Tetraneura, Hartig, 1841

Watanabe, Tomoko, Lee, Wonhoon, Sano, Masakazu, Murakami, Keisuke & Akimoto, Shin-Ichi, 2022, Taxonomic revision of the Tetraneura akinire species group (Insecta, Aphididae, Eriosomatinae), with description of a new species and a correction of a nomenclatural confusion, Zootaxa 5183 (1), pp. 162-186 : 184

Key to Tetraneura ovaliformis sp. nov., T. akinire, and T. sorini

I. Fundatrix first instar nymph

1. Antenna 0.12−0.14 mm long and more than 0.75 times as long as hind femorotrochanter …......... T. ovaliformis sp. nov.

- Antennae longer than 0.15 mm long and less than 0.75 times as long as hind femorotrochanter........................ 2

2. Hind femorotrochanter 0.18−0.27 mm long........................................................... T. akinire

- Hind femorotrochanter mostly longer than 0.27 mm long................................................. T. sorini

II. Emigrant adult

1. First tarsal chaetotaxy 3:3:3............................................................ T. ovaliformis sp. nov.

- First tarsal chaetotaxy 3:3:2 or 3:2−3:2................................... .. T. akinire or T. sorini (indistinguishable)

III. Sexupara adult

1. First tarsal chaetotaxy 3:3:3............................................................ T. ovaliformis sp. nov.

- First tarsal chaetotaxy 3:3:2 or 3:2−3:2.................................................................... 2

2. Cornicle 0.04−0.05 (0.04) mm in diameter. Wax gland plates on marginal abdomen with minute round facets of similar size. T. akinire

- Cornicle 0.06−0.08 (0.07) mm in diameter. Wax gland plates on marginal abdomen with two types of facets, larger ones of which are present in the center of plate, and small ones present peripherally................................. T. sorini