Zeugophora nigricollis ( Jacoby, 1885 )

Takemoto, Takuya, 2019, Revision of the genus Zeugophora (Coleoptera, Megalopodidae, Zeugophorinae) in Japan, Zootaxa 4644 (1), pp. 1-62 : 15-19

Zeugophora nigricollis ( Jacoby, 1885) sp. rev.

[Japanese name: Munaguro-momobuto-hamushi]

( Figs 2 D–F, 8–11)

Pedrillia nigricollis Jacoby, 1885: 195 [type locality: Japan: Wada-tôge], synonymized as Pedrillia bicolor Kraatz, 1879 by Kimoto, 1986a: 309; Chûjô, 1932: 340 [ Japan, Korea]; Jolivet, 1957: 13 [catalogued].

Zeugophora nigricollis: Doi, 1927: 326 .

Zeugophora (Pedrillia) nigricollis: Crowson, 1946: 95 [ Japan]; Gressitt & Kimoto, 1961: 24, 27 [ Korea, Japan]; Chûjô, 1954: 51 [ Japan]; Chûjô & Kimoto, 1961: 119 [ Japan, Korea]; Kimoto, 1964: 108 [ Japan, Korea].

Zeugophora (Pedrillia) bicolor: Kimoto, 1986a: 309 [ Japan, Korea, E. Siberia]; Jolivet, 1957: 12 [listed]; Kimoto &Takizawa, 1994: 6, 99, 267; An & Kwon, 2002: 272 [redescription, Korea, Japan, China, Russia]; Silfverberg, 2010: 334 [listed]; Li & Liang, 2018: 133 [ China, Russia, Korea, Japan].

Zeugophora bicolor: Gressitt, 1945: 139 [listed]; An & Kwon, 1995: 91–92; Takizawa, 2006: 2 [listed]; Rodríguez-Mirón, 2018: 291 [listed].

Description. Measurement. Body length: PEL, male, 3.22–4.51 mm, female, 3.72–4.75 mm. Width: EW, male, 2.09–2.33 mm, female, 1.97–2.54 mm. Biometric data are given in Table 2.

Coloration. Body fulvous. Head black. Apex of mandible black. Antennae black. Pronotum black. Scutellum black. Elytra fulvous. Ventral surface black. Legs black.

Habitus. Body ovate.

Head ( Fig. 9A ) covered with sparse setiferous punctures; setae produced from inside punctures ( Fig. 10C ); frontoclypeal suture bisinuate, middle portion narrow, about one-third width of clypeus; labrum and clypeus convex and furnished with setae; length of clypeus longer than that of labrum. Canthus large, acutely triangular but apex rounded. Apex of mandible bifurcate and furnished with three teeth apically on inner margin; lateral angles furnished with setae ( Fig. 8D ). Antennae long; segments short, except for first, third, and fourth which are long and slender, and eleventh which is pointed; all segments setous, fifth through eleventh segments with shorter, denser setae ( Fig. 8C ).

Pronotum ( Fig. 8A , 9B ) with blunt lateral tubercles, strongly tapered towards base; groove of anterior margin distinctly impressed a narrow distance from margin; posterior marginal groove undulate and complete; lateral basal angles swollen and with two to five long setae near base; surface regularly convex and with reticulate coriaceous microsculpture, densely covered with coarse setiferous punctures ( Fig. 10B ); distance between punctures on central portion 1.5–3 times their own diameter, denser laterally. Setae produced from inside punctures ( Fig. 10B ).

Elytra short, leaving apex of pygidium exposed, moderately vaulted in lateral view; lateral sides ovate, widening approaching posterior margin; dorsal surface with reticulate coriaceous microsculpture ( Fig. 10D ), irregularly covered with dense setiferous punctures which are as coarse as on pronotum and separated by 1–3 times their diameter; setae produced just anterior to punctures ( Fig. 10D ); sutural and lateral grooves complete from elytral base to apex; basal areas of elytra weakly convex on either side of suture; humerus strongly protruding anteriorly; epipleuron narrow. Scutellum trapezoidal, with setae.

Disc of mesoventrite rugose; process densely furnished with setiferous punctures ( Fig. 8B , 9C ). Mesepisternum furnished with setiferous punctures except on posteroventral margin ( Fig. 8B , 9C ). Surface of metaventrite with reticulate coriaceous microsculpture ( Fig. 10C ), central area covered with setiferous punctures, becoming denser on lateral portions, setae produced from inside punctures ( Fig. 10C ). Surface of sternites with reticulate coriaceous microsculpture, sparsely covered with setiferous punctures. In male, posterior margin of 7th sternite evenly curved ( Fig. 9D ). In female, posterior margin of 7th sternite straight, but bisinuate on central portion ( Fig. 9E ).

Legs densely furnished with setae; tibial setae becoming denser and longer apically. Hind femora thickened. Fore tibiae straight; mid tibiae bowed on apical half; hind tibiae weakly bowed and feebly widened near apex; mid and hind tibiae with a sharply defined and finely crenulate carina along external face. Apex of protibia with one spur; apices of meso- and metatibiae with two spurs. Tarsi distinctly shorter than tibiae, and basal three segments gradually widened apically.

