Volucella thompsoni Choi &amp; Ôhara &amp; Han 2006, n.sp.
Creators: name: Choi, Deuk-Soo
name: Ôhara, Kenji
name: Han, Ho-Yeon
Publisher: name: Zenodo
Year: 2006
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Bombyliidae
Volucella
Volucella thompsoni

description: <i>Volucella thompsoni</i> n.sp. (Figs. 1A–I, 5A–D) <i>Volucella matsumurai</i> Han et Choi, 2001: 125, 206 (as new name of <i>V. pellucens</i> var. <i>japonica</i> Matsumura, 1916), misidentification (see Remarks of <i>V. pellucens tabanoides</i>). <i>Diagnosis</i> This species can be readily distinguished from other members of the <i>Volucella pellucens</i> group by its longer abdominal tergite 2 (longer than tergite 3, or at most 2.4x wider than long; Figs. 5A, C). Males can be further differentiated by their basoflagellomeres in lateral view slightly constricted in middle (Fig. 1C) and the surstyli greatly shortened in lateral view (Figs. 1G, H). <i>Description</i> <i>Measurements and Ratios</i>. Body length 11–16mm; wing length 11–13.8mm; antennal length 0.92–1.26mm; wing­mesonotum ratio 2.46–2.89; eye ratio 0.51–0.59; eye contiguity­vertex ratio 0.44–0.59; eye contiguity­frons ratio 0.4–0.57; basoflagellomere ratio 2–2.57; vein R 4+5 ratio 0.26–0.3; vein M ratio 0.48–0.56; fore tibia­basotarsomere ratio 2.25–2.6; 2nd tergite ratio 2–2.39; 2nd tergite­scutellum ratio 1.64–1.95. <i>Male.</i> Head (Figs. 1A–C) yellow brown ground color with dark brown to black vertical triangle, post­ocular orbit, posteroventral portion of face, and gena; face yellow brown pilose with varying size of black macula posteroventrally; ventral portion of face distinctly protrude with more or less pointed apex; gena shiny black with short yellow setulae; lunule shiny yellow brown; frons yellow brown with black and yellow setulae mixed; eyes holoptic, dense pilose; antenna almost entirely yellow brown with black setulae; basoflagellomere 2.1–2.6x longer than wide, slightly constricted in middle. Thorax (Figs. 5A, B) with black setae and dense black to yellow brown setulae; 4–6 notopleurals, 4–5 supra­alars, 4–5 postalars; 4–6 prescutellars; 4–7 marginal scutellars; 3–5 anepisternals; scutum smooth, shiny black with brown to dark brown lateral margins; postpronotum pale yellow with yellow brown setulae; notopleuron smooth, shiny dark brown with yellow brown and black setulae mixed; scutellum smooth, shiny brown densely with short black setulae; pleural and sternal sclerites short pubescent; anterior anepisternum black with long yellow brown setulae; posterior anepisternum black with yellow brown and black setulae mixed; katepisternum black, mostly with long black setulae; anterior anepimeron shiny black with long black setulae; posterior anepimeron brownish black without any setulae; katepimeron brown to dark brown with yellow setulae; meron dark brown with few setulae posteriorly; metasternum black with long black setulae ventrally; katatergite dark brown with black setulae; anatergite dark brown without setulae. Wing (Fig. 5A) hyaline with broad discal and anterior apical dark brown maculae; narrow areas along veins M 1, dm­cu, CuA 1, and CuA 2 dark brown; wing surface microtrichose except for bare areas in anterior half of cell BM and anal lobe, and anterior 2/3 of cell CuP; 3–7 setulae along vein RS; calypter pale yellow, short pubescent with long plumose marginal hairs, lengths of hairs vary but longest one about 1/3 as long as halter; halter pale to yellow brown. Legs almost entirely black except basal 1/3–1/2 of fore