Revisão taxonômica e análise filogenética das espécies de Retrocitomyia Lopes, 1983 (Diptera: Sarcophagidae)

Abstract

Retrocitomyia Lopes, 1983 is a Neotropical genus of medium-sized flesh flies (5-11 mm), characterized mainly by the postgonite laterally curved and pointed apex. This genus comprises 10 valid species which biology is poorly known. The taxonomic revision of the genus resulted in 11 species, being one new species, Retrocitomyia silveirai sp. n. All species are redescribed and illustrated. Distribution maps and an update of key for male identification is provided. In addition, it is proposed a hypothesis of the phylogenetic relationship to the species of the genus, based on 19 external morphological characters of male adults, mainly from terminalia. The analysis has 14 terminal taxa, being 11 ingroup and three outgroups. The monophyly of Retrocitomyia was recovered sustain by four autapomorphies: (1) abdominal ST5 with posterior arm long, (2) abdominal ST5 with median lobe rounded, (3) median lobe of abdominal ST5 protruding, (4) cercus with a dorsal concavity. The result of phylogenetic analysis shows a basal polytomy included the type-species (R. retrocita) and R. mizuguchiana, R. silveirai sp. nov., R. adolenda, e R. fluminensis. Besides that, the analysis recovered a clade (Clade A) formed by (R. andina, (R. mexicana + R. trinitatensis), (R. sisbiota + (R. urumajoensis + R. paraguayensis)).