Male genitalia as shown in Fig. 11 A–F: 8th sternite furnished with setae, cylindrical, membrane long, allowing for posterior horizontal extension ( Fig. 11E, F ); spiculum fan-shaped ( Fig. 11D ); median struts of median lobe approximately 2.2 times as long as median lobe ( Fig. 11A ); apex of median lobe pointed and inclined to one side ( Fig. 11B ); paramere not developed ( Fig. 11C ).

Spermatheca as shown in Fig. 11G .

Host plant. Euonymus sieboldianus Blume [Japanese name: Mayumi].

Remarks. Zeugophora nigricollis is distinguished from Z. bicolor ( Kraatz, 1879) by the following characters. Color of pronotum; completely black in Z. nigricollis , posterior half fulvous in Z. bicolor ; ventral coloration; black in Z. nigricollis , thorax and abdomen fulvous in Z.bicolor ; male and female genitalia: shape of median lobe; median lobe is shorter and wider and apex of median lobe is narrower in Z. bicolor than Z. nigricollis ( Fig. 11B, I ); shape of spermatheca; stem is longer in Z. nigricollis than in Z. bicolor ( Fig. 11G, J ). Using the above-mentioned characters, I have decided to restore Z. nigricollis to a valid species from junior synonymy with Z. bicolor .

Types. Paratype 1 ex., sex unknown ( TARI): " FUKUSHIMA, JAPAN, 28.VII.1881, Col. G. Lewis ", "Cotype" , " Pedrillia nigricollis JACOBY , DET. M. CHUJO.", " Pedrillia nigricollis Jac, Det. T. Shiraki. ".

