Leiodes haradai, Hoshina, 2012

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 : 69-72

13. Leiodes haradai sp. nov.

Japanese name: Harada-ô-tamakinokomushi ( Figs. 42–43 , 114)

Type locality. Japan, Shikoku, Ehime Pref., Oda Town, Miyanodani (alt. 400 m).

Type material. JAPAN: SHIKOKU: HOLOTYPE, ♂, Ehime Pref., Oda Town, Miyanodani (alt. 400 m), 2.i.1995, E. Yamamoto leg. ( EUMJ).

Diagnosis. Body 2.4 mm long, ca. twice as long as wide. Dorsum brown. Head relatively large. Antennal club dark brown. Elytra densely, irregularly and coarsely punctate. Mesoventrite with one distinct excavation between median carina and transverse carina. Median carina of mesoventrite low. Metafemur with a distinct ventral rectangular projection posteroapically. Metatibiae very feebly curved.

Description. Measurements of holotype: Body length 2.4 mm; head 0.40 mm in length and 0.68 mm in width; pronotum 0.64 mm in length and 1.1 mm in width; elytra 1.4 mm in length and 1.2 mm in width.

Coloration. Dorsum shining and unicolor, brown; antennomeres 1–6 and 8 brown; remaining antennomeres dark brown; legs brown with tarsi slightly paler than remaining parts of legs; mesoventrite and metaventrite brown; abdominal ventrites light brown.

Head distinctly and densely punctate, bearing two large punctures ( Fig. 42A ); antennomeres 1–3 and 11 each longer than wide; antennomere 4 about as long as wide; remaining antennomeres each wider than long; antennomere 11 oval ( Fig. 42C ); relative lengths of antennomeres 2 to 11 – 2.8: 2.8: 1.7: 1.3: 1.2: 1.9: 1.0: 2.7: 2.8: 4.7.

Pronotum widest at base, simply and very feebly curved at posterior margin, and distinctly and densely punctate, punctuation similar to that on head ( Fig. 42A ).

Scutellum minutely punctate.

Elytra widest ca. at basal 1/3 ( Fig. 42A ), not transversely strigose, and densely, irregularly, and strongly punctate ( Figs. 42A, 42B ); punctation of elytra consisting of punctures of various sizes ( Fig. 42D ); sutural stria fine, reaching from apex to ca. apical half of the elytral length.

Metathoracic wings fully developed.

Mesoventrite strongly microreticulate, impunctate, almost glabrous, with a distinct excavation between median carina and transverse carina ( Fig. 42E ); median carina of mesoventrite low ( Fig. 42E ); metaventrite sparsely pubescent, strongly microreticulate except for almost smooth middle portion.

Protibiae gradually and very feebly widening from base towards apex ( Fig. 43C ); tarsomeres 2–4 of protarsi and mesotarsi expanded ( Fig. 43A ); metafemur with a distinct ventral rectangular projection ( Fig. 43B ) and a small dorsal projection posteroapically ( Fig. 43D ); metatibiae bearing less than ten small robust spines at about basal 3/5 of internal margins, very feebly curved inwardly ( Fig. 43B ).

Abdominal sternite 8 moderately curved ( Fig. 43E ); aedeagus slender ( Figs. 43F, 43G ); median lobe weakly expanded laterally from about apical half towards apex, lateral margins a little protuberant at apex ( Fig. 43F ), moderately curved in lateral view ( Fig. 43G ); each paramere bearing two apical setae ( Fig. 43G ); inner sac without distinct sclerites ( Fig. 43H ).

Female. Unknown.

Differential diagnosis. Leiodes haradai sp. nov. is similar to L. multipunctata in the irregularly punctate elytra, but may be separated from it by having relatively slender parameres in dorsal view ( Fig. 43F ). In contrast, the parameres of L. multipunctata are relatively thick in the basal half ( Fig. 52A ). Leiodes haradai sp. nov. also resembles L. hijikatai sp. nov. in the shape of the metafemora, but may be distinguished from it by having the head ca. 0.6× as long as the pronotum ( Fig. 42A ) and the median lobe of the aedeagus feebly expanded laterally at the apical 2/5 of the lateral margin ( Fig. 43F ). In contrast, L. hijikatai sp. nov. has the head ca. 0.5× as long as pronotum ( Fig. 44A ) and the median lobe relatively strongly expanded laterally at apical half of the lateral margin ( Fig. 46A ).

Etymology. This species is dedicated to a very popular samurai Sanosuke Harada (1840–1868) who was born in the Ehime Prefecture in which the type locality of this species is situated.

Distribution. Japan: Shikoku (Ehime Prefecture).

Figures

Fig. 42. Leiodes haradai sp. nov. 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. 43. Leiodes haradai sp. nov.A – male fore leg, ventral view; B – male hind leg, ventral view; C – male protibia, dorsal view; D – male metafemur, dorsal view; E – male abdominal sternite 8; F – aedeagus, dorsal view; G – ditto, lateral view; H – inner sac, dorsal view. Scale I: 0.5 mm for A; II: 0.5 mm for B; III: 0.2 mm for C; IV: 0.2 mm for D; V: 0.2 mm for E; VI: 0.5 mm for F and G; VII: 0.1 mm for H.

Fig. 52. Leiodes multipunctata (Rye, 1873).A – aedeagus, dorsal view; B – ditto, lateral view; C – parameres, lateral view; D – male abdominal sternite 8; E – female abdominal sternite 8; F – coxite and stylus. Scale I: 0.5 mm for A, B, and C; II: 0.2 mm for D and E, and 0.1 mm for F.

Fig. 44. Leiodes hijikatai sp. nov.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: 0.5 mm for E.

Fig. 46. Leiodes hijikatai sp. nov.A – aedeagus, dorsal view; B – ditto, lateral view; C – inner sac, dorsal view. Scale I: 0.5 mm for A and B; II: 0.1 mm for C.