Diplolepis, Geoffroy, 1762

Zhu, Qifan, Looney, Chris, Chen, Tianlin, Cuesta-Porta, Víctor, Zoltán, László, Wang, Yiping & Pujade-Villar, Juli, 2021, A new species of Diplolepis Geoffroy (Hymenoptera: Cynipidae: Diplolepidini) from northeastern China, Zootaxa 4985 (2), pp. 219-234 : 226-227

The species of Diplolepis currently known from China can be differentiated according to the following key.

1 Radial cell relatively long, at least 2.5 times longer than broad.................................................. 2

- Radial cell shorter, around 2.0 times longer than broad........................................................ 3

2 Radial cell closed, with infuscate veins and 2r vein without projection into the radial cell. Malar distance long, around 0.75 times as long as height of compound eye.................................... D. flaviabdomenis Wang, Liu & Chen

- Radial cell partially open in anterior margin, without infuscate veins and 2r vein with a projection into the radial cell. Malar distance shorter, around 0.5 times as long as compound eye height...................... D. abei Pujade-Villar & Wang

3 Head strongly transverse in frontal view, at least 1.7 times wider than high........................................ 4

- Head trapezoidal in frontal view, at most 1.5 times wider than high.............................................. 5

4 Vertex and mesoscutum smooth and shining. Occiput coarsely punctured. From Japan and Korea....... D. japonica Walker

- Vertex and mesoscutum distinctly alutaceous to coriaceous. Occiput coriaceous. From China.............. D. nr japonica

5 Head slightly wider than mesosoma. Median mesoscutal line present, shallowly impressed, about 1/2 of the entire length of mesoscutum. Areolet inconspicuous. Occiput coriaceous. Propodeum sparsely setose.............. D. valtonyci sp. nova

- Head distinctly narrower than mesosoma. Median mesoscutal line absent or only present by a very short depression (extending over 1/10 of mesoscutum length). Areolet present and large. Occiput smooth and shining with striae. Propodeum densely pubescent............................................................................................ 6

6 Antennae 12-segmented, with scapus and pedicel yellowish-brown. POL around 2.0 times longer than OOL. Parapsidal lines absent, almost invisible. Radial cell closed ( Fig. 4b ). Third and following metasomal tergites with distinct punctures dorsolaterally................................................................ D. hunanensis Wang, Rui, Liu & Chen

- Antennae 14-segmented, with scapus and pedicel black. POL around 3.0 times longer than OOL. Parapsidal lines distinct and extending almost the entire length of mesoscutum. Radial cell completely open in margin ( Fig. 4c ). All metasomal tergites without punctures................................................ D. minoriabdomenis Wang, Rui, Liu & Chen

Figures

FIGURE 4. Diplolepis valtonyci Zhu, Wang & Pujade-Villar ♀ sp. nova: (a) scutellum longer than wide, (b) scutellum almost as long as wide.