Research Article |
Corresponding author: Mao-Ling Sheng ( shengmaoling@163.com ) Academic editor: Bernardo Santos
© 2016 Ying Zhang, Mao-Ling Sheng, Zi-Cheng Xiong.
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:
Zhang Y, Sheng M-L, Xiong Z-C (2016) A new species of Metopiinae (Hymenoptera, Ichneumonidae) parasitizing lepidopteran larvae in China. ZooKeys 572: 71-79. https://doi.org/10.3897/zookeys.572.8031
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A new species of Metopiinae, Trieces etuokensis Sheng, sp. n., is described and illustrated. Specimens were reared from two species of Lepidoptera: Bazaria turensis (Ragonot, 1887) (Pyralidae) from Balong, Dulan, Qinghai Province, and an unidentified psychid (Psychidae) from Mukainor, Etuoke, Inner Mongolia Autonomous Region, China. The new species is characterized by a yellow face and clypeus, fore and middle femora and hind tibia mainly black, antennae slightly longer than head and mesosoma combined, with 17 flagellomeres, occipital carina entirely absent, and the hind femur being compressed, 2.5 times as its long as maximum width.
Trieces , new species, Bazaria turensis , Pyralidae , Psychidae , China
Trieces Townes, 1946 (Hymenoptera, Ichneumonidae, Metopiinae) comprises 68 species (
The known hosts of Trieces Townes mainly belong to the lepidopteran families Elachistidae (
Herein one new species of Trieces is reported, reared from the pupae of Bazaria turensis (Pyralidae) and an unidentified psychid (Psychidae).
Mature larvae of the host, Bazaria turensis (Ragonot, 1887) were collected on 28 August 2013 in a forest from where there had been an outbreak lasting at least three years, and brought to the laboratory. The forest is a shrubbery (Fig.
Mature larvae of the psychid moth were collected in 16 September 2014 from a scrub where there had been an outbreak lasting at least fourth years, and brought to the laboratory. The scrub (Fig.
Images were taken using a Leica M205A Stereomicroscope with LAS Montage MultiFocus. Morphological terminology is mostly based on
Type specimens are deposited in the Insect Museum, General Station of Forest Pest Management (GSFPM), State Forestry Administration, People’s Republic of China.
Trieces Townes, 1946. Boletín de Entomologia Venezolana, 5:60. Type-species: Exochus texanus Cresson.
Interantennal process forming a triangular projection in front of antennal sockets. Anterior spur of mid tibia 0.25× to 0.65× length of posterior spur. Mesopleural suture indistinct or absent. Areolet absent. Lateral carina of first tergite weak or obsolescent. Second tergite with complete median and sublateral longitudinal carinae. Basal portion of sublateral longitudinal and median carinae of third tergite present. Epipleura of third to fifth tergites almost absent.
In
14 (15) | Head in dorsal view widened posteriorly behind eyes. Occipital carina obsolete. Metapleura as in Figs |
T. femoralis Tolkanitz |
15 (14) | Head in dorsal view not widened posteriorly behind eyes, parallel-sided. Metapleura as in figs 3, 16. Occipital carina absent. Face, clypeus, and genae of female yellow | 15(a, b) |
15a (15b) | Antenna not longer than head and mesosoma combined; fore wing with vein 1cu-a slightly distal of 1-M, nearly interstitial; length of hind femur 2.2× its width; hind tibia reddish yellow; antennae reddish yellow. (Male unknown). Mongolia | T. pumicatus Tolkanitz |
15b (15a) | Antenna longer than head and mesosoma combined; fore wing with vein 1cu-a distinctly distal of 1-M, distance between them 0.4× length of 1cu-a; hind femur distinctly compressed, 2.5× as long as maximum width; hind tibia mainly black; basal ventral profile of antennae red brown, basal dorsal profile blackish brown; apical portion brownish black. China (Inner Mongolia Autonomous Region) | T. etuokensis Sheng, sp. n. |
The specific name is derived from the holotype locality.
Holotype female reared from pupa of unidentified psychid moth on 27 October 2014, CHINA: Mukainor, 1476m, Etuoke, Inner Mongolia Autonomous Region, Mao-Ling Sheng. Paratypes: 1 male, same data as holotype except 24 October 2014. 1 female reared from pupa of Bazaria turensis (Ragonot, 1887) on 2 October 2013, China: Balong, 2857m, Dulan, Qinghai Province, Mao-Ling Sheng.
Malar space approximately as long as basal width of mandible. Ocular-ocellar line as long as diameter of posterior ocellus. Antenna slightly longer than head and mesosoma combined, with 17 flagellomeres. Occipital carina entirely absent. Metapleuron shiny, impunctate, lower posterior portion with distinct wrinkles. Hind femur compressed, 2.5× as long as maximum width. Face and clypeus yellow. Fore and middle femora and hind tibia mainly black.
Female. Body length approximately 2.8 mm. Fore wing length approximately 2.2 mm.
Head. Inner margins of eyes distinctly convergent downwards. Face (Fig.
Mesosoma. Lateral concavity of pronotum smooth, shiny, upper-posterior portion slightly rough, with dense shallow fine punctures. Epomia indistinct. Mesoscutum (Fig.
Metasoma (Figs
Color (Fig.
Male. Body length approximately 3.1 mm. Fore wing length approximately 2.5 mm. Antenna with 22 flagellomeres. Very similar to the female, except with hind first tarsomere yellow, apical portion pale brown yellow.
One female was reared from pupa of Bazaria turensis (Ragonot, 1887) (Lepidoptera: Pyralidae). One female and one male were reared from unidentified species of Psychidae (Lepidoptera) collected as mature larvae but details of development and emergence unknown.
Caragana intermedia Kuang & H.C. Fu (Leguminosae), Nitraria tangutorum Bobrov (Zygophyllaceae), Kalidium foliatum (Pallas) Moquin-Tandon (Amaranthaceae).
This new species is similar to T. pumicatus Tolkanitz, 2010 and can be distinguished from the latter by the following combination of characters: antenna slightly longer than head and mesosoma combined, with 17 flagellomeres (female); fore wing with vein 1cu-a distinctly distal of 1-M, distance between them 0.4× length of 1cu-a; hind femur compressed, 2.5× as long as maximum width; lateral longitudinal carinae of tergite 3 distinct on anterior 0.3; fore and middle femora, hind tibia mainly black; basal ventral profile of antennae red brown, basal dorsal profile darkish brown; apical portion brownish black. The same characters for Trieces pumicatus Tolkanitz are as follows: antenna not longer than head and mesosoma combined, with 20 flagellomeres (female); fore wing with vein 1cu-a slightly distal of 1-M, nearly interstitial; length of hind femur 2.2× its width; lateral longitudinal carinae of tergite 3 vanishing behind its middle; fore and mid legs, hind tibia reddish yellow, fore and mid femora slightly darkened on outer side; antenna reddish yellow.
The authors are deeply grateful to Drs. Gavin Broad (Department of Life Sciences, the Natural History Museum, London, UK) and Bernardo Santos (American Museum of Natural History, New York, USA) for reviewing this manuscript, and Yan-Ling Zhang (Director of Forestry Pest Control and Quarantine Station of Dulan, Qinghai, China) for her help in the course of exploration in Qinghai Province. This research was supported by the “Twelfth Five-year” National Science and Technology Support Program of China (Grant No. 2012BAD19B0701) and the National Natural Science Foundation of China (NSFC, No. 31372246, No. 31070585).