Comprehensive Description

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Differential diagnosis

Toxomerus Macquart, 1855 belongs to Syrphinae (Syrphidae) and it is the only genus included in Tribe Toxomerini, with approximately 150 species described in the world. It occurs mainly in the Neotropical Region with 143 species, followed by the Neartic Region with 16 species (9 endemic) (Borges and Couri 2009).

The genus Toxomerus is characterized by : eye with distinct triangular emargination on posterior margin; gena narrow; arista bare; postpronotum bare; meron bare; anatergum bare; katatergum bare; posterior spiracle with short pile on margin; metasternum bare; metaepisternum pilose; metaepimeron bare; male genitalia well sclerotized, very short to long postanal process arising from fused surstylar apodemes and projecting caudad between bases of surstyli (Borges and Couri 2009).

Toxomerus flaviplurus is a small species (less than 9 mm in lenght), scutum all dark [usually only postpronotum yellow]; scutellum pale pilose; katepisternum withouth dorsal yellow macula or greatly reduced; wing entirely microtrichose, brown to brownish black; pro- and mesofemora black except yellow apical apices; male genitalia greatly enlarged; female abdomen much broader than head.


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© Mengual, Ximo

Source: Flower flies (Syrphidae)

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