea • 1 nymph; Guinea; Bas. Niger, Riv. Niandan, Loc. Sassambaya; 23.12.1984; Coll. ORSTOM; leg. J-M Elouard; on slide; GBIFCH00592422;
Guinea, Ivory Coast, Mali (Fig.
Guinea • 2 nymphs; Férédougouba, stat. près confluent, Beya et M’bôo (Riv.6); 09.09.1988; leg. J.-M. Elouard; 1 in alcohol; GBIFCH00515501; 1 on slide; GBIFCH00592375;
Guinea, Ivory Coast, Mali (Fig.
Guinea • 1 nymph; Bas. Cavally, Riv. Cavally, Loc. Mt. Nimba (nord-ouest); 01.02.1988; Coll. ORSTOM; leg. J.-M. Elouard; on slide; GBIFCH00592395;
Guinea, Ivory Coast, Mali (Fig.
Ivory Coast • 4 nymphs; Loc. Réserve Naturelle Banco, Abidjan, station aval;
Ivory Coast (Fig.
1 | With six pairs of gills |
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– | With seven pairs of gills |
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2 | With distolateral process at scape; labrum rectangular; mandibles with incisor and kinetodontium apically cleft; glossae much shorter than paraglossae; paraproct with two or three spines (Fig. |
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– | Without distolateral process at scape; labrum subrectangular; mandibles with incisor and kinetodontium fused; glossae somewhat shorter than paraglossae; paraproct with many spines |
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3 | Labial palp segment II with broad thumb-like, distomedial protuberance (Fig. |
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– | Labial palp segment II with narrow thumb-like, distomedial protuberance (Fig. |
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4 | Labial palp segment II narrow thumb-like (Fig. |
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– | Labial palp segment II broad thumb-like (Fig. |
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5 | Hind protoptera small (Fig. |
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– | Hind protoptera well developed (Fig. |
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6 | Scape with distolateral process (Fig. |
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– | Scape without distolateral process (Fig. |
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7 | Fore femur length 3.1–4.1× maximal width, dorsally with row of 9–12 spine-like setae (Fig. |
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– | Fore femur length 2.7–3.2× maximal width, dorsally with row of 13–18 spine-like setae (Fig. |
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For the assignment of the new species to
The morphology of
However,
In
A high number of localities and different habitats have been sampled in West Africa due to the ORSTOM activities in the past (
We sincerely thank Jean-Marc Elouard (France) and Edia Oi Edia (Université Nangui Abrogoua, Abidjan, Ivory Coast) for the collection of precious material and for making it available to the Museum of Zoology in Lausanne (