Euctenopus Ashmead, 1900; Neuchorus Uchida, 1931;. Phytodietus Gravenhorst, 1829; and Weisia Schmiedeknecht,. 1907 (Townes, 1969; Kostro-Ambroziak, ...
Japanese Journal of Systematic Entomology, 21 (1): 65–67. May 30, 2015.
The Subgenus Weisia Schmiedeknecht, 1907, of the Genus Phytodietus Gravenhorst, 1829 (Hymenoptera: Ichneumonidae: Tryphoninae), New to Japan and Eastern Palearctic Region So SHIMIZU1) and Kyohei WATANABE2) 1)
Sugadaira Montane Research Center, University of Tsukuba, Sugadaira Kogen Ueda, Nagano 386–2204, Japan 2) Kanagawa Prefectural Museum of Natural History, Iriuda 499, Odawara, Kanagawa 250–0031, Japan
Abstract The subgenus Weisia Schmiedeknecht, 1907, of the genus Phytodietus Gravenhorst, 1829, is newly recorded from Japan and the Eastern Palearctic region based on specimens of P. (W.) pitambari Kour & Jonathan, 1979 collected from North Ryukyu.
Introduction The genus Phytodietus Gravenhorst, 1829 belongs to the subfamily Tryphoninae and comprises four subgenera: Euctenopus Ashmead, 1900; Neuchorus Uchida, 1931; Phytodietus Gravenhorst, 1829; and Weisia Schmiedeknecht, 1907 (Townes, 1969; Kostro-Ambroziak, 2007). The subgenus Weisia contains 15 species from the Palaearctic, Oriental, Neotropical, Australasian, and Afrotropical regions (KostroAmbroziak, 2011ab; Yu et al., 2012), and can easily be separated from the other subgenera by the absence of areolet (Townes, 1969; Kasparyan, 2007; Kostro-Ambroziak, 2010). This subgenus has been previously studied in the Palearctic region (e.g. Gregor, 1935; Kolarov, 2003; Kostro-Ambroziak, 2007), although all records were from the Western part. Previously, only two of the subgenera, Neuchorus and Phytodietus, had been recorded from Japan (Uchida, 1928; Momoi, 1970); however, we recently discovered specimens belonging to the subgenus Weisia from Japan. In this paper, we report this subgenus from Japan and the Eastern Palearctic region for the first time.
Materials and methods The materials used are from the collections of the American Entomological Institute, Florida, USA (AEI) and Kanagawa Prefectural Museum of Natural History, Odawara, Japan (KPMNH). A stereoscopic microscope (Nikon SMZ1500) was used for observations. Figures 1, 2, and 5 were taken using a single-lens reflex camera (Nikon D90) fitted with a micro-lens (Nikon AF Micro-Nikkor 60 mm f/2.8D) and a teleplus teleconverter (Kenko N-AFD ×2 Teleplus MC7). Figures 3, 4, and 6 were taken using a CCD camera (Nikon Digital Sight DS-5M) mounted on the stereoscopic microscope. Morphological terminology follows that of Gauld (1991).
Results and Discussion Three specimens of Weisia are recognized from Japan. All three specimens were determined to be a single species, which is morphologically similar to P. (W.) pitambari Kaur & Jonathan, 1979. The Japanese specimens slightly differs from the holotype and original description (Kaur & Jonathan, 1979) in terms of coloration of the mesosoma, metasoma, and hind coxa. In this study, however, we determined these
Japanese specimens to be P. (W.) pitambari on account of the following two observations: (1) apart from coloration, there are no morphological differences between the Japanese and type specimens; and (2) the distribution record of this species is fragmentary, also being known from the Philippines and India (Kaur & Jonathan, 1979). This pattern suggests that this species is widely distributed in the Oriental region and may be distributed in Ryukyu which is geographically close to the Philippines. The original description of this species is more or less inadequate, hence we redescribe based on Japanese specimens as below.
