Odonata from the Loa Buluh Field Station area in East Kalimantan, Indonesia

The results of a survey of the Odonata in the Loa Buluh Field Station area in Kutai Kartanegara Regency, East Kalimantan, Indonesia, conducted in 2009, are reported. The history of odonatological activity in East Kalimantan is briefly summarised and the primary types of Odonata that originate from the province are listed. Details of the locations at which the 2009 survey took place are given. Sixty-six species were recorded during the survey but because it was not possible to export specimens, so that identifications were made with a hand lens in the field, there is uncertainty over the identity of some of the taxa concerned. Nevertheless, as far as we are aware there are no previously published records of six of the species recorded during the survey (Elattoneura aurantiaca (Selys, 1886), Prodasineura dorsalis (Selys, 1860), Prodasineura verticalis (Selys, 1860), Archibasis incisura Lieftinck, 1949, Mortonagrion sp. cf aborense (Laidlaw, 1914) and Macrogomphus decemlineatus Selys, 1878) from East Kalimantan before. The need for further work on the Odonata of East Kalimantan to be conducted sooner rather than later, especially given the large changes that will occur in the province due to the planned construction of the new Indonesian capital there, is discussed briefly. Previously undocumented variation in Prodasineura tenebricosa Lieftinck, 1937 is discussed in the context of one of the species of uncertain identity found during the 2009 survey.