Rasnitsynaphis quadrata, Homan, Agnieszka & Wegierek, Piotr, 2011

Homan, Agnieszka & Wegierek, Piotr, 2011, A new family of aphids (Hemiptera, Sternorrhyncha) from the Lower Cretaceous of Baissa, Transbaikalia, ZooKeys 130, pp. 167-174 : 171-172

Rasnitsynaphis quadrata sp. n. Fig. 3

Material.

Holotype: 3064/2279; Baissa, Transbaikalia; Zaza Formation, bed 31.

Etymology.

From the Latin term quadratus for “square” in reference to the square shape of antennal segments IV–VII.

Diagnosis.

Antennae quite short; segment III two times as long as wide; segments IV–VII of the same length, square, as long as wide. Media with two branches.

Description.

Length of the body 2.0 (Fig. 3b). Length of head 0.28. Head with lateral sutures. Length of the apical segment of rostrum 0.14 (Fig. 3c). Antennae 0.71 long, about 1/2 of thorax height (Fig. 3a, b). Length of antennal segments: I 0.06; II 0.07; III 0.16; each of IV–IX 0.06. Antennal segment III with about 9 rows of rhinaria, with at most 8 rhinaria arranged in one row. Segments IV–VIII at most with 4 rows of rhinaria. Femur of middle legs 0.54 long, tibia 0.73. Hind femur 0.57 long. Mesothoracic sternite 0.49 long. The distance from the base of the wing to the end of pterostigma 2.7. The distance between bases of cubital veins CuA1 & CuA2 0.11. The posterior part of abdomen weakly sclerotized.