and midtibiae dark brown; densely covered with black setulae. Abdomen (Figs. 5A, B) 1.3–1.7x longer than wide; tergite 1 shiny dark brown with yellow brown setulae; tergite 2 ivory white medially with narrow yellow brown longitudinal stripe, densely with pale setulae; tergites 3 and 4 shiny black with black setulae; sternite 1 black with yellow brown setulae; sternite 2 ivory white with pale setulae; sternite 3 anteriorly ivory white and posteriorly black; sternite 4 black with black setulae. Genitalia (Figs. 1G–I) dark brown in ground color; epandrium roughly square in lateral view; cercus yellow brown with yellow brown setulae, short, truncated in lateral view, surstylus greatly reduced with sharp posteromedial projection in lateral view, posterodorsally with inward directed 3–4 black teeth; hypandrium ventrally with whitish membrane; superior lobe basally with small triangular membranous area, single hook­like, curved downward; aedeagus pale yellow, largely membranous, and apically swollen. <i>Female.</i> Similar to male except for: frons almost entirely yellow brown; eyes (Figs. 1D–F) dichoptic; basoflagellomere transversely elliptic (1.9–2.3x longer than wide) without medial constriction; scutum with more extensive brownish portion than in male (Figs. 5A vs. C). <i>Type materials</i> Holotype Male, KOREA: Gangwon­do: Wonju­si: Panbu­myeon, Mt. Baegunsan, 28.VI.2000, D.­S. Choi &amp; S.­K. Kim. Paratypes: KOREA: Chungcheongbuk­do: Jecheonsi: Songgye­ri, Jeolgol, 29. VI.1997, H.­Y. Han et al., 1&amp;male;, 2&amp;female;, Chungcheongnam­do: Boryeong­si: Cheongna­myeon, Mt. Oseosan, 20.VII.1999, H.­Y. Han et al., 1&amp;female;, Gangwon­do: Wonju­si: Heungeop­myeon, Yonsei Univ. Campus, 3.VIII.1999, D.­S. Choi, 1&amp;female;; ditto, 16.VII.2003, H.­W. Byun, 1&amp;female;; ditto, 22. VI.2004, H.­W. Byun, 1&amp;female;; ditto, 5.VII.2004, D.­S. Choi et al., 3&amp;female;; Panbu­myeon, Mt. Baegunsan, 21.VII.1998, D.­S. Choi &amp; S.­K. Kim, 1&amp;male;, Yeongwol­gun: Yeongwol­eup, Mt. Taehwasan, 9. VI.2001, D.­S. Choi &amp; S.­K. Kim, 1&amp;male;, Gyeonggi­do: Seongnam­si: Namhansanseong, 17.VIII.1993, S.­J. Park, 1&amp;female;, Yangpyeong­gun: Yongmun­myeon, Mt. Yongmunsan, 30.VII.1998, H.­W. Byun et al., 1&amp;female;, Gyeongsangbuk­do: Yeongju­si: Sunheung­myeon, Mt. Sobaeksan, 11. VI.2004, H.­W. Byun et al., 1&amp;male;, Gyeongsangnam­do: Goseong­gun: Yeonghyeon­myeon, Bongrimri, 21. VI.1987, 1&amp;female;, Hamyang­gun: Macheon­myeon, Mt. Jirisan, Chilson Valley (706m), Malaise trap (70% EtOH), 27. VI –23.VII.2001, D.­S. Ku, 1&amp;female;; Yeohang­myeon, 31. V.1987, 1&amp;female;, Sancheong­gun: Samjang­myeon, Naewonsa, 13.VII.1990, D.­S. Ku, 2&amp;female;, Ulju­gun: Samnam­myeon, Mt. Yeongchuksan, 29. VI.2003, H.­Y. Han et al., 1&amp;female;, Ulsan: Sangbukmyeon, Mt. Gajisan, 23. VI.1987, 1&amp;female;; ditto, 24. VI.1987, J.­K. Kim, 1&amp;female;; ditto, 27. VI.1989, K.­S. Kim, 1&amp;female;; ditto, 1.VII.1990, J.­E. Park, 1&amp;female;; ditto, S.­S. Kim, 1&amp;female;, Jeollabuk­do: Mujugun: Sangbuk­myeon, Mt. Deogyusan, 24.VII.1999, K.