Abstract
The species originally described as Cheleocloeon sigiensis Gillies 2001 is moved to the genus Susua Lugo-Ortiz & McCafferty 1998. Additional descriptions of Susua sigiensis (Gillies 2001) are given based on male and female imagoes reared from larvae from several localities in Tanzania (including the type locality in the Upper Sigi Basin). Susua niandanensis (Wuillot in Wuillot & Gillies 1993) is redescribed based on larvae and male imagoes from Guinea, Mali, Côte d'Ivoire and Zambia. The genus Susua belongs to the plesiomorphon Protopatellata Kluge & Novikova 2011 and has an Afrotropical distribution; Susua is closely related to Crassabwa Lugo-Ortiz & McCafferty 1996. General characteristics of Susua are given based on the two known species.References
Eaton, A.E. (1869) On Centroptilum, a new genus of the Ephemeridae. Entomologist's Monthly Magazine, 6, 131–132.
Day, W.C. (1955) New genera of mayflies from California (Ephemeroptera). Pan-Pacific Entomologist, 31, 121–137.
Gillies, M.T. (1990) A revision of the African species of Centroptilum Eaton (Baetidae, Ephemeroptera). Aquatic Insects, 12 (2), 97–128.
https://doi.org/10.1080/01650429009361395Gillies, M.T. (1999) The mayflies of the Upper River Sigi, north-east Tanzania. Freshwater Forum, 10, 49–57.
Gillies, M.T. (2001) New species of Baetidae (Ephemeroptera) from the Upper River Sigi, Usambara, Tanzania. Journal of Natural History, 35, 23–32.
https://doi.org/10.1080/002229301447862Kaltenbach, T. & Gattolliat, J.-L. (2017) New species of Indocloeon Müller-Liebenau from South-East Asia (Ephemeroptera, Baetidae). ZooKeys, 723, 43–60.
https://doi.org/10.3897/zookeys.723.20578Kluge, N.J. (1997) Classification and phylogeny of the Baetidae (Ephemeroptera) with description of the new species from the Upper Cretaceous resins of Taimyr. In: Landolt, P. & Sartori, M. (Eds.), Ephemeroptera & Plecoptera. Biology-Ecology-Systematics. Mauron+ Tinguely & Lacht SA, Fribourg, pp. 527–535.
Kluge, N.J. (2012) Systematics of Rhithrocloeoninae with new species from Uganda. Russian Entomological Journal, 21 (1), 1–13.
Kluge, N.J. (2016) Redescription of the genus Cheleocloeon Wuillot & Gillies 1993 (Ephemeroptera: Baetidae) with descriptions of three new species from Zambia and Uganda. Zootaxa, 4067 (2), 135–167.
https://doi.org/10.11646/zootaxa.4067.2.2Kluge, N.J., Gattolliat, J.-L. & Salles, F.F. (2017) Redescription of the Afrotropical genus Crassabwa Lugo-Ortiz & McCafferty 1996 (Ephemeroptera: Baetidae: Protopatellata). Zootaxa, 4350 (3), 401–435.
https://doi.org/10.11646/zootaxa.4350.3.1Kluge, N.J. & Novikova, E.A. (1992) [Revision of the Palaearctic genera and subgenera of mayflies of the subfamily Cloeoninae (Ephemeroptera, Baetidae) with description of new species from the USSR]. Entomologicheskoe Obozrenie, 71 (1), 60–83. [in Russian]
Kluge, N.J. & Novikova, E.A. (2011) Systematics of the mayfly taxon Acentrella (Ephemeroptera, Baetidae), with description of new Asian and African species. Russian Entomological Journal, 20 (1), 1–56.
Lugo-Ortiz, C.R. & McCafferty, W.P. (1996a) The composition of Dabulamanzia, a new genus of Afrotropical Baetidae (Ephemeroptera), with descriptions of two new species. Bulletin de la Société d'Histoire Naturelle de Toulouse, 132 (1), 7–13.
Lugo-Ortiz, C.R. & McCafferty, W.P. (1996b) Crassabwa. A new genus of small minnow mayflies (Ephemeroptera, Baetidae) from Africa. Annales de Limnologie (International Journal of Limnology), 32 (4), 235–240.
https://doi.org/10.1051/limn/1996022Lugo-Ortiz, C.R. & McCafferty, W.P. (1996c) The Bugilliesia complex of African Baetidae (Ephemeroptera). Transactions of the American Entomological Society, 122 (4), 175–197.
Lugo-Ortiz, C.R. & McCafferty, W.P. (1997) Contribution to the systematics of the genus Cheleocloeon (Ephemeroptera: Baetidae). Entomological News, 108 (4), 283–289.
Lugo-Ortiz, C.R. & McCafferty, W.P. (1998) The Centroptiloides complex of Afrotropical small minnow mayflies (Ephemeroptera: Baetidae). Annals of the Entomological Society of America, 91 (1), 1–26.
https://doi.org/10.1093/aesa/91.1.1Lugo-Ortiz, C.R. & McCafferty, W.P. (1999) Delouardus, a new Centroptiloides complex genus from Madagascar and its relationship with Cheleocloeon Wuillot & Gillies (Ephemeroptera: Baetidae). African Entomology, 7 (1), 63–66.
Müller, O.F. (1776) Zoologiae Danicae Prodromus. typis Hallageriis, Havniae, 282 pp. [pp. 142–143]
Salles, F.F., Gattolliat, J.-L. & Sartori, M. (2016) Phylogenetic analyses of Cloeodes Traver and related genera (Ephemeroptera: Baetidae). Systematic Entomology, 41 (1), 93–111.
https://doi.org/10.1111/syen.12144Wuillot, J. & Gillies, M.T. (1993a) Cheleocloeon, a new genus of Baetidae (Ephemeroptera) from West Africa. Revue d'Hydrobiologie Tropicale, 26 (3), 213–217.
Wuillot, J. & Gillies, M.T. (1993b) New species of Afroptilum (Baetidae, Ephemeroptera) from West Africa. Revue d'Hydrobiologie Tropicale, 26 (4), 269–277.