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1 June 2009 Two New Species of Dryinidae (Hymenoptera: Chrysidoidea) from China
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Abstract

Two new species, Fiorianteon isoneuron sp. nov and Anteon gaoligongense sp. nov, are described, respectively, from Xiaowutaishan Provincial Nature Reserve (Hebei Province, China) and Gaoligongshan National Nature Reserve (Yunnan Province, China). Fiorianteon isoneuron can be recognized from the related Palaearctic species F. junonium Olmi by the different shape of parameres (without a notch in dorsal view in F. junonium, with a deep notch in F. isoneuron) and stigmal vein (distal part much shorter than proximal part in F. junonium, about as long as in F. isoneuron). Anteon gaoligongense can be recognized from the related Oriental species A. indicum Olmi by the different shape of segment 5 of fore tarsus (with basal part much longer than distal part in A. indicum, slightly shorter than distal part in Anteon gaoligongense). Keys are provided for the determinations of the above species with illustrations of male genitalia and female chelae.

Translation provided by the authors.

Dryinidae (Hymenoptera: Chrysidoidea) are parasitoids of Hemiptera Auchenorrhyncha (Guglielmino & Olmi 1997, 2006, 2007). Fiorianteon Olmi, 1984, is a genus present in the Palaearctic and Oriental region. Only 3 species have been described from Japan and China (including Taiwan). Anteon Jurine, 1807, is a genus present in all zoogeographical regions. About 326 species have been described from all continents (Olmi 1999) and the genus was revised by Olmi (1984, 1991).

The species of Fiorianteon and Anteon inhabiting China were studied in the last 20 years mainly by Olmi (1991, 1995), He & Xu (2002), Xu et al. (1998, 2001), and Xu et al. (2003, 2006a, 2006b).

In 2008 we examined additional specimens of Fiorianteon and Anteon from P. R. China and have found 2 new species described herein.

MATERIALS AND METHODS

The descriptions follow the terminology used by He & Xu (2002) and Olmi (1984, 1994, 1999). The measurements reported are relative, except for the total length (head to abdominal tip, without the antennae), which is expressed in millimeters. In the descriptions, POL is the distance between the inner edges of the two lateral ocelli; OL is the distance between the inner edges of a lateral ocellus and the median ocellus; OOL is the distance from the outer edge of a lateral ocellus to the compound eye; OPL is the distance from the posterior edge of a lateral ocellus to the occipital carina; TL is the distance from the posterior edge of an eye to the occipital carina.

All material studied in this paper is deposited in the Hymenoptera collection of South China Agricultural University, Department of Entomology, Guangzhou, Guangdong, P. R. China (SCAU).

Fiorianteon isoneuron sp. nov. (Fig. 1)

  • Description. Holotype Male. Fully winged. Length 2.8 mm. Head black, except mandibles, clypeus and part of genae near antennal toruli testaceous-whitish; antennae brown; mesosoma black; gaster brown; legs testaceous, except mid coxae basally black and hind coxae almost totally black. Antennae filiform; antennal segments in the following proportions: 8:5:12:12:11:10:9:8:8:10. Head shiny, smooth, punctate, without sculpture among punctures; frontal line complete, very narrow in the posterior half of the face; occipital carina complete; POL = 5; OL = 2; OOL = 10; OPL = 6; TL = 11; greatest breadth of posterior ocelli longer than OL (4:2). Pronotum short, transverse, punctate, without sculpture among punctures. Scutum, scutellum and metanotum shiny, smooth, punctate, without sculpture among punctures. Notauli incomplete, reaching approximately 0.5 × length of scutum. Propodeum dull, reticulate rugose, without transverse or longitudinal keels. Forewing hyaline, without dark transverse bands; distal part of stigmal vein about as long as proximal part. Parameres with a deep notch in dorsal view (Fig. 1). Tibial spurs 1, 1, 2.

  • Female. Unknown.

  • Holotype: Male, P. R. CHINA, Hebei Prov., Zhangjiakou, Xiaowutaishan Provincial Nature Reserve, 20–22.VIII.2005, Jingxian Liu & Liqiong Weng (SCAU).

  • Etymology: This species is named isoneuron because the distal part of stigmal vein is very long and about as long as proximal part.

