Leiodes kamezawai, 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 : 94-98

publication ID	https://doi.org/ 10.5281/zenodo.4272467
DOI	https://doi.org/10.5281/zenodo.4339463
persistent identifier	https://treatment.plazi.org/id/03E98224-3261-070C-769E-4639FD63A72F
treatment provided by	Felipe
scientific name	Leiodes kamezawai
status	sp. nov.

Treatment

20. Leiodes kamezawai View in CoL sp. nov.

Japanese name: Amami-ô-tamakinokomushi ( Figs. 1 View Fig , 61–63 View Fig View Fig View Fig , 116 View Fig )

Type locality. Japan, Ryukyus, Kagoshima Pref., Amami-Ôshima Is., Mt. Yuwandake.

Type material. JAPAN: RYUKYUS: HOLOTYPE, ♂, Kagoshima Pref., Amami-Ôshima Is., Mt. Yuwandake , 21.– 24.ii.2010, S. Nomura leg. ( FIT) ( MNHAH). PARATYPES: 5 ♀♀, same data as holotype ( FUFJ) ; 4 ♀♀, Kagoshima Pref., Amami-Ôshima Is., Mt. Yuwandake , 26.–27.iii.2002, H. Sugaya leg. ( FIT) ( FUFJ) ; 1 ♂, Kagoshima Pref., Amami-Ôshima Is., Sumiyô Village, near Santarô-tôge , 27.ii.2004, H. Kamezawa leg. ( FIT) ( FUFJ) .

Diagnosis. Body 2.6–3.4 mm long, ca. 1.9× as long as wide. Dorsum brown or light brown. Each elytron with nine distinct rows of punctures, without subhumeral row. Mesoventrite with a distinct excavation between median carina and transverse carina. Median carina of mesoventrite low. Mesotibiae without distinct sexual dimorphism. Male metafemur slender, bearing large dorsal projection posteroapically. Male metatibiae distinctly curved. Female abdominal sternite 8 with a spiculum ventrale.

Description. Measurement of holotype: Body length 2.9 mm; head 0.60 mm in length and 0.87 mm in width; pronotum 0.82 mm in length and 1.4 mm in width; elytra 1.8 mm in length and 1.6 mm in width.

Coloration. Dorsum shining and almost unicolor, brown or light brown; antennomeres 1–6 and 8 brown; antennomeres 9, 10, and basal 2/5 of 11 dark brown; apical 3/5 of antennomere 11 light brown; legs brown or light brown; mesoventrite, metaventrite and abdominal ventrites brown or light brown.

Body 2.6–3.4 mm in length, ca. 1.9× as long as wide.

Head ca. 1.6× as wide as long, ca. 0.65× as long as and 0.63× as wide as pronotum, minutely and densely punctate ( Fig. 61A View Fig ) and usually bearing some large punctures ( Fig. 61A View Fig ); antennomeres 1–3 each longer than wide; antennomeres 4 and 11 each as long as wide; remaining antennomeres each wider than long; antennomere 11 robust ( Fig. 61C View Fig ); relative lengths of antennomeres 2 to 11 – 2.4: 3.3: 1.3: 1.6: 1.3: 2.7: 1.0: 3.6: 3.4: 4.8.

Pronotum ca. 1.6× as wide as long, ca. 0.48× as long as and 0.88× as wide as elytra, widest near base, simply and very feebly curved at posterior margin, minutely and densely punctate, punctation similar to that on head ( Fig. 61A View Fig ).

Scutellum distinctly punctate.

Elytra ca. 1.1× as long as wide in dorsal view, widest ca. at basal 1/4 ( Fig. 61A View Fig ), 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. 61D View Fig ); row 9 almost straight, subhumeral row absent ( Fig. 61B View Fig ); rows composed of punctures larger than those of pronotum ( Fig. 61A View Fig ); 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 distinct excavation between median carina and transverse carina ( Fig. 61E View Fig ); median carina of mesoventrite low ( Fig. 61E View Fig ); metaventrite sexually dimorphic, sparsely pubescent, distinctly microreticulate except for almost smooth middle portion.

Legs showing sexual dimorphism on protarsi, mesotarsi, metafemora, and metatibiae; protibiae gradually widening from base towards apex at internal margins ( Figs. 62E, 62F View Fig ).

Male. Middle portion of metaventrite densely and finely pubescent ( Fig. 61F View Fig ); tarsomeres 2–4 of protarsi and mesotarsi a little expanded ( Fig. 62A View Fig ); metafemur slender, triangularly protuberant ca. at midlength of posterior margin ( Fig. 62C View Fig ), bearing large dorsal projection posteroapically ( Fig. 62G View Fig ); metatibiae slender, curved inwards, bearing some very tiny spines at internal margins ( Fig. 62C View Fig ); abdominal sternite 8 moderately curved ( Fig. 63C View Fig ); aedeagus relatively thick ( Figs. 63A, 63B View Fig ); median lobe simply styloid in dorsal view ( Fig. 63A View Fig ), feebly curved in lateral view ( Fig. 63B View Fig ); each paramere slender, distinctly expanded at about basal 2/5, bearing two apical setae ( Fig. 63A View Fig ).

Female. Middle portion of metaventrite sparsely and finely pubescent ( Fig. 61G View Fig ); protarsi and mesotarsi slender ( Fig. 62B View Fig ); metafemur relatively robust, weakly curved along posterior margins ( Fig. 62D View Fig ), with moderate dorsal projection posteroapically ( Fig. 62H View Fig ); metatibiae almost straight and relatively robust ( Fig. 62D View Fig ); abdominal sternite 8 with spiculum ventrale at central point of anterior margin ( Fig. 63D View Fig ); coxites and stylus as shown in Fig. 63E View Fig .

Differential diagnosis. Leiodes kamezawai sp. nov. is similar to L. okawai in having slender metafemora, but can be distinguished from the latter by having antennae with antennomere 11 only a little narrower than antennomere 10 ( Fig. 61C View Fig ) and the male metatibiae distinctly curved ( Fig. 62C View Fig ). In contrast, L. okawai has antennomere 11 clearly narrower than antennomere 10 ( Fig. 64C View Fig ) and male metatibiae feebly curved ( Fig. 65C View Fig ). Leiodes kamezawai sp. nov. is also similar to the Chinese species L. nikodymi Švec, 1991 by having slender metafemora and metatibiae, but can be separated from it by having the median lobe of the aedeagus rounded apically in dorsal view ( Fig. 63A View Fig ). In contrast, L. nikodymi has the median lobe protuberant apically.