Research Article |
Corresponding author: Mao-Ling Sheng ( shengmaoling@163.com ) Academic editor: Gavin Broad
© 2020 Shu-Ping Sun, Tao Wang, Tao Li, Mao-Ling Sheng.
This is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
Citation:
Sun S-P, Wang T, Li T, Sheng M-L (2020) Two new species of Strongylopsis Brauns (Hymenoptera, Ichneumonidae, Pimplinae) from Beijing, and a key to all species. Journal of Hymenoptera Research 79: 1-13. https://doi.org/10.3897/jhr.79.57726
|
Two new species of the genus Strongylopsis Brauns, 1896, are described and illustrated, S. propodealis Sheng & Sun, sp. nov. and S. punctata Sheng & Sun, sp. nov., both collected from Mentougou, Beijing, China. An identification key to all known species of Strongylopsis is provided.
China, key, new species, Pimplini, taxonomy
Strongylopsis Brauns, 1896, a small genus of the tribe Pimplini in the subfamily Pimplinae (Hymenoptera, Ichneumonidae), comprises seven species (
The hosts of Strongylopsis are still unknown, but other genera of Pimplini are known to be koinobiont endoparasitoids of (predominantly) Lepidoptera and Hymenoptera pupae (
In the last ten years the authors have been exploring the forests of Beijing: Mentougou, Fangshan, Yanqing, Pinggu, and have collected large numbers of ichneumonids. In the present research two new species of Strongylopsis, collected in this area, are described.
GSFGPM General Station of Forest and Grassland Pest Management, National Forestry and Grassland Administration, China
Specimens were collected with interception traps (IT), as described by
Photos of the types of Strongylopsis chinensis He, 1996 and S. xizangensis He & Liu, 2013 (deposited in
Images were taken using a Leica M205A stereo microscope with LAS Montage MultiFocus. Morphological terminology is mostly based on
Strongylopsis Brauns, 1896: 274. Type-species: Strongylopsis anomala Brauns.
(After
The key (females) of eight species of Strongylopsis is included, the female of S. abdominalis Kasparyan, 1974 is still unknown (
1 | Propodeum without transverse wrinkles, smooth, finely punctate (Fig. |
S. propodealis Sheng & Sun, sp. nov. |
– | Propodeum with transverse wrinkles dorsally (Fig. |
2 |
2 | Metasomal tergites almost entirely black (Fig. |
3 |
– | At least metasomal tergites 2 and 3 red (Fig. |
5 |
3 | Hind and middle femora black; hind tibia blackish brown. 1 m-cu with ramellus on anterior end. Malar space 1.5 as long as basal width of mandible | S. xizangensis He & Liu, 2013 |
– | Hind and middle femora reddish brown; hind tibia pale rufous. Ramellus in fore wing present or absent | 4 |
4 | Fore wing hyaline, radial cell weakly darkened along anterior margin. 1 m-cu with ramellus on anterior end. Malar space 0.60–0.95 as long as basal width of mandible | S. belua Kuzin, 1950 |
– | Fore wing evenly hyaline. 1 m-cu without ramellus. Malar space much longer than basal width of mandible | S. chinensis He, 1996 |
5 | Face with dense punctures. Head 1.5–1.6 × as wide as length from lower margin of clypeus to upper margin of face (Fig. |
6 |
– | Face with sparse fine punctures. Head about 1.7–2.0 × as wide as length from lower margin of clypeus to upper margin of face | 7 |
6 | Metasomal tergites (1)2–4 red, tergites 5–8 black (Fig. |
S. punctata Sheng & Sun, sp. nov. |
– | Metasomal tergites all red (except base of tergite 1) | S. rufiventris Viktorov, 1958 |
7 | Fore wing dark brown, shorter than metasosma | S. victorovi Kasparyan, 1974 |
– | Fore wing hyaline, longer than metasosma | S. anomala Brauns, 1896 |
Propodeum (Fig.
Body length 8.0–8.5 mm. Fore wing length 5.0–6.0 mm.
Head. Head 1.6 × as wide as length from lower margin of clypeus to upper margin of face. Inner margins of eyes almost parallel. Face (Fig.
Mesosoma. Lateral concavity of pronotum (Fig.
Metasoma. Metasomal tergites (Figs
Coloration
(Fig.
Unknown.
Etymology. The specific name is derived from the large, oblong, smooth propodeum (Fig.
Material examined. Holotype: China • ♀; Beijing, Xiaolongmen, Mentougou; 23.VI.2012; IT by Shi-Xiang Zong. Paratypes: China • 1♀; same data as for holotype except 16.VI.2009. • 3♀♀; same data as for holotype except 8–30.VI.2012; IT by Tao Wang, Shi-Xiang Zong. • 2♀♀; same data as for holotype except 28–29.VI.2013.
Unknown.
China.
The new species is similar to Strongylopsis chinensis He, 1996, but can be distinguished from the latter by the following combination of characters: frons without median carina; fore wing vein 1cu-a opposite M&RS; areolet pentagonal, receiving vein 2m-cu approximately 0.6 × distance from vein 2rs-m to 3rs-m; propodeum without wrinkles, without median longitudinal concavity; first tergite 1.6–1.7 × as long as posterior width; apical half of clypeus reddish brown. Strongylopsis chinensis: frons with median carina; vein 1cu-a distal of M&RS; areolet quadrate, receiving vein 2m-cu approximately 0.72 × distance from vein 2rs-m to 3rs-m; propodeum with transverse wrinkles, with median longitudinal concavity; first tergite 1.45 × as long as apical width; clypeus entirely black.
Face (Fig.
Body length 11.5–12.0 mm. Fore wing length 8.5–9.0 mm.
Head. Head 1.6 × as wide as length from lower margin of clypeus to upper margin of face. Inner margins of eyes slightly convergent ventrally. Face (Fig.
Mesosoma. Lateral concavity of pronotum (Figs
Metasoma. Metasomal tergites (Fig.
Coloration
(Fig.
Unknown.
The specific name is derived from the densely punctate face (Fig.
Holotype : China • ♀; Beijing, Xiaolongmen, Mentougou; 13.VI.2008; IT by Tao Wang. Paratypes: China • 1♀; same data as for holotype except 23.VI.2012. • 1♀; same data as for holotype except 31.V.2013; Mao-Ling Sheng leg. • 2♀♀; same data as for holotype except 25.VI.–9.VII.2014.
Unknown.
China.
The new species is similar to Strongylopsis anomala Brauns, 1896, but can be distinguished from the latter by the following combination of characters: head 1.6 × as wide as length from lower margin of clypeus to upper margin of face; face (Fig.
It is known that the males of Ichneumonids are often more easily caught using interception traps (IT) or Malaise traps. Even though the authors have been exploring the mountains around Beijing for ten years and have collected/ obtained large numbers of ichneumonids, males of Strongylopsis have still not been found.
Maybe the males of Strongylopsis are less distinctive than females, some parts with more or less different coloration from female, but they can be recognised by the strong spine-like setae on the tibia; the gradually narrowed first tergite, with rounded edges and antenna with tyloids.
The males of some ichneumonid groups are not easy to match with females based on morphological characters (
The authors would like to express their cordial thanks to Drs Gavin R. Broad (NHMUK) and Dmitry R. Kasparyan (ZISP) for reviewing the manuscript. The authors also are deeply grateful to Dr. Jing-Xian Liu (