Weitschatidae, Koteja, 2008

Lin, Shan, Yao, Yunzhi & Ren, Dong, 2018, A new scale insect of the extinct family Weitschatidae (Insecta: Hemiptera: Coccomorpha) from mid-Cretaceous Burmese amber, Zootaxa 4407 (3), pp. 427-434 : 432

Key to species of Weitschatidae based on adult macropterous males

1 Antenna with some setae forming distinct whorls and apical segment with curved bristles. Hamulohalteres leaf-shaped. Abdominal tergites VI and VII with tubular ducts in only 1 row................................................ 2

- Antenna with setae not forming whorls and apical segment without curved bristles. Hamulohalteres bilobate apically. Abdominal tergites VI and VII with tubular ducts in 2 to 4 rows..................................................... 3

2 Antenna significantly longer, 2.10–2.40 mm; Apex of abdomen with a pair of short tubercular projections................................................................................ Criniverticillus longicumulus gen. & sp. nov.

- Antenna shorter, 1.30–1.33 mm; Apex of abdomen without a pair of short tubercular projections................................................................................. Pseudoweitschatus audebertis Vea & Grimaldi, 2015

3 Flagellar setae long, length of longest seta 2–3 times width of segment and inserted almost perpendicular to longitudinal axis of segment. Basisternum without medial ridge................................... Weitschatus stigmatus Koteja, 2008

- Flagellar setae short, length of longest as long as width of segment and strongly bent at base, adhering to the segments. Basisternum with longitudinal medial ridge at latter part............................ Weitschatus vysniauskasi Koteja, 2008