Revalidation of Platystigma Kennedy, 1920, with a synopsis of the quadratum species group and the description of three new species (Odonata: Pseudostigmatidae) Machado, Angelo B. M. Soldati Lacerda, Déborah S. Zootaxa 2017 4242 3 493 516 [374,516,282,308] Magnoliopsida Papaveraceae Platystigma Animalia Ranunculales 4 497 Tracheophyta genus    1 Hw with black or dark brown band. Species known only from Colombia, Peru and Venezuela...............  jocastegroup  - Hw without black or dark brown band. Species of Northern and Southeastern Brazil, Bolivia, Ecuador and Peru ( Figs. 27, 35)...................................................................................  quadratumgroup... 2   2 Posterior prothoracic lobe with lateral and median portions clearly separated by deep incision ( Fig. 12)..........  P. pronoti  - Posterior prothoracic lobe with lateral and median portions not clearly separated ( Fig. 9)........................... 3   3 Ventral border of lateral valve of ovipositor with a row of well-developed teeth increasing in size distad ( Fig. 65)..... P. sp.  - Ventral border of lateral valve of ovipositor with a row of very small denticles of equal sizes.......................... 4   4 Row of denticles originating directly from ventral border of lateral valve of ovipositor ( Fig. 63)...............  P. astictum  - Row of denticles originating from small, narrow, sclerotized plate on ventral border of lateral valve of ovipositor ( Fig. 64)..............................................................................................  P. martinezi