Taxonomy Phytodietus (Weisia) pitambari Kour & Jonathan, 1979 [Japanese name: Kiiro-onaga-amebachimodoki] (Figs. 1–6)
Phytodietus pitambari Kour & Jonathan, 1979: 28. Specimens examined. Japan: 1 female, Kankake, Yakushima Is., Kagoshima Pref., 22. VII.-22. VIII. 2006 (T. Yamauchi) (KPM-NK 5001273); 1 female, Mt. Yui-dake, Amamioshima Is., Kagoshima Pref., 10. VIII. 2004 (H. Makihara) (KPM-NK 5001272); 1 female, Mt. Yamatogusukuyama, Amagi town, Tokunoshima Is., Kagoshima Pref., 26. V. 2007 (K. Watanabe) (KPM-NK 5001274). India: 1 female (holotype), “Assam: Rangapara Charouar Forest 30. IV. 1966 Joseph No. J144” (AEI). Description based on Japanese specimens. Female (n = 3). Body length, 7.0–8.5 mm. Head (Fig. 3), 0.7–0.8 times as long as maximum width. Face, 0.6–0.7 times as long as wide, slightly convex at the centre, roughly punctate. Frons slightly concave and punctate. Clypeus 0.5 times as long as width, sparsely punctate, convex, smooth ventral margin, no apical tooth. Malar space 0.4–0.5 times as long as basal width of the mandible. Subocular sulcus present. The upper tooth of the mandible is distinctly longer than the lower one. Occipital carina complete. Antenna with 45–46 flagellomeres. First flagellomere 1.5 times as long as second one. Mesosoma (Figs. 1, 2). Pronotum smooth and polished. Epomia absent. Mesoscutum slightly punctate. Notaulus Ⓒ Japanese Society of Systematic Entomology
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Shimizu, S. and K. Watanabe
Figs 1–6. Phytodietus (Weisia) pitambari Kour & Jonathan, female from Japan ― 1, Lateral habitus; 2, dorsal habitus; 3, head, frontal view; 4, fore wing (in part); 5, hind wing (in part); 6, hind leg, anterior view.
absent. Scutellum smooth and polished. Mesopleurum sparsely punctate. Epicnemial carina present except for middle part. Mesopleural fovea present. Metapleuron sparsely punctate. Submetapleural carina complete. Presence of a longitudinal concavity along the pleural carina. Propodeum smooth and polished, without transverse striae. Metasoma (Figs. 1, 2). Tergites slightly punctate, covered with distinct and rough hairs. First tergite 1.5–1.6 times as long as maximum wide. Glymma present. Ventrolateral and dorsolateral carinae of first tergite absent. Petiole 0.5 times as long as postpetiole. Second tergite 0.8–0.9 times as long as maximum wide. Laterotergites present, separated from remainder of tergite by carina on first to third tergites, except posterior part of third tergite. Ovipositor sheath 1.6–1.8 times as long as hind tibia. Wings (Figs. 4, 5). Fore wing (Fig. 3) length 7.0–7.5 mm. Areolet absent. Marginal cell of fore wing 0.3 times as long as wide. Distance between the vein 2rs-m and 2m-cu, 1.3–1.8 times as long as vein 2rs-m. Vein 2m-cu with two bullae. Hind wing (Fig. 4) length 5.0 mm. Length of vein Cu1 between vein M and vein cu-a 0.8 times as long as vein cu-a. Hind femur 5.8–6.1 times as long as wide. Posterior tibial spur of hind leg 1.4–1.6 times as long as anterior one. Tarsal claws pectinate. Coloration (Figs 1–6). Antenna black. Body yellow except for: vertex, three longitudinal stripes of mesoscutum, three spots of mesopleuron, transverse band of anterior part of propodeum, transverse spots on first to third metasomal tergites (partly incomplete in first and third tergites), dorsal marking of hind coxa, base and apex of hind tibia, and an anterior median spot of fifth to seventh metasomal tergites, black. Wings hyaline except for veins, brown. Ovipositor, brown, and its sheath black. Male. Unknown in Japan. May 30, 2015, JJSE 21 (1)
Distribution. Japan (New Record), India, Philippines. Remarks. This is the first record of this species from Japan. The record from Yakushima Island is also the first record of Weisia from the Eastern Palaeactic region. The coloration of Japanese specimens differs from the holotype as follows: (1) mesosternum with black mark in Japanese specimens (without black mark in holotype); and (2) middle and hind coxae and fourth metasomal tergite without black marks in Japanese specimens (middle and hind coxa and fourth metasomal tergite each with black marks in holotype).
