Skip to main content Skip to main navigation menu Skip to site footer
Published: 2016-09-29

Idiocnemis schorri sp. nov., a new damselfly species from southern Papua New Guinea (Odonata: Platycnemididae)

Arachnida Section, Zoologisches Forschungsmuseum Alexander Koenig, Bonn, Germany
Herpetology Department, South Australian Museum, North Terrace, Adelaide, S A. 5000, Australia and Wildlife Conservation Society, Goroka, Papua New Guinea
Department of Natural Sciences, Bishop Museum, 1525 Bernice Street, Honolulu, HI 96817, USA
Odonata Zygoptera new species Hindenburg Range Muller Range Kikori River Basin Papua New Guinea


Idiocnemis schorri sp. nov. is described from the Hindenburg and Muller Ranges and the Kikori River Basin of southern Papua New Guinea. The new species differs from all congeners by, among other characters, a unique colour pattern on the thorax. Characters of males and females are illustrated and compared to those of similar species from the Idiocnemis bidentata group. The new species is found along small, shallow rainforest streams and is currently known only from the Trans-Fly Foreland and Papuan Gulf Foreland areas of endemism.



  1. Gassmann, D. (1999) Taxonomy and distribution of the inornata species-group of the Papuan genus Idiocnemis Selys (Odonata: Zygoptera: Platycnemididae). Invertebrate Taxonomy, 13, 977–1005.

    Gassmann, D. (2000) Revision of the Papuan Idiocnemis bidentata–group (Odonata, Platycnemididae). Zoologische Mededelingen, 74, 375–402.

    Gassmann, D. (2005) The phylogeny of Southeast Asian and Indo-Pacific Calicnemiinae (Odonata, Platycnemididae). Bonner Zoologische Beiträge, 53 (2004), 37–80.

    Gassmann, D. &. Richards, S.J. (2008) Description of Idiocnemis patriciae sp. nov. from Papua New Guinea (Odonata: Platycnemididae), with new distributional records of other Idiocnemis species. Zoologische Mededelingen, 82 (47), 581–593.

    Kalkman, V.J., Richards, S.J., Polhemus, D.A. (2010) Three new species of Argiolestes, with a key to the males of Argiolestes s. str. (Odonata: Megapodagrionidae). International Journal of Odonatology, 13 (1), 75–88.

    Kalkman, V.J., Theischinger, G. & Richards, S.J. (2011) Dragonflies and damselflies of the Muller Range, Papua New Guinea. In: Richards, S.J. & Gamui, B. (Eds.), Rapid biological assessments of the Nakanai Mountains and the Upper Strickland Basin: Surveying the biodiversity of Papua New Guinea’s sublime karst environments, RAP Bulletin of Biological Assessment, 60. Conservation International, Virginia, 175–181.

    Lieftinck, M.A. (1958) A review of the genus Idiocnemis Selys in the Papuan Region, with notes on some larval forms of the Platycnemididae (Odonata) (Pt. 2), Nova Guinea, new series, 9, 253–292.

    Orr, A.G. & Kalkman, V.J. (2010) Arrhenocnemis parvibullis sp. nov. (Odonata: Platycnemididae), a new calicnemiine damselfly from Papua New Guinea, with a description of the female of A. amphidactylis Lieftinck, 1949. Australian Entomologist, 37 (4), 137–146.

    Orr, A.G., Kalkman, V.J. & Richards, S.J. (2012) A review of the New Guinean genus Paramecocnemis Lieftinck (Odonata: Platycnemididae), with the description of three new species. Australian Entomologist, 39 (3), 161–177.

    Orr, A.G., Kalkman, V.J. & Richards, S.J. (2013) Four new species of Palaiargia Förster, 1903 (Odonata: Platycnemididae) from New Guinea with revised distribution records for the genus. International Journal of Odonatology, 16 (4), 309–325.

    Orr, A.G. & Richards, S.J. (2016) Three new species of Papuagrion Ris, 1913 (Odonata: Coenagrionidae) from the Hindenburg Wall region of western Papua New Guinea. Zootaxa, 4072 (3), 319–332.

    Polhemus, D.A. (1995) A preliminary biodiversity survey of aquatic Heteroptera and other aquatic insect group in the Kikori River Basin, Papua New Guinea. In: WWF (Ed.), Field survey of biodiversity in the Kikori River Basin, Papua New Guinea, World Wildlife Fund, Washington, D.C., pp. 33–47.

    Polhemus, D.A. & Allen, G.R. (2007) Freshwater biogeography of Papua. In: Marshall, A.J. & Beehler, B.M. (Eds.), Ecology of Papua, Volume 1: Periplus Editions (HK) Ltd., Singapore. pp. 137–164.

    Polhemus, D.A., Englund, R.A. & Allen, G.R. (2004) Freshwater biotas of New Guinea and nearby islands: Analysis of endemism, richness, and threats. Conservation International, Washington, D.C.

    Richards, S.J. & Theischinger, G. (2015) Chapter 5. Odonata (dragonflies and dam-selflies). In: Richards, S.J. & Whitmore, N. (Eds.), A rapid biodiversity assessment of Papua New Guinea’s Hindenburg Wall Re-gion, Wildlife Conservation Society, Goroka. 75–83.

    Theischinger, G. & Richards, S.J. (2014) Drepanosticta machadoi spec. nov. from New Guinea (Odonata: Platystictidae). Zootaxa, 3866 (1), 145–150.

    Theischinger, G. & Richards, S.J. (2015) New species of damselflies from the Hindenburg Wall region of western Papua New Guinea (Odonata: Coenagrionidae, Platycnemididae). Odonatologica, 44 (3), 431–446.

    Theischinger, G. & Richards, S.J. (2015) The genus Nososticta Hagen (Odonata: Platycnemididae) from the Papuan region with descriptions of ten new species group taxa. Odonatologica, 44 (1/2), 153–224.

    Watson, J.A.L. & O’Farrell, A.F. (1991) Odonata (Dragonflies and Damselflies). In: Naumann, I.D. (Ed.), The Insects of Australia. 2nd Ed., Vol. I., Melbourne, 294–310.