Andricus, Hartig, 1840

Duan, Yu-Bo, Liu, Luan, Zhu, Dao-Hong, Zeng, Yang & Liu, Zhiwei, 2024, Description of a new species of Andricus Hartig, 1840 (Hymenoptera: Cynipidae Cynipini) from China, Zootaxa 5474 (2), pp. 160-172 : 163-164

Key to Andricus species known from China

1. Female body entirely dull yellow. Clusters of spindle-shaped galls formed host branches as if in bundles................ 2

- Female body mostly black or yellowish-brown. Galls formed mostly on leaves and occasionally on buds, solitary or in clusters, but never spindle shaped or in bundles..................................................................... 3

2. Vertex coriaceous, covered with sparse short setae; antenna F1 straight......................... A. mairei Kieffer, 1906

- Vertex glabrate, covered with scattered long setae;.male antenna F1 strongly curved medially.................................................................................................... A. elodeoides Liu & Pang, 2022

3. Female antennae with 14 segments....................................................................... 4

- Female antennae with 13 segments....................................................................... 8

4. Anterior parallel lines, parapsidal lines, and median mesoscutal line absent....................................... 5

- Anterior parallel lines and lateral lines present, medial line absent or very short and indicated basally................... 6

5. Head brown anteriorly, especially on lower face; malar space without striae, frons with distinct alutaceous sculpture.............................................................................. A. formosanus Tang & Melika, 2009

- Head black anteriorly, malar space with striae; frons polished or very delicately sculptured................................................................................................ A. forni Pujade-Villar & Nicholls, 2020

6 Lateral propodeal carina delimiting a transverse rectangular area......................... A. kashiwaphilus Abe, 1998

- Lateral propodeal carinae weakly bowed outwards in the middle delimiting a smooth and bare quadrangular area......... 7

7 Mesoscutum with fused black spots present at anterior end of anterior parallel lines............. A. targionii Kieffer, 1903

- Mesoscutum with two separate black spots at anterior end of anterior parallel lines...... A. mukaigawae Mukaigawa, 1913

8 Female antennae F11 with a weak transverse suture.......................................................... 9

- Female antennae F11 without transverse suture............................................................. 11

9 Median propodeal area shining smooth, without wrinkles..................... A. pseudocurvator Tang & Melika, 2011

- Median propodeal area with some irregular wrinkles and rugae................................................ 10

10 Lower face coriaceous, transfacial line slightly longer than the height of eye with evenly dense white setae. Two distinct carinae present from lower rim of antennal sockets, converging at clypeus and forming a large “V” on lower face ( Fig. 2 ) and upper face with a broad transverse depression present between upper inner margin of eyes ( Fig. 2 )............................................................................................. A. wugangensis Zeng, Liu, & Zhu sp. nov.

- Lower face, including slightly elevated median area smooth, glabrous, with dense white setae. V-shaped carina on lower face and transfacial depression on upper face absent............................ A. xishuangbannaus Melika & Tang, 2012

11 Mesoscutum smooth, with some white setae............................... A. wuhanensis Ide, Abe, Su & Zhu, 2018

- Mesoscutum alutaceous to delicately coriaceous in anterior half, smooth or delicately alutaceous in posterior half, especially in area between notauli........................................................ A. songshui Tang & Melika, 2011

Figures

FIGURES 1–6. Andricus wugangensis sp. ♀. 1 general habitus; 2 head in anterior view; 3 head in posterior view; 4 head in lateral view; 5 head in dorsal view; 6 antenna.