Acknowledgments We would like to express our cordial thanks to H. Makihara (Forestry and Forest Products Research Institute) and T. Yamauchi (Museum of Nature and Human Activities, Hyogo) for the generous offering of the valuable specimens and to David Wahl (AEI) for his kind support in the AEI investigation. This study was partly supported by the Grant-inAid for JSPS KAKENHI (Grant number 26840134) awarded to KW.
References Gauld, I.D., 1991. The Ichneumonidae of Costa Rica, 1. Memoirs of the American Entomological Institute, 47: 1–589. Gregor, F., 1935. Zwei neue Arten der Ichneumonidae (Hym.) aus der Cechoslovalei. Bruenn, unpaginiert. 4 pp. H e , J . H . , X . X . C h e n & Y. M a , 1 9 9 6 . H y m e n o p t e r a : Ichneumonidae. Economic Insect Fauna of China. Science Press, Beijing, China. 697 pp. [In Chinese with English summary.] Kasparyan, D. R., 2007. Review of Mexican species of the genus Phytodietus Gravenhorst (Hymenoptera: Ichneumonidae). Zoosystematica Rossica, 16: 49–58. Kaur, R. & J. K. Jonathan, 1979. Ichneumonologica Orientalis,
Phytodietus (Weisia), new to Japan and Eastern Palearctic Region Part VIII. The tribe Phytodietini from India (Hymenoptera: Ichneumonidae). Oriental Insects Monograph, 9: 1–276. Kolarov, J., 2003. New Phytodietini (Hymenoptera, Ichneumonidae, Tryphoninae) species from Bulgaria. Acta Zoologica Bulgarica, 55: 43–48. Kostro-Ambroziak, A., 2007. A new species of the genus Phytodietus Gravenhorst, 1829 (Hymenoptera: Ichneumonidae) from Poland. Annales Zoologici (Warsaw), 57: 823–826. Kostro-Ambroziak, A., 2010. Phytodietus (Weisia) queenslandicus, a new species from Australia (Hymenoptera: Ichneumonidae). Annales Zoologici (Warsaw), 60: 553–557. Kostro-Ambroziak, A., 2011a. Phytodietus (Weisia) pearlus sp. nov. from South Africa (Hymenoptera: Ichneumonidae). Annales Zoologici (Warsaw), 61: 803–805.
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Kostro-Ambroziak, A., 2011b. A New Species of Phytodietus Gravenhorst, 1829 (Hymenoptera: Ichneumonidae: Tryphoninae) from North Africa. Entomological News, 122: 149–153. Momoi, S., 1970. Ichneumonidae (Hymenoptera) of the Ryukyu Archipelago. Pacific Insects, 12: 327–399. Townes, H., 1969. The genera of Ichneumonidae. Part 1. Memoirs of the American Entomological Institute, 11: 1–300. Uchida, T., 1928. Dritter Beitrag zur Ichneumoniden-Fauna Japans. Journal of the Faculty of Agriculture, Hokkaido University, 25: 1–115. Yu, D. S., K. van Achterberg & K. Horstmann, 2012. World Ichneumonoidea 2011. Taxonomy, biology, morphology and distribution. Taxapad®, Vancouver, Canada [flash drive] [Received: January 29, 2015; accepted: April 13, 2015]
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