Abstract
Richardiidae are a family of Tephritoidea in which most genera are poorly known taxonomically, including some which were poorly described with limited or no illustrations. With the aim to decrease this taxonomic gap, herein we review two scarcely known monotypic genera: Odontomerella Hendel, 1912 and Maerorichardia Hennig, 1937, both known only from the holotypes of their type species. Maerorichardia is the only genus of Richardiidae with mid and hind tibiae thicker than their respective femora, and the wing with the anal lobe distinctly developed. Odontomerella can be distinguished from the others richardiids by the postcranium reduced and little wider ventrally, the compound eye well developed, occupying most of the head, with the gena and postcranium very reduced, and the face short, with the oral margin distinctly concave. The limits of both genera are revised and better supported with the addition of new diagnostic characters. Odontomera flavipleura Hennig, 1938 is transferred to Odontomerella. The types of the species are revised and illustrated.
Highlights
Richardiidae are a small family of about 200 valid species (STEYSKAL 1968, WENDT & ALE-ROCHA 2014b, 2015) in 32 genera (HANCOCK 2010)
The family only occurs in the New World, and the vast majority of species are recorded from the Neotropical Region (ACZÉL 1950, STEYSKAL 1968)
The vials with terminalia and wing mounts were attached to the pins of the respective specimens
Summary
The examined specimens were borrowed from the following collections, with the curators listed in parentheses: BMNH – Natural History Museum, London, England Goodger); LACM – Natural History Museum of Los Angeles County, California, USA Kallweit); USNM – National Museum of Natural History, Washington, D.C., USA (A.L. Norrbom). The terminalia of the holotype of M. lugubris were not dissected and illustrated due to collection policies that do not allow detaching or dissecting parts of primary types; and the male terminalia of O. oxyptera were not dissected due to the fragile condition of the holotype. The wing, when necessary, was detached and mounted between cover slips in Canada balsam; the cover slips were glued to a cardboard. The vials with terminalia and wing mounts were attached to the pins of the respective specimens. Brackets ([ ]) indicate annotations that are not present on the specimen labels
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