Rasnitsynaphis ennearticulata, 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 : 169-170

Rasnitsynaphis ennearticulata sp. n. Fig. 1

Material.

Holotype: PIN 3064/2109(2211); Baissa, Transbaikalia; Zaza Formation, bed 31.

Etymology.

From the Greek term ennea for “nine” and from the Latin term articulum for “segment” in reference to the 9-segmented antennae.

Diagnosis.

Antennae rather long; segment III three times as long as wide;segments IV–VIII of about the same length, rectangular, longer than wide. Media with three branches.

Description.

Length of the body 2.1 (Fig. 1c). Width of head 0.43 (Fig. 1a). Lateral sutures join in the middle of epicranium in the four fifth of the head length. On the dorsal side of head capsule there are three diagonal strips, running from the middle part of epicranium to the frontolateral edge of head. The distance between ocelli (situated on the back of head) 0.27. Length of the apical segment of rostrum 0.18 (Fig 1e). Antennae 0.93 long, ca. 0.8 of thorax width (Figs 1b, d). Length of antennal segments: I 0.06; II 0.08; III 0.23; each of IV–VII 0.09; VIII 0.08; IX 0.07. Antennal segment III with about 17 rows of rhinaria, with at most 8 rhinaria arranged in one row. Segments IV–VIII at most with 7 rows of rhinaria. Tibia of fore legs 0.75 long, middle tibiae 0.83 to 0.86. Mesothoracic sternite 0.93 wide, 0.53 long. Fore wings about 3.8 long. The distance from the base of the wing to the end of pterostigma 2.8. Distance between bases of cubital veins CuA1 & CuA2 0.14. The length of M1+2 more or less equals the length of the common stem of M. The posterior part of abdomen strongly sclerotized (Fig. 1f).