Description of the final instar larva of Homeoura lindneri (Ris, 1928) and redescription of the larva of H. chelifera (Selys, 1876) (Odonata: Coenagrionidae) Author Lozano, Federico Author Muzón, Javier Author Torres, Sabrina text Zootaxa 2009 2231 47 54 journal article 10.5281/zenodo.190289 78effc7c-8853-493f-985a-1d3d96469b77 1175-5326 190289 Key to final instar larvae of most common genera of Coenagrionidae from Argentina There are 15 genera known from Argentina (von Ellenrieder 2008 ; von Ellenrieder & Muzón 2008 ; Garrison 2009 ). In the key below we exclude three of them ( Aeolagrion , Antiagrion and Tigriagrion ) because there are no descriptions of the final instar larvae for the species recorded from Argentina . 1 Anterior margin of labial palp not bilobate ................................................................................................................. 2 - Anterior margin of labial palp bilobate; bromeliad-dwelling larvae ........................................................... Leptagrion 2 Anterior margin of labial palp with teeth..................................................................................................................... 3 - Anterior margin of labial palp without teeth .................................................................................................. Telebasis 3 Caudal lamellae shorter than abdomen........................................................................................................................ 4 - Caudal lamellae longer than abdomen .................................................................................................... Acanthagrion 4 Total length of larvae excluding caudal lamellae more than 9 mm ............................................................................ 5 - Total length of larvae excluding caudal lamellae less than 6 mm ........................................................... Argentagrion 5 Premental setae present ............................................................................................................................................... 6 - Premental setae absent .......................................................................................................................................... Argia