Tripartita Yeh, 2017

Ko, Chiun-Cheng, 2017, A new genus and two new species of galling aphids (Hemiptera: Aphididae) from Distylium (Hamamelidaceae) in Taiwan, Zootaxa 4323 (2), pp. 209-218 : 213

Genus Tripartita Yeh gen. n.

Type species: Tripartita formosana Yeh sp. n.

Generic diagnosis of the alate viviparous adult. Description of the genus is based on the morphology of alate viviparous adults in the gall generation. Body medium to large in size (1.53–2.34 mm). Antennae long, more than half of body length, 3-segmented; segment III often thickened on basal 1/3–1/2, with densely annular secondary sensoria. Rostrum short, not reaching coxae of mid-leg; rostral segments IV+V blunt. Prothorax well-developed and prominent, with 2 groups of wax glands on tergite. Tibiae imbricate, with distinct spinules; tarsi with minute imbricate spinules, 1st tarsal segments with 3-3-3 setae, 2nd tarsal segments with 4-4-4 capitate distal setae. Groups of wax glands present on abdominal segments I–VII, which are arranged in a row on each tergite; abdominal tergites I–VII covered with pale minute sculpturing which has a slightly reticulated pattern; tergites VII and VIII slightly sclerotized; 4 pairs of spiracles on each side of segments II–V. Siphunculi absent. Cauda transverse, not constricted at base. Anal plate bilobed.

Etymology. The generic name ‘ Tripartita ’ refers to the unusual three-segmented antenna of the alate viviparous adult.