Leiodes yoshidai, 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 : 30-34

publication ID	https://doi.org/ 10.5281/zenodo.4272467
DOI	https://doi.org/10.5281/zenodo.4339414
persistent identifier	https://treatment.plazi.org/id/03E98224-3221-074C-76F1-41C5FC99A6AF
treatment provided by	Felipe
scientific name	Leiodes yoshidai
status	sp. nov.

Treatment

3. Leiodes yoshidai View in CoL sp. nov.

Japanese name: Tsurugi-ô-tamakinokomushi ( Figs. 6 View Fig , 13–15 View Fig View Fig View Fig , 110 View Fig )

Type locality. Japan, Shikoku, Tokushima Pref., Higashi-iyayama Village, Nagoro, Otome-dani.

Type material. JAPAN: SHIKOKU: HOLOTYPE, ♂, Tokushima Pref., Higashi-iyayama Village, Nagoro, Otomedani , 12–24.vii.2006, K. Tanaka leg. ( FIT) ( MNHAH). PARATYPES, 6 ♂♂, 4 ♀♀, same data as holotype except for the date, 5.–12.viii.2006 ; 2 ♀♀, Tokushima Pref., Kisawa Village, Mt. Jirôgyû , 14.–19.vii.2004, K. Tanaka leg. ( FIT) ; 1 ♂, 2 ♀♀, Tokushima Pref., Mt. Tsurugi, Minokoshi (alt. 1340 m), 2–17.vii.2006, K. Tanaka leg. ( FIT) ; 1 ♂, 1 ♀, 17.–28.vii.2006, 8 ♂♂, 5 ♀♀, same data as the former except for the date, 28.vii.–5. viii.2006 ; 1 ♂, 1 ♀, Tokushima Pref., Higashi-iyayama Village, Mt. Tsurugi (alt. 1750–1800 m), 7.viii.2004. H. Kamezawa leg. ; 6 ♂♂, 5 ♀♀, Tokushima Pref., Mima City, Koyadaira, Mt. Maruzasayama , Kawakami (alt. 1380 m), 18.–22.vii.2007, K. Tanaka leg. ( FIT) ; 1 ♂, Tokushima Pref., Mima City, Koyadaira, Mt. Ichinomori , Fujinoikedani (alt. 1300 m), 17.vii.–1.viii.2007, K. Tanaka leg. ( FIT) ; 2 ♂♂, Ehime Pref., Mt. Odamiyama, Namakusa-dani , 6.vii.1995, E. Yamamoto leg. All paratypes preserved in FUFJ .

Diagnosis. Body length 2.4–2.8 mm, ca. 1.6× as long as wide. Dorsum brown or dark brown. Each elytron with nine distinct rows of punctures and subhumeral row as long as ca. 1/3 of elytral length. The rows composed of minute punctures. Mesoventrite with one shallow excavation between median carina and transverse carina. Median carina of mesoventrite low. Metafemora robust. Mesotibiae without distinct sexual dimorphism. Male metatibiae weakly curved. Each paramere of aedeagus with a transparent large lobe. Female abdominal sternite 8 with a spiculum ventrale.

Description. Measurements of holotype: Body length 2.5 mm; head 0.40 mm in length and 0.74 mm in width; pronotum 0.76 mm in length and 1.3 mm in width; elytra 1.5 mm in length and 1.5 mm in width.

Coloration. Dorsum shining and almost unicolor, brown or dark brown; antennomeres 1–6, 8, and apical 2/5 of antennomere 11 brown; antennomeres 7, 9, 10, and basal 3/5 of antennomere 11 a little darker; legs brownish; all tarsi slightly paler than remaining parts of legs; mesoventrite, metaventrite, and abdominal ventrites brown.

Body 2.4–2.8 mm in length, ca. 1.6× as long as wide.

