Leiodes koreana Park & Ahn, 2007

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 : 51-53

8. Leiodes koreana Park & Ahn, 2007

Japanese name: Chôsen-ô-tamakinokomushi ( Figs. 27–29 , 112 )

Leiodes koreana Park & Ahn, 2007: 38 .

Type locality. Korea, Chungnam Prov., Gongju City, Banpo-myeon, Mt. Gaeryongsan

Specimens examined. JAPAN: KYUSHU: 1 ♂, 1 ♀, Miyazaki Pref., Takaoka, Takafusa , 27.v.2007, K. Iwakiri leg. ( FIT) ( FUFJ) ; 1 ♀, same data as the former except for the date, 24.vi.2007 ; 1 ♂, 1 ♀, Saga Pref., Mt. Sefuri-san (alt. 1000m), 16.–23.vi.2010, S, Nomura et al. leg. ( FIT) ( FUFJ). SHIKOKU: 1 ♂, 1 ♀, Ehime Pref., Uchiko Town, Shiromawari , 9.vii.1995, E.Yamamoto leg. ( FUFJ) ; 1♂, 2♀♀, Kagawa Pref., Ayagawa Town, Sogisho-higashi, Shôzaka , 12.–18.iv.2009, H. Fujimoto leg. ( FIT) ( FUFJ) ; 1 ♂, same data as the former except for the date, 13.–19.vi.2009 ; 5♂♂, 2 ♀♀, Tokushima Pref., Yamakawa Town, Okunoi , 23.–29.vi.2003, K. Tanaka leg. ( FIT) ( FUFJ) ; 4 ♂♂, 1 ♀, Tokushima Pref., Yamakawa Town, Mt. Kôtsu , 25.vii.–2.viii.2003, K. Tanaka leg. ( FIT) ( FUFJ) ; 1♂, Tokushima Pref., Misato Village, Ôhira (alt. 800m), 14–23.vii.2003, Y. Kurota leg. ( FUFJ). HONSHU: 3 ♂♂, 1 ♀, Osaka Pref., Minoo City , Minoo Park , 13-15.v.2007, T. Lackner leg. (1♂ in ZSPC, others in JCHE) ; 2 ♂♂, Mie Pref., Suzuka City , Nishi-Shônai-chô, Ichinotani , 6.v.2004, H. Yokozeki leg. ( FUFJ) ; 1 ♂, 1 ♀, Gifu Pref., Kani City, Yasaka-Rindô , 18.v.2003, K. Toyoshima leg. ( FIT) ( FUFJ) . KOREA: 1 ♂, Chunbuk Prov., Chôngûp, Naejangsan , Paekyang Area , 25.–26.v.1999, U.-S. Hwang & H.-J. Kim leg. ( FIT) ( CNUIC) ; 1 ♂, Kangwon Prov., Wonju City, Chiaksan , Kuryong Area , 10.vii.1999, U.-S. Hwang & H.-J. Kim leg. ( FIT) ( CNUIC) .

Diagnosis. Coloration. Dorsum brown; antennomeres 1–6 and 8 brown; antennomeres 7, 9, 10, and basal half of antennomere 11 dark brown, apical half of antennomere 11 light brown.

Body 3.2–4.4 mm long, ca. 1.7× as long as wide ( Fig. 27A ). Head densely punctate, usually bearing some large punctures ( Fig. 27A ); antennomeres 1–3 each longer than wide; remaining antennomeres each wider than long; antennomere 11 robust ( Fig. 27C ). Pronotum simply and very feebly curved at posterior margin, punctation similar to that on head. Elytra not transversely strigose; each elytron bearing nine punctate rows with small number of large punctures and moderate number of very fine punctures between rows ( Fig. 27D ); row 9 invisible in dorsal view, subhumeral row as long as ca. 1/3 of elytral length ( Fig. 27B ); elytral rows composed of larger punctures than those of pronotum ( Fig. 27A ); sutural stria fine, arising from apex ca. to apical 2/5 of the elytral length. Metathoracic wings fully developed. Mesoventrite with one shallow excavation between median carina and transverse carina ( Fig. 27E ); median carina of mesoventrite low ( Fig. 27E ); metaventrite without sexual dimorphism. Legs showing sexual dimorphism on protarsi, protibiae, mesotarsi, and metatibiae; metafemur robust, with small dorsal posteroapical projection ( Figs. 28G, 28H ).

Male. Protibiae gradually and distinctly widening from base towards apex at internal margins ( Fig. 28E ); tarsomeres 2–4 of protarsi and mesotarsi expanded ( Fig. 28A ); metatibiae curved inwards ( Fig. 28C ); abdominal sternite 8 weakly curved ( Fig. 29C ); aedeagus as shown in Figs. 29A, 29B .

Female. Protibiae gradually and very feebly widening from base towards apex at internal margins ( Fig. 28F ); protarsi and mesotarsi slender ( Fig. 28B ); metatibiae almost straight ( Fig. 28D ); abdominal sternite 8 forked in middle of anterior margin ( Fig. 29D ); coxites and stylus as shown in Fig. 29E .

Differential diagnosis. Leiodes koreana is similar to L. masatsugui sp. nov. by the characteristic shape of the female abdominal sternite 8 (see Figs. 29D and 35E ), but may be distinguished from the latter by having males with a relatively slender aedeagus ( Fig. 29A ). In contrast, males of L. masatsugui sp. nov. have a robust aedeagus ( Fig. 32A ).

Distribution. Japan (Kyushu, Shikoku, and Honshu), Korea. New to Japan.

Figures

Fig. 27. Leiodes koreana Park & Ahn, 2007.A – body, dorsal view; B – ditto, lateral view; C – antenna; D – elytral punctures; E – mesoventrite, lateral view. Scale I: 1 mm for A and B; II: 0.5 mm for C; III: 0.2 mm for E.

Fig. 28. Leiodes koreana Park & Ahn, 2007. 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: 1 mm for A–D; II: 0.2 mm for E and F; III: 0.2 mm for G and H.

Fig. 29. Leiodes koreana Park & Ahn, 2007.A – aedeagus, dorsal view; B – ditto, lateral view; C – male abdominal sternite 8; D – female abdominal sternite 8; E – coxite and stylus. Scale I: 0.5 mm for A and B; II: 0.2 mm for C and D; III: 0.1 mm for E.

Fig. 112. Distribution of Leiodes koreana group in Japan. Solid line – L. masatsugui sp. nov.; broken line – L. koreana Park & Ahn, 2007; (●) L. toyoshimai sp. nov.; arrow – suggested migration pathway of L.koreana group from the continent to Japan.

Fig. 35. Leiodes toyoshimai sp. nov.A – aedeagus, dorsal view; B – ditto, lateral view; C – apex of aedeagus, ventral view; D – male abdominal sternite 8; E – female abdominal sternite 8; F – coxite and stylus. Scale I: 0.5 mm for A–C; II: 0.2 mm for D and E; III: 0.1 mm for F.

Fig. 32. Leiodes masatsugui sp. nov.A – aedeagus, dorsal view; B – ditto, lateral view; C – male abdominal sternite 8; D – female abdominal sternite 8; E – coxite and stylus. Scale I: 0.5 mm for A and B; II: 0.2 mm for C and D; III: 0.1 mm for E.