Nuvol umbrosus Navás wings: a, c, d, e, f Brazil, Rondônia, CAT b Brazil, Amazonas, FS. Note the unforked apical veinlets, markings, radius turning downward at tip, forewing with four intracubital cells. b1 first upper Banksian cell b’1 first lower Banksian cell icu2, icu4 second and fourth intracubital cells im2 second intramedian cell i.g. inner gradate series m3 third median cell ma median arculus (base of first intramedian cell) Psm pseudomedia R radius Rs radial sector rf origin of radial sector rx1 first radial crossvein Sc subcosta.