Head ca. 1.8× as wide as long, ca. 0.53× as long as and 0.56× as wide as pronotum, densely and very minutely punctate ( Fig. 13A View Fig ), usually bearing some large punctures ( Fig. 13A View Fig ); antennomeres 1–5 each longer than wide; antennomere 11 about as long as wide; remaining antennomeres each wider than long; antennomere 11 oval ( Fig. 13C View Fig ); relative lengths of antennomeres 2 to 11 as follows: 4.0: 4.0: 1.3: 1.5: 1.2: 3.0: 1.0: 3.0: 3.0: 4.7.

Pronotum ca. 1.7× as wide as long, ca. 0.48× as long as and 0.84× as wide as elytra, widest near base, simply and very feebly curved at posterior margin, distinctly and very minutely punctate, punctation same as that on head ( Fig. 13A View Fig ).

Scutellum very minutely punctate.

Elytra ca. as long as wide in dorsal view, widest ca. at basal 1/3 ( Fig. 13A View Fig ), not transversely strigose; each elytron bearing nine rows of punctures with small number of punctures, with moderate number of very fine punctures between rows ( Fig. 13D View Fig ); row 9 invisible in dorsal view, subhumeral row ca. as long as 1/3 of elytral length ( Fig. 13B View Fig ); elytral rows composed of minute but larger punctures than those of pronotum ( Fig. 13A View Fig ); sutural stria fine, arising from apex to ca. apical 3/5 of the elytral length.

Metathoracic wings fully developed.

Mesoventrite strongly microreticulate, impunctate, almost glabrous, and with one shallow excavation between median carina and transverse carina ( Fig. 13E View Fig ); median carina of mesoventrite low ( Fig. 13E View Fig ); metaventrite without sexual dimorphism, sparsely pubescent, distinctly microreticulate except for almost smooth middle portion.

Legs showing sexual dimorphism on protarsi, mesotarsi, and metatibiae; protibiae gradually and very feebly widening from base towards apex at internal margins ( Figs. 14E, 14F View Fig ); metafemur robust, and with a small dorsal projection posteroapically ( Figs. 14G, 14H View Fig ).

Male. Tarsomeres 2–4 of protarsi and mesotarsi a little expanded ( Fig. 14A View Fig ); metatibiae weakly curved inwards ( Fig. 14C View Fig ); abdominal sternite 8 feebly curved ( Fig. 15C View Fig ); aedeagus robust ( Figs. 15A, 15B View Fig ); median lobe slightly protuberant apically ( Fig. 15A View Fig ), pointed apically in lateral view ( Fig. 15B View Fig ); each paramere bearing two apical setae and a transparent large lobe at apex ( Fig. 15A View Fig ); inner sac complex ( Fig. 15A View Fig ).

Female. Protarsi and mesotarsi slender ( Fig. 14B View Fig ); metatibiae almost straight ( Fig. 14D View Fig ); abdominal sternite 8 with a spiculum ventrale at a central point of anterior margin ( Fig. 15D View Fig ); coxites and stylus as shown in Fig. 15E View Fig .

Differential diagnosis. Leiodes yoshidai sp. nov. is similar to L. babai Nakane, 1989 in having relatively minute elytral punctures, but may be distinguished from it by having a relatively small body (2.4–2.8 mm), the aedeagus relatively robust in dorsal view ( Fig. 15A View Fig ), and each paramere with a large transparent lobe ( Fig. 15A View Fig ). In contrast, L. babai has a relatively large body (2.7–3.0 mm), relatively slender aedeagus ( Fig. 9A View Fig ), and parameres with small lobes ( Fig. 9A View Fig ). Moreover, L. yoshidai sp. nov. is also similar to L. subtilis ( Reitter, 1885) inhabiting Central Asia and the Russian Far East in having elytra with the rows composed of minute punctures, but can be separated from it by having a low median carina of the mesoventrite ( Fig. 13E View Fig ). In contrast, L. subtilis has a high mesoventral carina.