The fern-feeder aphids (Hemiptera: Aphididae) from China: a generic account, descriptions of one new genus, one new species, one new subspecies, and keys

Fern-feeder aphids (Hemiptera: Aphididae) in China are represented by 13 species in 10 genera, including a new genus, Vietaphis gen. nov. , a new species, Vietaphis aliquantus sp. nov. , from Guizhou and Tibet on Plagiogyria japonicum , and a new subspecies, Amphorophora scabripes galba ssp. nov. , from Guizhou on Pentarhizidium intermedium . Two genera, Amphorophora Buckton and Idiopterus Davis, and four species or subspecies, Amphorophora ampullate ben-galensis Hille Ris Lambers and Basu, Idiopterus nephrelepidis Davis, Micromyzodium polypodii Takahashi, and Myzus filicis Basu, are reported for the first time in China. Apterae and alatae of Myzus filicis are redescribed herein, and with host plant notes. The fern-feeder aphid genus Ne-omacromyzus Lee is considered a junior synonym of Idiopterus . Furthermore, Neomacromyzus cyrtomicola Lee is transferred to the genus Idiopterus , as Idiopterus cyrtomicola (Lee), comb. nov. , which is herein considered a junior synonym of Idiopterus nephrelepidis Davis. Keys to Chinese fern-feeder species are provided. Morphological figures and biometrical data of Vietaphis aliquantus sp. nov. , Amphorophora scabripes galba ssp. nov. , and Myzus filicis are presented.