­H. Kang, 1&amp;female;. JAPAN: Hokkaido: Kushiro, Lake Mashu (N. crater rim, Akan Nat. Park), 23–24.VII.1980, FC Thompson, 1&amp;male; (USNM); Zenibako, Otaru, 20.VII.1965, T. Kocha, 1&amp;male; (HUS), Zenibako, Otaru, 20.VII.1965, T. Kocha, 1&amp;male; (HUS); Mitsumata, Kamishihoro, Tokachi, 21.VIII.1993, K. Kuromoto, 1&amp;male;, 1&amp;female; (TPMT); Obihiro, 14.VIII.1995, H. Inoue, 1&amp;female; (OUHJ); Koibuku Riv., Hidaka, 16.VII.1962, 1&amp;female; (OUHJ); Hokkaido Univ. Exp. Forest, Tomakomai, 19.VIII.1977, K. Ôhara, 3&amp;female; (TPMT); ditto, M. Suwa, 1&amp;female; (TPMT); Ohnuma, Oshima, 30.VIII.1977, M. Yamamoto, 1&amp;female; (TPMT), Honshu: Mt. Hayachine, Iwate Pref., 26.VII.1975, K. Tsuruta, 1&amp;male; (TPMT); Renge Spa, Niigata Pref., 29.VII.1977, K. Baba, 1&amp;female; (TPMT); Japon: Chunzenji (Nikko, Tochigi Pref.,), 22. –7–15, Edme Gallois (HUS), Uenohara, Minakami, Gunma Pref., 10.VIII.1987, N. Tamaki, 1&amp;female; (TPMT); Kiso­Ontake, Nagano Pref., 30.VII.1994, H. Ohishi, 2&amp;female; (TPMT); Mt. Tateshinayama, Nagano Pref., 1.VII.1971, R. &amp; F. Ishikawa, 1&amp;male; (NSMT); Mt. Nyukasayama, Nagano Pref., 13.VII.1980, N. Koda, 1&amp;male; (TPMT); Mt. Mitsu­toge, Yamanashi Pref., 31.VII.1981, Y. Kurosawa, 1&amp;female; (NSMT); Gozaishi, Nirasaki, Yamanashi Pref., 3.VIII.1992, H. Ohishi, 2&amp;female; (TPMT); Daibosatu, Enzan, Yamanashi Pref., 19.VIII.1991, H. Ohishi, 1&amp;female; (TPMT); Hirkura, Mie Pref., 9. VI.1991, H. Ohishi, 2&amp;male; (TPMT); Sugi­toge, Kyoto City, Kyoto Pref., 25.VII.1992, H. Ohishi, 1&amp;female; (TPMT); Seryo, Kyoto Pref., 12.VIII.1937, T. Kimura, 1&amp;female; (TPMT); Kitayama Riv., Okutama­dani, Nara Pref., 26. VI.1994, Keitaro Harusawa, 1&amp;female; (TPMT), Shikoku: Mt. Takashiro­yama, Kisawa, Tokushima Pref., 17–18.VII.1994, Kiyoshi Masaki, 1&amp;male;, 1&amp;female; (TPMT). Except for the Japanese paratypes (depositories shown in parenthesis), all the other type specimens including the holotype are deposited in YSUW. <i>Distribution</i> Korea, Japan. <i>Biology</i> Unknown. <i>Etymology</i> This species is named after Dr. F. Christian Thompson who contributed a great deal for the systematics of Syrphidae. He initially suggested the study of <i>Volucella</i> to the first author. <i>Remarks</i> We have occasionally found this species mixed with <i>V. pellucens tabanoides</i> specimens under same identification labels in the Korean institutions. These two species superficially resemble each other, but the new species is easily separable by the longer abdominal tergite 2 in both sexes, and much darker vertex in female. Further examination of the male genitalia strongly suggests that this species might not even be closely related to <i>V. pellucens</i>. The male genitalic structures (especially the highly reduced surstyli; Figs. 1G, H) are so unique that we were not able to associate the new species with any other <i>Volucella</i> species. We are currently investigating this matter using both morphological and molecular data (Choi et al., in prep.). Our preliminary analysis based on mitochondrial 16S rRNA and COII gene sequences suggests that <i>V. thompsoni</i> n.sp. might be more closely related to <i>V. nigropicta</i> (the <i>zonaria</i> species group) than the other species of the <i>pellucens</i> species group.
description: Published as part of <i>Choi, Deuk-Soo, Ôhara, Kenji &amp; Han, Ho-Yeon, 2006, Taxonomic notes on the Volucella pellucens species group (Diptera: Syrphidae) with a description of one new species from the Eastern Palaearctic, pp. 1-19 in Zootaxa 1185</i> on pages 4-8, DOI: 10.11646/zootaxa.1185.1.1, http://zenodo.org/record/4920432
description: {"references": ["Han, H. - Y. &amp; Choi, D. - S. (2001) Family Syrphidae. Economic Insects of Korea 15. Insecta Koreana Supplement, 22, 224 pp. [In Korean.].", "Matsumura, S. (1916) Thousand Insects of Japan, Additamenta, 2. Tokyo. pp. 238 - 239. [In Japanese with English summary.]"]}