A brief look at the Odonata from the Páramo ecosystems in Colombia, with the descriptions of Oxyallagma colombianum sp. nov. and Rhionaeschna caligo sp. nov. (Odonata: Coenagrionidae, Aeshnidae, Libellulidae) Author Bota, Cornelio Andrés text Zootaxa 2014 3856 2 192 210 journal article 10.11646/zootaxa.3856.2.2 24c01b66-c0d2-458b-a7fe-0e3de779a8e8 1175-5326 250932 ABC0E7D7-2E22-4605-A97B-0F1E632F3930 Key to species of Oxyallagma Reference to the illustrations of O. dissidens in Garrison et al. (2010) is important in order to accurately identify these species. 1. Females............................................................................................ 2 1’. Males............................................................................................. 3 2 (1). S2 – 6 with middorsal black stripe, S9 with light blue middorsal stripe ( Fig. 4 c); cercus ivory white; middorsum of posterior lobe of pronotum strongly bent dorsally (Northern Peru , Ecuador , and Southern Colombia ).................. O. dissidens 2’. No middorsal black stripe on S2 – 6, nor light blue middorsal stripe on S9 ( Figs. 5 b, d); cercus dark brown; middorsum of pos- terior lobe of pronotum only slightly bent dorsally ( Fig. 6 a) (Northern Colombia )...................... O. colombianum 3 (1’). Genital ligula without small latero-medial pointed lobes; paraproct with swollen semicircular ventral branch as wide as cercus; cercus with two short ventroapical processes (Northern Peru , Ecuador , and Southern Colombia ).............. O. dissidens 3’. Genital ligula with small latero-medial pointed lobes ( Fig. 6 b); paraproct with ventral branch not swollen, narrower than half of cercus ( Figs. 6 c – d); cercus with one ventroapical process ( Fig. 6 d) (Northern Colombia ).............. O. colombianum