Engelimyia, 1975

Buenaventura, Eliana & Pape, Thomas, 2015, Phylogeny of the Peckia-genus group: evolution of male genitalia in the major necrophagous guild of Neotropical flesh flies (Diptera: Sarcophagidae), Organisms Diversity & Evolution (New York, N. Y.) 15 (2), pp. 301-331 : 323

Genus Engelimyia

Lopes (1975, 1983) considered Engelimyia as part of Paraphrissopoda (synonymised under Peckia by Pape 1996). Later, in a morphology-based phylogenetic analysis and revision of Engelimyia, Pape and Mello-Patiu (2006) did not find evidence to support the paraphyly of Peckia with respect to Engelimyia and could not associate Engelimyia with any Sarcophaginae genera. With a more extensive taxon sampling, the monophyly of Engelimyia is here confirmed.

The monophyly of Engelimyia is here supported by nine character states: (1) male hind femur curved, (2) cercal apex bluntly swollen in lateral view, (3) cercal prong equipped with lateral keels, (4) surstylus with bifid apex, (5) juxta as a deflated balloon, (6) base of the lateral stylus expanded into a stylar lateral plate (labeled as slp in Figs. 1g and 4), (7) base of the lateral stylus expanded into a stylar membranous lobe (labeled as sml in Figs. 1g and 4), and (8) median process modified into a bulbous and membranose structure (Figs. 1f, g and 4). All these states are unique autapomorphies in our phylogenetic hypothesis ( Fig. 8 ).

Our analyses confirm the bluntly swollen cercal apex (lateral view) and the cercal prong equipped with lateral keels as synapomorphies for Engelimyia , as proposed by Pape and Mello-Patiu (2006).

In the phylogenetic analysis of Giroux et al. (2010), Engelimyia was supported by six morphological character states, but these were all homoplasious. The structure that Giroux et al. (2010) considered homologous to the median stylus (see Giroux et al. 2010: fig. 7a, b) is here homologized with the vesica. In consequence, we scored the vesica as present for Engelimyia , while Giroux et al. (2010) scored it as absent. The median stylus in Engelimyia is here homologized with the bulbous and membranous structure (Figs. 1f, g and 4), with denticles, placed medially on the proximal section of the distiphallus, near the base of the juxta.

Figures

Fig. 8 Majority-rule (50 %) consensus tree from the BI analysis of the morphological data using the third character-coding scheme for the acrophallus