Specimens examined. Japan. [Hokkaido] Shiribeshi Dist.: 4 exs., Otaru, Zenibako , 7.VI.1956, T. Kumata leg. ( SEHU); 1 ex., Otaru, Katsuraoka, 17.V.2001, K. Takeuchi leg. ( OM). Nemuro Dist. : 1 ex., Nakashibetsu, Kenebetsu, 21.VI.1956, T. Kumata leg. ( SEHU). Tokachi Dist. : 1 ex., Lake Nukabira-ko , 24.VI.1986, T. Endô leg. ( SEHU). Ishikari Dist. : 1 ex., Sapporo, Heiwa, 28.V.1995, K. Ôsaki leg. ( SEHU). [Honshu] Niigata Pref.: 1 ex. Kurokawa, 10.VIII.1933, K. Baba leg. ( TARI); 1 ex., Myôkô-kôgen. Sennin-ike, 19.VIII.1992, M. Minami leg. ( MMPC). Ishikawa Pref.: 1 ex., Mt. Haku-san , 17.VI.1973, T. Mikage leg. ( SIPC). Fukushima Pref.: 1 ex., Mt. Îde-san , 12–13.VI.1976, H. Takizawa leg. ( HTPC); 1 ex., Higashiurakawa, Samegawa, 10.V.1998, H. Akiyama leg. ( SEHU). Gunma Pref.: 2 exs., Mt. Akagi , 9.VII.1966, Y. Komiya leg. ( SEHU); 1 ex., same data and collector but different date, 9.VII.1966, ( SEHU). Tochigi Pref.: 1 ex., Nikkô, 11–13.VI.1967, H. Takizawa leg. ( HTPC); 1ex., Nasu, Goyôtei, 19–20.V.2005, H. Takizawa leg. ( HTPC); 1 ex., Nikkô, Yumoto, 13.VI.2006, S. Maehara leg. ( TTPC). Gunma Pref.: 1 ex., Takasaki, Harunako, Numanohara, 11.VIII.2013, H. Suenaga leg. ( HSPC). Tokyo Pref.: 1 ex., Mt. Kawanori-yama , 26.VI.1966, Y. Komiya leg. ( SEHU); 1 ex., same data but different date and collector, 28.V.1968, H. Takizawa leg. ( HTPC); 1 ex., Okutama, Mt. Kawanori , 28.V.1986, H. Takizawa leg. Kanagawa Pref.: 2 exs., Hakone, 2.V.1981, H. Takizawa leg. ( HTPC), 1 ex., same data but different date and collector, 3.VII.1982, K. Sakaki leg. ( HTPC); 1 ex., Hakone, Sengokuhara, 15.V.1983, N. Ueno leg. ( MMPC); 2 exs., same data but different date and collector, 3.V.1985, Y. Komiya leg. ( SEHU); 1 ex., Hakone, Mt. Daikan-san, 15.VII.2013, H. Takizawa leg. ( HTPC); 1 ex., Hakone, Ôwaku-dani, 26.V.2014, K. Sakai leg. ( HTPC). Yamanashi Pref.: 1 ex., Kiyosato, 10.VIII.1966, Y. Komiya leg. ( SEHU); 1 ex., Daibosatsu-tôge, 25–26.VII.1972, H. Takizawa leg. ( HTPC); 1 ex., Mt. Daibosatsu , 27.VI.1982, H. Akiyama leg. ( SEHU); 2 exs., Daibosatsu, Hikawa Forest road, 19.V.1985, M. Hasegawa leg. ( MMPC), 4 exs., same data but different date and collector, 19.VI.1986, M. Harada leg.( MMPC); 2 exs., Sudama, Masutomi, 16–17.V.1987, H. Hayakawa leg. ( MMPC); 1 ex., Yamanakako, Mt. Ôhira , 4.VI.1988, M. Minami leg. ( MMPC); 1 ex., same data but different date and collector, 6.VI.1988, Y. Komiya leg. ( SEHU); 1 ex., Motosu-Kôgen, 12.VII.1998, H. Akiyama leg. ( SEHU). Nagano Pref.: 2 exs., Matsumoto, Shi- mashima-dani, 10.VIII.1950, T. Nakane leg. ( SEHU);. 1 ex., Kamikôchi, 23.VII.1951, T. Nakane leg. ( SEHU); 1 ex., Mt. Asama-yama , 27–28.VII.1962, K. Morimoto leg. ( KUM); 1 ex., Tadeshina, Shirakabakôgen, 11.VII.1967, K. Emoto leg. ( SIPC); 1 ex., Nagawa, Utsukushigahara, 5.VII.1970, H. Takizawa leg. ( HTPC); 1 ex., Mt. Tadeshina , 31.VII.1971, K. Endô leg. ( SIPC); 1 ex., Kirigamine, 1–2.VI.1974, H. Takizawa leg. ( HTPC); 2 exs., Lake Shirakaba-ko , 25.VII.1980, H. Takizawa leg. ( HTPC), 1 ex., same data and collector but different date, 6–7.VI.1987 ( HTPC); 1 ex., Wada, Omekura, 22.VII.1997, S. Tsuyuki leg. ( SEHU); 1 ex., Minami-maki, Nobeyama, 26.V.2014, H. Takizawa leg. ( HTPC). Shizuoka Pref.: 1 ex., Mt. fuji, Omotefuji-road, 30.IV.1973, Y. Kurosawa leg. ( NSMT), 1 ex., same data but different date and collector, 19.V.1984, S. Tsuyuki leg. ( NSMT); 2 exs., Mt. Ashitaka-yama , 24–25.V.1975, Takizawa leg. ( HTPC); 1 ex., Higashi-izu, Mt. Hôki , 1.V.1990, S. Tsuyuki leg. ( HTPC). Okayama Pref.: 1 ex., Kamisaibara, Mt. Sangajô , 31.V.1972, O. Yamaji leg. ( SIPC); 1 ex., Kagamino, Doi, 11.VI.2003, Y. Wtase leg. ( HSPC); 1 ex., Maniwa, Mt. Hoshi-yama , 2.V.2004, S. Watase leg. ( HSPC); 1 ex., Maniwa, Hiruzen, Myôren-keikoku, 28.IV.2007, A. Watanabe leg. ( HSPC). [Shikoku] Ehime Pref.: 4 exs., Kuma-kôgen, Saragamine, 8.V.2010, H. Suenaga leg. ( HSPC). [Kyushu] Ôita Pref.: 1 ex., Kuzyû, Mt. Kuro-dake , 13.VII.1996, S. Ômomo leg. ( HTPC) .

Distribution. Japan: Hokkaido, Honshu, Shikoku, Kyusyu.

Figures

FIGURE 2. Habitus of Zeugophora spp. A. Z. annulata, male, dorsal view; B. Ditto, ventral view; C. Ditto, lateral view; D. Z. nigricollis, male, dorsal view; E. Ditto, ventral view; F. Ditto, lateral view; G. Z. unifasciata, female, dorsal view; H. Ditto, ventral view; I. Ditto lateral view.

FIGURE 8. Zeugophora nigricollis (Jacoby, 1885). A. Pronotum, dorsal view; B. Thorax, ventral view; C. Antenna; D. Mandible, left part. Scales. A–C. 1 mm; D. 100μm.

FIGURE 9. Zeugophora nigricollis (Jacoby, 1885). A. Head; B. Pronotum, dorsal view; C. Thorax, ventral view; D. Male posterior margin of 7th sternite; E. Female posterior margin of 7th sternite.

FIGURE 10. Setiferous punctures of Zeugophora nigricollis (Jacoby, 1885). A. Head surface; B. Pronotum; C. Metaventrite; D. Elytron.

FIGURE 11. Zeugophora nigricollis (Jacoby, 1885) (A–G) and Z. bicolor (Kraatz, 1879) (H–J). A, H. Median lobe, lateral view; B, I. Apex of median lobe dorsal view; C. Tegmen, dorsal view; D. Spiculum; E. 8th sternite, ventral view; F. 8th sternite, dorsal view; G, J. Spermatheca.