Abstract
This paper deals with two mayfly species (Ephemeroptera) belonging to the family Leptophlebiidae and inhabiting a lowland dipterocarp forest in East Kalimantan (Indonesia). Isca lea sp. nov. is relatively abundant in our study site and differs from all other known species by its 7 th gill composed of two lamellae instead of one. A peculiar species previously identified as Dipterophlebiodes sp. (Leptophlebiinae) belongs to a new genus Kilariodes gen. nov. (Atalophlebiinae), characterized, among others, by the shape of the mandibles and of the labrum. Kilariodes marifae sp. nov. is extremely rare and has been found in a single stream. Both new species lack posterior wings or wing pads.References
Demoulin, G. (1954) Les Ephéméroptères Leptophlebiidae de Borneo. Bulletin et Annales de la Société Entomologique de Belgique, 90, 123–131.
Derleth, P. (2003) Benthic macroinvertebrates and logging activities: a case study in a lowland tropical forest in East Kalimantan (Indonesian Borneo). School of Architecture, Civil and Environmental Engineering, Swiss Federal Institute of Technology, Lausanne, 174 pp.
Edmunds, G. F. & Polhemus, D. A. (1990) Zoogeographical patterns among mayflies (Ephemeroptera) in the Malay Archipelago, with special reference to Celebes. In: Knight, W.J. & Holloway, J.D. (Eds), Insects and the rain forests of South East Asia (Wallacea), The Royal Entomological Society of London, London, pp. 49–56.
Grant, P. M. & Peters, W. L. (1993) Description of four new genera of Thraulus group mayflies from the Eastern hemisphere and redescription of Simothraulus and Chiusanophlebia (Ephemeroptera: Leptophlebiidae: Atalophlebiinae). Transactions of the American Entomological Society, 119, 131–168.
Jacobus, L. M. & Sartori, M. (2004) Review of the genus Hyrtanella (Ephemeroptera: Ephemerellidae). Zootaxa, 785, 1–12.
Kluge, N. J. (1994) Habrophlebiinae subfam. n. with description of a new species of Habroleptoides from the Caucasus (Ephemeroptera : Leptophlebiidae). Zoosystematica Rossica, 3, 35–43.
Nguyen, V. V. & Bae, Y. J. (2003) The mayfly family Leptophlebiidae (Ephemeroptera) from Vietnam. Insecta Koreana, 20, 453–466.
Peters, W. L. (1972) The nymph of Dipterophlebiodes sp. (Leptophlebiidae: Ephemeroptera). Entomological News, 83, 53–56.
Peters, W. L. & Edmunds, G. F. (1970) Revision of the generic classification of the Eastern hemisphere Leptophlebiidae (Ephemeroptera). Pacific Insects, 12, 157–240.
Sartori, M., Derleth, P. & Gattolliat, J. L. (2003) New data about the mayflies (Ephemeroptera) from Borneo. In: Gaino, E. (Ed.), Research Update on Ephemeroptera and Plecoptera, University of Perugia, Italy, Perugia, pp. 403–406.
Sartori, M., Derleth, P. & Webb, J. M. (2007) The nymph of Atopopus tarsalis Eaton, 1881 (Ephemeroptera, Heptageniidae): first description, ecology and behaviour. Zootaxa, 1586, 25–32.
Sartori, M. & Gattolliat, J. L. (2003) First record and new species of the genus Prosopistoma Latreille, 1833 (Ephemeroptera, Prosopistomatidae) from Borneo (East Kalimantan, Indonesia). Mitteilungen der Schweizerischen Entomologischen Gesellschaft, 76, 301–305.
Sartori, M., Peters, J. G. & Hubbard, M. D. (2008) A revision of Oriental Teloganodidae (Insecta, Ephemeroptera, Ephemerelloidea). Zootaxa, 1957, 1–51.
Ulmer, G. (1939) Eintagsfliegen (Ephemeropteren) von den Sunda-Inseln. Archiv für Hydrobiologie, 16, 443–692.