Abstract
A taxonomic revision of Megalothoracha Hendel, 1911 is provided, including a description of Megalothoraca rosalyae Wendt, sp. nov. from Colombia. The genus encompasses large species from Colombia, Ecuador, Peru and Bolivia (new record), and each species was described based either on males or females. These species can be diagnosed by long and slender mid and hind legs and wing longer than body, vein R2+3 with two strong curves on apical third, and short spurious vein medially. And males have costal vein conspicuously bowed anteriorly and thickened on medial portion. The following nomenclatural changes are made: Megalothoraca hendeli Enderlein, 1912, syn. nov. is a junior synonym of M. pterodontida Hendel, 1911; Batrachophthalmum teleopsis (Hennig, 1938) comb. nov. is transferred from Megalothoraca, and Batrachophthalmum quimbaya Carvalho, Wolff & Wendt, 2011, syn. nov. is a junior synonym of B. teleopsis. A key to species and illustrations of the female and male terminalia are provided.
Highlights
With about 210 valid species (Steyskal 1968, Wendt and Ale-Rocha 2014a, 2015) classified in 32 genera (Hancock 2010), richardiid flies have been insufficiently sampled in most regions of the world, and many of the included genera need to be revised
The genus has been recorded from Peru, Ecuador (Steyskal 1968), and Colombia (Wendt and Ale-Rocha 2016)
The author proposed Phlebacrocyma, which he described two new species based on female specimens
Summary
With about 210 valid species (Steyskal 1968, Wendt and Ale-Rocha 2014a, 2015) classified in 32 genera (Hancock 2010), richardiid flies have been insufficiently sampled in most regions of the world, and many of the included genera need to be revised. Hendel (1911b) first proposed the genus for a species from Peru – M. pterodontida, described based on males. The author proposed Phlebacrocyma, which he described two new species based on female specimens. We provide a new diagnosis and redescription of Megalothoracha and each of the six previously included species, based on the revision of all types. One species from Colombia is described, a new combination and synonymies are proposed, and an identification key and illustrations of the male and female terminalia are provided
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