Cavariella Del Guercio (Hemiptera, Aphidinae, Macrosiphini) in China, with a new species, new synonymies, and first country records

Abstract

The genus Cavariella is distinguished from other Macrosiphini genera (Aphididae, Aphidinae) because it has a supra-caudal process on abdominal tergite VIII which possesses two setae distally. It is Holarctic in distribution, and half of its species are Asian. The Chinese fauna of this genus, 17 species, have been restudied, morphologically and through DNA barcodes. As a result: Cavariella hidaensis Takahashi is transferred to Elatobium; Cavariella sculptura Qiao & Xu, sp. nov. is described from specimens collected on Torilis and Cryptotaenia (Apiaceae); Cavariella cessana Zhang, Chen, Zhong & Li, syn. nov. and Cavariella largispiracula Zhang, Chen, Zhong & Li, syn. nov. are respectively junior synonyms of Cavariella aquatica (Gillette & Bragg) and Cavariella sapporoensis Takahashi; Cavariella gilgiana Zhang, Chen, Zhong & Li and Cavariella lhasana Zhang are confirmed as valid species and complete descriptions are provided; Cavariella bhutanensis Chakrabarti & Das, Cavariella nigra Basu, Cavariella pastinacae (Linnaeus), and Cavariella pustula Essig are recorded for the first time from China. Additionally, keys for species of Cavariella known in China are provided and modifications to the key by Blackman and Eastop of aphid species on Angelica (Aphids on World’s Plants) are presented.