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Type: Article
Published: 2024-01-24
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The imaginal morphology of the species Kangella brocha (Kang and Yang, 1995) from southern China (Ephemeroptera: Ephemerellidae)

College of Life Sciences, Nanjing Normal University, Nanjing 210023, China
College of Life Sciences, Nanjing Normal University, Nanjing 210023, China
College of Life Sciences, Nanjing Normal University, Nanjing 210023, China
imago distribution evolution mayfly china


Kangella brocha (Kang & Yang, 1995), a mayfly species known on nymphs only, has been previously placed in three different genera. Here, their first-found adults and additional nymphs from southern China reveal some new characteristics. Apart from its elongated mouthparts, extended outer incisors, widened prothorax, and shortened caudal filaments in the nymph stage, the adult exhibits a robust thorax, straight forceps, and large penes with dorsal projections. These distinct features, observed in both immature and alate stages, provide compelling evidence that this species deserves an independent genus. Therefore, the genus Kangella Sartori, 2004 is reinstated, and this species is reclassified under it. Functionally, the outstanding outer incisor likely serves purposes such as digging or capturing prey. Our finding not only narrows the distribution gap between two populations of this species but also enriches the diversity of ephemerellids in terms of ecological adaptations.


  1. Bae Y. J. & McCafferty W.P. 1991. Phylogenetic systematics of the Potamanthidae (Ephemeroptera). Transactions of the American Entomological Society 117(3–4): 1–145.
  2. Bauernfeind E. & Soldán T. 2012. The Mayflies of Europe (Ephemeroptera). Apollo Books and Ollerup, Denmark, 478 pp.
  3. Boonsoong B. 2022. Mayfly Larvae (Ephemeroptera) in Thailand. Pre-One Limited Company, Bangkok, 469 pp.
  4. Ding M. Q. & Zhou C. F. 2023. Detailed comparison of two close Chinese species, Teloganopsis punctisetae (Matsumura, 1931) and T. jinghongensis (Xu, You and Hsu, 1984) (Ephemeroptera: Ephemerellidae). Oriental Insects. Available from:
  5. Eaton A. E. 1871. A monograph on the Ephemeridae. Transaction of the Entomological Society of London 1871: 1–164.
  6. Edmunds G. F. & McCafferty W. P. 1996. New field observations on burrowing in Ephemeroptera from around the world. Entomological News 107(2): 68–76.
  7. Edmunds G. F. 1959. Subgeneric groups within the mayfly genus Ephemerella (Ephemeroptera: Ephemerellidae). Annals of the Entomological Society of America 52(5): 543–547.
  8. Jacobus L. M., McCafferty W. P. & Sites R. W. 2005. Significant range extensions for Kangella and Vietnamella (Ephemeroptera: Ephemerellidae, Vietnamellidae). Entomological News 116: 268–270.
  9. Jacobus L. M. & McCafferty W. P. 2008. Revision of Ephemerellidae genera (Ephemeroptera). Transaction of the Entomological Society of London 134(1): 185–274.[185:ROEGE]2.0.CO;2
  10. Kang S. C. & Yang C. T. 1995. Ephemerellidae of Taiwan (Insecta, Ephemeroptera). Bulletin of National Museum of Natural Science 5: 95–116.
  11. Kluge N. J. 2004. The phylogenetic System of Ephemeroptera. Kluwer Academic Publishers, Amsterdam, 456 pp.
  12. Latreille P. A. 1833. Description d’un nouveau génre de crustacés. Nouvelles Annales du Muséum d’Historie naturelle 2: 23–34.
  13. McDunnough J. 1926. New Canadian Ephemeridae with notes. IV. The Canadian Entomologist 58(12): 296–303.
  14. Monné M. A. & Martins U. R. 1973. Notas e descrições em Eburiini (Coleoptera, Cerambycidae). Papéis Avul Zool 27: 145–155.
  15. Needham J. G. 1905. Ephemeridae. Bulletin of the New York State Museum 86 (Entomology 23) 343: 17–62.
  16. Needham J. G. 1927. A baetine mayfly nymph with tusked mandibles. Canadian Entomologist 59: 44–47.
  17. Needham J. G., Traver J. R. & Hsu Y. C. 1935. The biology of mayflies, with a systematic account North American species.The Comstock Publishing 16, xvi+759p.
  18. Ogden T. H., Osborne J. T., Jacobus L. M. & Whiting M. F. 2009. Combined molecular and morphological phylogeny of Ephemerellinae (Ephemerellidae: Ephemeroptera), with remarks about classification. Zootaxa 1991: 28–42.
  19. Qiang X. H. & Zhou C. F. 2023. A preliminary review of Isonychia Eaton, 1871 from Chinese mainland with a re-description of I. kiangsinensis Hsu, 1936 (Insecta, Ephemeroptera, Isonychiidae). ZooKeys 1178: 115–141.
  20. Sartori M. 2004. Kangella nom. nov. (Ephemeroptera, Ephemerellidae), Replacement Name pro Eburella Kang & Yang, 1995 nec Monné & Martins, 1973 (Coleoptera, Cerambycidae). Aquatic Insects 26:75–76.
  21. Shieh S. H., Hsu C. B., Wang C. P. & Yang P. S. 2007. Leaf breakdown in a subtropical stream riffle and its association with macroinvertebrates. Zoological Studies 46(5): 609–621.
  22. Soldán T. & Yang J. T. 2003. Mayflies (Ephemeroptera) of Taiwan: Species composition, taxonomic shift, distribution and biogeographical analysis, pp. 413–420. In: Research Update on Ephemeroptera & Plecoptera. (E. Gaino editor). Perugia, University of Perugia.
  23. Ubero-Pascal N. & Sartori M. 2009. Phylogeny of the genus Teloganopsis Ulmer, 1939 with a redescription of Teloganopsis media Ulmer, 1939 and the description of a new Oriental species (Ephemeroptera: Ephemerellidae. Aquatic Insects 31(Supplement 1): 101–124.
  24. Ulmer G. 1939. Eintagsfliegen (Ephemeropteren) von den Sunda-Inseln. Archiv für Hydrobiologie Supplement 16: 443–692.
  25. Zhang W., Ma Z. X., Hu Z., Luo J. Y. & Zhou CF. 2017. A new species of the genus Teloganopsis with setaceous mouthparts and forelegs from southern China (Ephemeroptera, Ephemerellidae). ZooKeys 714: 33–46.
  26. Zhou C. F. 2016. SEM and Digital Morphology of Siphluriscus chinensis Ulmer (Ephemeroptera: Siphluriscidae). Biology of Inland Waters Suppl. 3: 157–168.
  27. Zhou C. F. & Peters J. G. 2003. The nymph of Siphluriscus chinensis and additional imaginal description: a living mayfly with Jurassic origin (Siphluriscidae new family: Ephemeroptera). Florida Entomologist 86: 345–352.[0345:TNOSCA]2.0.CO;2