  • Remarks. Fiorianteon isoneuron is similar to the only known Palaearctic species F. junonium Olmi, 1984 (known from Japan). The above species can be recognized by the different shape of parameres (without a notch in dorsal view in F. junonium, with a deep notch in F. isoneuron) and stigmal vein (distal part much shorter than proximal part in F. junonium, about as long as in F. isoneuron), as follows:

  • Figs. 1 and 2.

    Male genital armatures (in dorsal view) of Fiorianteon isoneuron (1; holotype; scale bar = 0.06 mm) and Fiorianteon junonium (2; specimen from Japan, Uradani; scale bar = 0.11 mm). Right half removed.

    f01_217.eps

    1. Parameres without a deep notch in dorsal view (Fig. 2); distal part of stigmal vein much shorter than proximal part F. junonium Olmi

    - Parameres with a deep notch in dorsal view (Fig. 1); distal part of stigmal vein about as long as proximal part F. isoneuron sp nov.

    Anteon gaoligongense sp. nov. (Fig. 3)

  • Description. Holotype Female. Fully winged. Length 3.3 mm. Head black, except mandibles testaceous; antennae testaceous; mesosoma black; gaster brown; legs testaceous, except basal part of hind coxae blackish. Antennae clavate; antennal segments in the following proportions: 12:8:13:13:11:10:9:8.5:8:12. Head shiny, smooth, punctate, without sculpture among punctures; frontal line absent; face without 2 lateral keels near orbits directed towards the antennal toruli; POL = 6; OL = 3; OOL = 7; OPL = 7; TL = 5; greatest breadth of posterior ocelli shorter than OPL (3:7); occipital carina complete. Pronotum shiny, with anterior surface rugose; posterior surface shiny, punctate, without sculpture among punctures, shorter than scutum (7:21), more than twice as broad as long (27:7). Scutum, scutellum and metanotum shiny, smooth, finely punctate, without sculpture among punctures. Notauli incomplete, reaching approximately 0.6 × length of scutum. Propodeum with a strong transverse keel between dorsal and posterior surface; dorsal surface reticulate rugose; posterior surface with 2 complete longitudinal keels and median area almost completely smooth and shiny, rugose only along the lateral margins. Forewing hyaline, without dark transverse bands; distal part of stigmal vein slightly shorter than proximal part (9:11). Fore tarsal segments in the following proportions: 10:3:3.5:5:18. Enlarged claw (Fig. 3) with a proximal prominence bearing a long bristle. Segment 5 of fore tarsus (Fig. 3) with basal part slightly shorter than distal part (8:11), with 2 rows of 19 + 19 lamellae; distal apex with a group of about 9 lamellae. Tibial spurs 1, 1, 2.

  • Male. Unknown.

  • Holotype: Female, P. R. CHINA, Yunnan Prov., Gaoligongshan National Nature Reserve, 1–18.VIII.2005, Juanjuan Ma & Yali Cai (SCAU).

  • Etymology: The specific name derives from the Latin adjective gaoligongense (inhabiting Mt. Gaoligong).

  • Remarks. Anteon gaoligongense is similar to A. indicum Olmi, 1984 (known from India and Taiwan). The above species can be recognized by the different shape of segment 5 of fore tarsus (with basal part much longer than distal part in A. indicum, slightly shorter than distal part in A. gaoligongense), as follows:

  • 1. Segment 5 of fore tarsus with basal part much longer than distal part (Fig. 4) A. indicum Olmi

    Segment 5 of fore tarsus with basal part slightly shorter than distal part (Fig. 30) A. gaoligongense sp. nov.

    Figs. 3 and 4.

    Chelae of Anteon gaoligongense (3; holotype; scale bar = 0.08 mm) and Anteon indicum (4; holotype; scale bar = 0.08 mm).

    f03_217.eps

    ACKNOWLEDGMENTS

    We are grateful to Mr. Jingxian Liu (Zhejiang University), Miss Liqiong Weng, Miss Juanjuan Ma, and Miss Yali Cai (South China Agricultural University) for help in collecting dryinids in the field. This study was supported by the Ministry of Science and Technology of P. R. China (MOST grant N. 2006FY110500).

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    Zaifu Xu, Massimo Olmi, and Junhua He "Two New Species of Dryinidae (Hymenoptera: Chrysidoidea) from China," Florida Entomologist 92(2), 217-220, (1 June 2009). https://doi.org/10.1653/024.092.0204
    Published: 1 June 2009
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