Genus Pygostolus Haliday (Hymenoptera: Braconidae: Euphorinae) new to Korea

Published Date
1 December 2016, Vol.9(4):494–495, doi:10.1016/j.japb.2016.09.005
Open Access, Creative Commons license, Funding information
Short communication

Author 

• Hye-Rin Lee ^a,b,,
• Tae-Ho An ^a
• Bong-Kyu Byun ^b
• Deok-Seo Ku ^a

• aThe Science Museum of Natural Enemies, Geochang, South Korea
• bDepartment of Biological Science & Biotechnology, Hannam University, Yuseong-gu, Daejeon, South Korea

Received 4 August 2016. Revised 8 September 2016. Accepted 13 September 2016. Available online 21 September 2016. 

Abstract

The genus Pygostolus Haliday of the subfamily Euphorinae (Hymenoptera: Braconidae) with a newly recorded species, Pygostolus falcatus (Ness), is reported for the first time from Korea. Diagnosis and a photograph of the genus and species are provided.

Keywords

Braconidae

Hymenoptera

Korea

new record

Pygostolus

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Introduction

Pygostolus Haliday is a small genus of the subfamily Euphorinae. The genus contains five species in the Holarctic region (Yu et al 2012). Several undescribed Neotropical species have been collected to date (Shaw 1985). In the present study, the genus is reported for the first time from Korea, with a newly recorded species, Pygostolus falcatus (Ness).

Pygostolus mainly parasitizes adults of Curulionidae, less commonly adults of Chrysomelidae, and, as frequently reported, the larva of microlepidoptera (Loan and Holdaway, 1961, Achterberg van, 1992 and Chen and van Achterberg, 1997). The members of the genus leap onto the elytra of the host in order to oviposit and construct their cocoons on twigs or leaves (Loan and Holdaway, 1961 and Shaw and Huddleston, 1991). In the present study, we report the genus Pygostolus Haliday for the first time from Korea, including an unrecorded species.

Materials and methods

We provide the diagnosis and a photograph of the species. Examined material is deposited in the Science Museum of Natural Enemies (SMNE), Geochang, Korea. The specimen was photographed with Leica DMS 1000 using the Leica Application Suite [Leica Camera; Aktiengesellschaft (AG), Wetzlar, Germany]. Terminology used in this paper follows van Achterberg (1993). Abbreviations used in this study are as follows: SMNE—Science Museum of Natural Enemies, GW—Prov. Gangwon.

• Systematic accounts
• Family Braconidae Nees, 1811
  • Subfamily Euphorinae Foerster, 1862
    • Genus Pygostolus Haliday, 1833 (바구미성충살이고치벌속: 신칭)
• Pygostolus Haliday, 1833: 263; Shenefelt, 1969: 122; Achterberg, 1982: 137; 1985: 353; Shaw, 1985: 334; Tobias, 1986: 221, Achterberg, 1992: 350.

Diagnosis. Apex of antenna with spine; mesosternum flattened and of female very densely felty setose; vein 1-SR of fore wing present; vein 1-SR+M of fore wing present; vein M+CU1 of fore wing sclerotized; first metasomal tergite robust, strongly narrowed basally, almost parallel-sided or weakly convex behind spiracles; dorsope large and deep; ovipositor wide, strongly compressed; ovipositor sheath wide, densely transversely striate, rather flat.

• Pygostolus falcatus (Nees, 1834) 낫모양바구미성충살이고치벌 (신칭)
• (Figure 1)

  

  Figure 1. Pygostolus falcatus ♂, habitus, lateral aspect.

• Leiophron falcatus Nees, 1834: 44.
• Blacus falcatus: Wesmael, 1835: 101.
• Leiophron (Pygostolus) falcatus: Haliday, 1835: 20.
• Blacus (Pygostolus) falcatus: Tappes, 1869: 20.
• Pygostolus falcatus: Shenefelt, 1969: 122; Tobias, 1986: 222; Achterberg, 1992: 354; Chen and Achterberg, 1997: 101.

Diagnosis. Length of body 2.3–3.6 mm; of fore wing 3.6 mm. Antenna 26–30 segmented, third segment as long as fourth segment. Face and clypeus smooth; clypeus strongly convex; frons and vertex smooth and slightly convex. Notauli complete. Scutellum convex. Propodeum densely and finely rugose, with short median carina anteriorly and median areola obsolescent. Marginal cell comparatively short. Spurious part of vein R1 weakly pigmented. First metasomal tergite robust, parallel sided behind spiracles. Length of ovipositor sheath 0.25 times forewing, somewhat longer than height of apex of metasoma. Ovipositor gradually curved and comparatively slender. Yellowish brown, antenna dark brown (except scapus). Frons medially, stemmaticum, occiput and temples dorsally, mesosternum largely, propodeum, metapleuron dorsally, and ovipositor sheath blackish. The male is distinctly paler than the female.

Material examined. KOREA: 1♂, Yuilsa, Taebaek, GW, 20 ⅵ 1991 (Jong-Wook Lee)-coll. SMNE.

Distribution. Korea (new record), Europe, Armenia, Azerbaijan, Canada (Manitoba, Ontario, Prince Edward Island), China (Gansu), Kazakhstan, Kyrgyzstan, Mongolia, Russia (Buryatskaya Respublika, Chita Oblast, Khabarovsk Kray, Primor'ye Kray, Sakhalin Oblast, Sankt Ptersburg, Tomsk Oblast, Yakutskaya Respublika).

Host. Cryptocephalus bipunctatus (Chrysomelidae), Dasineura urticae(Cecidomyiidae), Homolobus (Apatia) truncator (Braconidae), Hypera variabilis, Otiorhynchus ligneus, Otiorhynchus ovatus, Phloeophagus lignarius, Phyllobius argentatus, Phyllobius maculicornis, Phyllobius pyri, Phyllobius urticae, Polydrusus pilosulus, Sitona crinita, Sitona cylindricollis, Sitona hispidula, Sitona humeralis, Sitona inops, Sitona lineata, Sitona scissifrons, Strophosoma rufipes, Thylacites incanus(Curculionidae) (after Shenefelt 1969).

Acknowledgments

This work was supported by a grant from the National Institute of Biological Resources, funded by the Ministry of Environment of the Republic of Korea(NIBR201501203).

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• Peer review under responsibility of National Science Museum of Korea (NSMK) and Korea National Arboretum (KNA).

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  Corresponding author.

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