Tetraneura ovaliformis, Watanabe & Lee & Sano & Murakami & Akimoto, 2022

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 : 183-184

Diagnoses of Tetraneura ovaliformis sp. nov., T. akinire , and T. sorini

I. Fundatrix first instar nymph

T. ovaliformis sp. nov.: Body 0.62−0.71 (0.65) mm long, antenna 0.12−0.14 (0.13) mm long, and hind femorotrochanter 0.15−0.19 (0.17) mm long. Antennae 0.75−0.89 (0.81) times as long as hind femorotrochanter. Ultimate rostral segment 0.09−0.11 (0.10) mm long and 0.50−0.64 (0.57) times as long as hind femorotrochanter.

T. akinire: Body 0.63−0.83 (0.75) mm long, antenna 0.15−0.18 (0.16) mm long, and hind femorotrochanter 0.18−0.27 (0.23) mm long. Antennae 0.58−0.75 (0.68) times as long as hind femorotrochanter. Ultimate rostral segment 0.10−0.12 (0.11) mm long and 0.44−0.52 (0.47) times as long as hind femorotrochanter.

T. sorini: Body 0.76−1.19 (0.93) mm long, antenna 0.18−0.20 (0.18) mm long, and hind femorotrochanter 0.22−0.43(0.33)mm long.Antennae0.54−0.59(0.57)times as long as hind femorotrochanter.Ultimate rostral segment 0.10−0.17 (0.14) mm long and 0.28−0.55 (0.41) times as long as hind femorotrochanter. Tergites sclerotized strongly.

II. Emigrant adult

T. ovaliformis sp. nov.: First tarsal chaetotaxy 3:3:3. Antenna 0.36−0.38 (0.37) times as long as body. Antennal segment III 0.23−0.29 (0.25) mm long.

T. akinire: First tarsal chaetotaxy 3:2−3:2. Antenna 0.28−0.37 (0.33) times as long as body. Antennal segment III 0.18−0.25 (0.22) mm long.

T. sorini: First tarsal chaetotaxy 3:2:2. Antenna 0.34−0.38 (0.36) times as long as body. Antennal segment III 0.19−0.23 (0.21) mm long.

III. Sexupara adult

T. ovaliformis sp. nov.: First tarsal chaetotaxy 3:3:3. Antenna 0.43−0.46 (0.44) times as long as body. Antennal segment III 0.28−0.39 (0.33) mm long. Cornicle 0.039 −0.053 (0.045) mm in diameter. Wax gland plates on marginal abdomen with minute round facets of similar size.

T. akinire: First tarsal chaetotaxy 3:2−3:2. Antenna 0.37−0.43 (0.38) times as long as body. Antennal segment III 0.27−0.37 (0.33) mm long. Cornicle 0.04–0.05 (0.04) mm in diameter. Wax gland plates on marginal abdomen with minute round facets of similar size.

T. sorini: First tarsal chaetotaxy 3:2:2. Antenna 0.28−0.44 (0.38) times as long as body. Antennal segment III 0.24−0.32 (0.30) mm long. 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.