Leiodes yoshidai Hoshina 2012, sp. nov.
Creators: name: Hoshina, Hideto
Publisher: name: Zenodo
Year: 2012
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Leiodidae
Leiodes
Leiodes yoshidai

description: 3. Leiodes yoshidai sp. nov.
Japanese name: Tsurugi-ô-tamakinokomushi (Figs. 6, 13–15, 110)
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), usually bearing some large punctures (Fig. 13A); 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); 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).
Scutellum very minutely punctate.
Elytra ca. as long as wide in dorsal view, widest ca. at basal 1/3 (Fig. 13A), 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); row 9 invisible in dorsal view, subhumeral row ca. as long as 1/3 of elytral length (Fig. 13B); elytral rows composed of minute but larger punctures than those of pronotum (Fig. 13A); 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); median carina of mesoventrite low (Fig. 13E); 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); metafemur robust, and with a small dorsal projection posteroapically (Figs. 14G, 14H).
Male. Tarsomeres 2–4 of protarsi and mesotarsi a little expanded (Fig. 14A); metatibiae weakly curved inwards (Fig. 14C); abdominal sternite 8 feebly curved (Fig. 15C); aedeagus robust (Figs. 15A, 15B); median lobe slightly protuberant apically (Fig. 15A), pointed apically in lateral view (Fig. 15B); each paramere bearing two apical setae and a transparent large lobe at apex (Fig. 15A); inner sac complex (Fig. 15A).
Female. Protarsi and mesotarsi slender (Fig. 14B); metatibiae almost straight (Fig. 14D); abdominal sternite 8 with a spiculum ventrale at a central point of anterior margin (Fig. 15D); coxites and stylus as shown in Fig. 15E.
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), and each paramere with a large transparent lobe (Fig. 15A). In contrast, L. babai has a relatively large body (2.7–3.0 mm), relatively slender aedeagus (Fig. 9A), and parameres with small lobes (Fig. 9A). 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). In contrast, L. subtilis has a high mesoventral carina.
Etymology. This species is dedicated to Mr. Masataka Yoshida, who kindly donated many valuable specimens of Leiodes used in this study to me.
Distribution. Japan: Shikoku (Tokushima and Ehime Prefectures).
description: Published as part of Hoshina, Hideto, 2012, Review of the tribes Sogdini and Leiodini from Japan and North Chishima Islands. Part II. Genera Hydnobius and Leiodes (Coleoptera: Leiodidae), pp. 1-168 in Acta Entomologica Musei Nationalis Pragae (suppl. 1) (suppl. 1) 52 on pages 30-34, DOI: 10.5281/zenodo.4272467