Although the ascoids have not been displayed, as well as the papillae and Newstead spines, the character set, such as palpomere 5 longer than 3 + 4; gonostyle with three spines, paramere simple and lateral lobe longer than the gonocoxite permit the specimen to be to included a new species in the genus Pintomyia. The absent of row spine in the hindfemur exclude the new species of the Pintomyia sensu stricto. Pintomyia dissimilis nov. sp. is close to Pifanomyia subgenus, series serrana, in which some species present three spines on the gonostyle in the same arrangement as this new fossil species.
Four extant species in series serrana have three well developed spines in the gonostyle, i.e. Pintomyia orestes (Fairchild & Trapido, 1950), Pintomyia christophei (Fairchild & Trapido, 1950), Pintomyia diazi (Gonzalves & Garcia, 1981), and Pintomyia novoae (Gonzalves & Garcia, 1981). All these species present tufts of bristles in the gonocoxite, absent in the fossil species.
Of 14 male fossil species described, 10 belong to the genus Pintomyia . Pintomyia paleopestis (Peñalver & Grimaldi, 2005) and Pintomyia brazilorum Andrade Filho, Galati & Falcão, 2006 present only two developed spines in the gonostyle [7, 8] while in Pintomyia falcaorum Brazil & Andrade Filho, 2002, Pintomyia killickorum (Andrade Filho, Falcão, and Brazil, 2004) Pintomyia filipalpis (Peñalver & Grimaldi, 2005), Pintomyia paleotownsedi Andrade Filho, Falcão, Galati, and Brazil, 2006, Pintomyia paleotrichia Andrade Filho, Brazil, Falcão, and Galati, 2007, and Pintomyia dominicana Andrade Filho, Galati & Brazil, 2009 this structure has four spines [5, 7, 9–12]
Only two phlebotomine fossil species have three developed spines in the gonostyle, i. e., Pintomyia succini (Peñalver & Grimaldi, 2005) and Pintomyia miocena (Peñalver & Grimaldi, 2005) . Pintomyia dissimilis nov. sp. differ from both by the aspect of the paramere, that presents a strong curvature, absent in the other species.
One species, Lutzomyia adketis Poinar Jr 2008 was described based in one female, with the following characteristics: sc forked with the branches meeting the costa and radius veins and the shape and size of the spatulate rods on the ninth sternite . Although the principals vein sections are not described, the sc is free in Pintomyia dissimilis and can be used to separate both species.