Leiodes okawai Nakane, 1963

Hoshina, Hideto, 2012, Review of the tribes Sogdini and Leiodini from Japan and North Chishima Islands. Part II. Genera Hydnobius and Leiodes (Coleoptera: Leiodidae), Acta Entomologica Musei Nationalis Pragae (suppl. 1) 52, pp. 1-168 : 98-102

21. Leiodes okawai Nakane, 1963

Japanese name: Kiiro-ô-tamakinokomushi ( Figs. 6 , 64–66 , 116 )

Leiodes okawai Nakane, 1963: 41 ; DAFFNER (1983): 108 (redescription); PERREAU (2004): 197 (catalogue).

Type locality. Japan, Honshu, Mie Pref., Hirakura.

Type material examined. JAPAN: HONSHU: HOLOTYPE, ♂, Mie Pref., Hirakura , 12.vi.1960, T. Okawa leg. ( HUMS).

Additional material examined. JAPAN: KYUSHU: 1♂, Kumamoto Pref., Ue Village, Mt.Shiragadake 14.viii.2000, K, Kido leg. ; 1 ♂, Kumamoto Pref., forest in Itsukimura Village (32º28′36″N 130º46′42″E, alt. 900 m), 17.vii.2009, M.Makihara leg.( PT). SHIKOKU: 1 ♂, Kôchi Pref., forest in Aki (33º39′15.2″N 134º09′28.9″E, alt. 700 m), 30.vi.2010, M. Makihara leg. ( PT) ; 1 ♂, Kôchi Pref., forest in Aki (33º39′14.9″N 134º09′28.8″E, alt. 700 m), 4.viii.2010, M. Makihara leg. ( MT) ; 5 ♂♂, 1 ♀, Ehime Pref., West ravine of Mt. Shiratsue , 3.vii.1986, T. Nagata leg. (collected by treacle traps) ( EUMJ) ; 3 ♂♂, 1 ♀, Tokushima Pref., Yamakawa Town, Mt. Kôtsu , 2–10.viii.2003, K. Tanaka leg. ( FIT) ; 2 ♂♂, 1 ♀, Tokushima Pref., Yamakawa Town, Okunoi , 3–8.vii.2003, K. Tanaka leg. ( FIT) ; 1 ♂, 1 ♀, 8–14.vii.2003, same data as the former except for the date. HONSHU: 2 ♂♂, 2♀♀, Okayama Pref., Chûka Village, Mt. Yamanorisen , 11.vii.2004, Y.Fujitani leg.( FIT) ; 1♂, 3♀♀, Okayama Pref., Nagi Town, Takiyama , 29.vi.–9.vii.2005, S. Suzuki leg. ( FIT) ; 1 ♂, same data as the former except for the date, 14.–23.vii.2005 ; 6 ♂♂, 4 ♀♀, Okayama Pref., Nagi Town, Mt. Nagisan , 29.vi.–9.vii.2005, S. Suzuki leg. ( FIT) ; 1 ♂, 1 ♀, Mie Pref., Mt. Nonobori , 8.vii.2001, M. Inagaki leg. ( FIT) ; 1 ♀, same data as the former except for the date, 12.vii.2001 ; 1 ♂, 2 ♀♀, same data as the former except for the date, 15.vii.2001 ; 1 ♂, same data as the former except for the date, 22.vii.2001 ; 1 ♂, Gifu Pref., Shirakawa Village , Ô–shirakawa, 3.vii.2004, K. Toyoshima leg. ( FIT) ; 1 ♂, 1 ♀, 19.vii.2004, same data as the former except for the date ; 1 ♂, 1 ♀, same data as the former except for the date, 31.vii.2004 ; 1 ♂, 1 ♀, Fukui Pref., Ôno City, Heikedaira , 1.viii.1997, S. Inoue leg. ; 1 ♂, Shizuoka Pref., Sakuma Town, Mt. Ryuto-zan , 7.vii.1995, T. Kishimoto leg. ; 4 ♂♂, Tokyo Pref., Hinohara Village, Mt. Mitôsan (alt. 1100 m), 16–23.vii.2008, H. Takano leg. ( FIT) ; 1 ♂, 1 ♀, same data as the former except for the date, 16–23.vii.2008 ; 2 ♂♂, Saitama Pref., Ohtaki Village, Nakatsukawa-keikoku , Oku-Chichibu-rindô (alt. 1300m), 30.vii.–7.viii. 004, K. Arai & S. Arai leg. ( FIT) ; 2 ♀♀, Saitama Pref., Naguri Village, Mt. Arimayama (alt. 1200 m), 17.–24.ix.2004, K. Arai and S. Arai leg. ( FIT) ; 5 ♂♂, 1 ♀, Miyagi Pref., Sendai City, Mt. Izumigadake, Kuwanuma-rindô , 12.–22.vii.2009, M. Oikawa leg. ( FIT) ; 1 ♀, Aomori Pref., Kuroishi City, Nagayasawa , 28.v.1998, T. Ichita leg. ; 1 ♂, Aomori Pref., Mutsu City, Kanauchi-chô, Yunokawa-tôge , 24.vii.1999, S. Araki leg. All specimens except for type series are preserved in FUFJ .

