The damselfly genus Mecistogaster (Odonata: Pseudostigmatidae) from the Brazilian Atlantic Forest with a description of three new species and a neotype designation for M. amalia (Burmeister, 1839) Author Soldati Lacerda, Déborah S. Author Monteiro Machado, Angelo B. text Zootaxa 2019 2019-09-10 4668 2 207 228 journal article 25488 10.11646/zootaxa.4668.2.3 49eab955-d6ae-4253-bae3-ab650f77fcfc 1175-5326 3449229 F41E013A-A2B0-4642-AED6-27777DA950B5 Mecistogaster Rambur, 1842 Preia Gistl, 1848 Goniostigma Kennedy, 1920 Haplostigma Kennedy, 1920 Xanthostigma Kennedy, 1920 Diagnosis. Large to very large Pseudostigmatidae . Wings long and narrow, stalked before nodus; pseudostigma present. RP2 vein branching from RP1 vein at less than half the distance from subnodus to tip of wing. One cell row between CuA and anal margin. Quadrangle free. Tarsal claw with a conspicuous supplementary tooth. Penis with inner fold; segment 3 forming a long whip-like flagellum. Male cercus in lateral view linear and curved medially. Male and female paraprocts vestigial; ovipositor not surpassing the distal margin of S10. Length of HW 47–70 mm , abdomen 70 140 mm .