Curtonotum anus (Meigen, 1830)

Klymko, John & Marshall, Stephen A., 2011, Systematics of New World Curtonotum Macquart (Diptera: Curtonotidae) 3079, Zootaxa 3079 (1), pp. 1-110 : 27

The Curtonotum anus species group

The Curtonotum anus species group is defined by its derived ovipositor wherein sternite 8 is laterally flattened anteriorly and invaginated posteriorly, tergite 10 is fused to the cerci, and the cerci have short stout setae. As indicated in the phylogenetic discussion, this species group includes two New World species, C. floridense and C. helvum , and four Old World species, C. amurensis , C. anus , C. maritimum , and C. shatalkini . The C. anus species group is distinguished from all New World congeners by the male cerci which fuse ventrally into an elongate, clubshaped extension, and the female cerci which have the unique combination of being separate apically and having specialized stout setae. They are the only species outside the C. murinum species complex that have essentially unmarked wings and a beige ground colour and microtomentum, but they differ from the C. murinum species complex by having only two pairs of marginal scutellar setae, an unlobed lower calypter, and no bold punctate scutal markings.