Diagnosis. Coloration. Dorsum usually unicolor, brown or yellowish brown; antennomeres 1–6 and 8 brown; antennomeres 7, 9, 10, and basal 3/5 of antennomere 11 dark brown; apical 2/5 of antennomere 11 light brown.

Body 2.6–3.5 mm in length, ca. 1.8× as long as wide ( Fig. 64A ). Head densely and minutely punctate, bearing some large punctures ( Fig. 64A ); antennomeres 1–3 longer than wide; antennomere 11 about as long as wide; remaining antennomeres each wider than long; antennomere 11 robust and clearly narrower than antennomere 10 ( Fig. 64C ). Pronotum feebly sinuate at posterior margin, densely and minutely punctate ( Fig. 64A ). Elytra not transversely strigose; each elytron with nine rows of punctures, bearing small number of large punctures and moderate number of very fine punctures between rows ( Fig. 64D ); row 9 invisible in dorsal view, almost straight, subhumeral row absent ( Fig. 64B ); rows composed of punctures larger and deeper than those on pronotum ( Fig. 64A ); sutural stria fine, reaching from apex to ca. apical 3/5 of the elytral length. Metathoracic wings fully developed. Mesoventrite with one distinct excavation between median carina and transverse carina ( Fig. 64E ); median carina of mesoventrite low ( Fig. 64E ); metaventrite sexually dimorphic. Legs showing distinct sexual dimorphism on protarsi, mesotarsi, metafemora, metatibiae, and metatarsi; protibiae gradually widening from base towards apex at internal margins ( Figs. 65E, 65F ).

Male. Middle portion of metaventrite moderate pubescent ( Fig. 64F ); tarsomeres 2–4 of protarsi and mesotarsi a little expanded ( Fig. 65A ); metafemur very slender, weakly and triangularly protuberant at about middle of posterior margins ( Fig. 65C ), with large dorsal projection posteroapically ( Fig. 65G ); metatibiae slender and feebly curved ( Fig. 65C ); tarsomere 1 of metatarsi very long and feebly curved ( Fig. 65C ); abdominal sternite 8 strongly curved ( Fig. 66D ); aedeagus ( Figs. 66A, 66B ) relatively small, its length less than 1/5 of body length; inner sac as shown in Fig. 66C .

Female. Middle portion of metaventrite sparsely pubescent mainly on basal half and almost glabrous near metacoxae ( Fig. 64G ); protarsi and mesotarsi slender ( Fig. 65B ); metafemur moderately slender ( Fig. 65D ), with a moderate dorsal projection posteroapically ( Fig. 65H ); metatibiae almost straight ( Fig. 65D ); tarsomere 1 of metatarsi almost straight ( Fig. 65D ); abdominal sternite 8 with spiculum ventrale at central point of anterior margin ( Fig. 66E ); coxites and stylus as shown in Fig. 66F .

Differential diagnosis. Leiodes okawai is similar to the European L. cinnamomea (Panzer, 1793) in having the male metafemora with a large dorsal projection posteroapically but can be distinguished from the latter by having the pronotum feebly sinuate at the posterior margin, the male metatibia feebly curved ( Fig. 65C ), and the aedeagus relatively robust ( Fig. 66A ). In contrast, L. cinnamomea has the pronotum straight at the posterior margin, the male metatibia strongly curved, and the aedeagus relatively slender.

Distribution. Japan: Honshu, Shikoku, and Kyushu. New to Shikoku and Kyushu.

Figures

Fig. 6. Heads (A–I) and mandibles (J and K) of Leiodes spp. A – Leiodes yasudai sp. nov.; B – L. multipunctata (Rye, 1873); C – L. irregularis Hatch, 1929; D – L. osawai Nakane, 1963; E – L. yukihikoi sp. nov.; F – L. okawai Nakane, 1963; G – L. tanakai sp. nov.; H, J, K – L. lucens (Fairmaire, 1855); I – L. yoshidai sp. nov. Scale I: 0.5 mm for A–I; II: 0.2 mm for J and K.

Fig. 64. Leiodes okawai Nakane, 1963.A – body, dorsal view; B – ditto, lateral view; C – antenna; D – elytral punctures; E – mesoventrite, lateral view; F – male metaventrite; G – female metaventrite. Scale I: 1 mm for A and B; II: 0.5 mm for C; III: 0.5 mm for E; IV: 1 mm for F and G.

Fig. 65. Leiodes okawai Nakane, 1963. A – male fore leg, ventral view; B – female fore leg, ventral view; C – male hind leg, ventral view; D – female hind leg, ventral view; E – male protibia, dorsal view; F – female protibia, dorsal view; G – male metafemur, dorsal view; H – female metafemur, dorsal view. Scale I: 0.5 mm for A and B; II: 1 mm for C and D; III: 0.2 mm for E and F; IV: 0.5 mm for G and H.

Fig. 66. Leiodes okawai Nakane, 1963.A – aedeagus, dorsal view; B – ditto, lateral view; C – inner sac, dorsal view; D – male abdominal sternite 8; E – female abdominal sternite 8; F – coxite and stylus. Scale I: 0.5 mm for A and B; II: 0.1 mm for C; III 0.2 mm for D and E; IV: 0.1 mm for F.

Fig. 116. Distribution of Leiodes. okawai group: broken line – L. okawai Nakane, 1963, (●) L. yukihikoi sp. nov., (■) L. kamezawai sp. nov.