A New Species ofXestomyzaWiedemann, 1820 from South Africa, with a Key to the Genera of Xestomyzinae (Diptera: Therevidae)

Martin Hauser

doi:10.5733/afin.053.0111

Abstract

A new species, Xestomyza stuckenbergi sp. n., is described from the Western Cape Province, South Africa. The new species differs from the only previously described species of this genus, Xestomyza lugubris Wiedemann, 1820, being smaller and entirely covered in white pubescence and also having differences in the male terminalia. A third species of this genus is briefly described, but because there is only one female specimen available it is not formally named. Identification keys are provided to genera of the subfamily Xestomyzinae and to species of Xestomyza Wiedemann.

Highlights

The family Therevidae Newman, 1834 is distributed world-wide, with more than 1000 described species in about 130 genera. Lyneborg (1972) revised a monophyletic group of mainly African Therevidae and named it the Xestomyza-group
Before Lyneborg (1976) recognised WKLVVXEIDPLO\DQG7KHUHYLQDHWKHIDPLO\KDGQRLQWHUQDOKLHUDUFK\7KLVFODVVL¿FDWLRQ was followed in subsequent revisions of Therevidae, including major changes in genus circumscriptions (Irwin & Lyneborg 1981), with the tribe Xestomyzini elevated to subfamily status by Irwin and Webb (1992)
Phylogenetic placement of Agapophytinae genera is intermediate to the Phycinae and the Therevinae clades (Yang et al 1999; Winterton et al 2011), based on the selection of characters and taxa representing Phycinae by Winterton et al (2001)

Summary

Introduction

The family Therevidae Newman, 1834 is distributed world-wide (with the exception of Antarctica), with more than 1000 described species in about 130 genera. Lyneborg (1972) revised a monophyletic group of mainly African Therevidae and named it the Xestomyza-group. Lyneborg (1972) revised a monophyletic group of mainly African Therevidae and named it the Xestomyza-group. The small subfamily Xestomyzinae includes 10 genera and 47 species, of which one genus (Henicomyia Coquillett, 1898) with seven species is found in the New World (Coquillett 1898; Kröber 1931; Lyneborg 1972, 1976; Irwin 1973), but the greatest diYHUVLW\LVNQRZQIURPVRXWKHUQ$IULFDDQGUHFHQWO\IURP0DGDJDVFDU+DXVHU ,UZLQ 2005a7ZRIRVVLOVSHFLHVDUHNQRZQRQHIURP%DOWLFDQGRQHIURP0H[LFDQDPEHU +DXVHU ,UZLQb+DXVHU

Results

Conclusion