Classis V. Odonata Author Fabricius, J. C. text Supplementum Entomologiae systematicae 1798 1798-12-31 5 283 287 journal article 24914 10.5281/zenodo.3532983 c1589979-f5b3-453f-909c-042efaea6990 3532983 AGRION . Labium trifidum: laciniis exterioribus bifidis. Antennae tenuissimae, filiformes.