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

description: 20. Leiodes kamezawai sp. nov.
Japanese name: Amami-ô-tamakinokomushi (Figs. 1, 61–63, 116)
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) and usually bearing some large punctures (Fig. 61A); 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); 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).
Scutellum distinctly punctate.
Elytra ca. 1.1× as long as wide in dorsal view, widest ca. at basal 1/4 (Fig. 61A), 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); row 9 almost straight, subhumeral row absent (Fig. 61B); rows composed of punctures larger than those of pronotum (Fig. 61A); 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); median carina of mesoventrite low (Fig. 61E); 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).
Male. Middle portion of metaventrite densely and finely pubescent (Fig. 61F); tarsomeres 2–4 of protarsi and mesotarsi a little expanded (Fig. 62A); metafemur slender, triangularly protuberant ca. at midlength of posterior margin (Fig. 62C), bearing large dorsal projection posteroapically (Fig. 62G); metatibiae slender, curved inwards, bearing some very tiny spines at internal margins (Fig. 62C); abdominal sternite 8 moderately curved (Fig. 63C); aedeagus relatively thick (Figs. 63A, 63B); median lobe simply styloid in dorsal view (Fig. 63A), feebly curved in lateral view (Fig. 63B); each paramere slender, distinctly expanded at about basal 2/5, bearing two apical setae (Fig. 63A).
Female. Middle portion of metaventrite sparsely and finely pubescent (Fig. 61G); protarsi and mesotarsi slender (Fig. 62B); metafemur relatively robust, weakly curved along posterior margins (Fig. 62D), with moderate dorsal projection posteroapically (Fig. 62H); metatibiae almost straight and relatively robust (Fig. 62D); abdominal sternite 8 with spiculum ventrale at central point of anterior margin (Fig. 63D); coxites and stylus as shown in Fig. 63E.
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) and the male metatibiae distinctly curved (Fig. 62C). In contrast, L. okawai has antennomere 11 clearly narrower than antennomere 10 (Fig. 64C) and male metatibiae feebly curved (Fig. 65C). 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). In contrast, L. nikodymi has the median lobe protuberant apically.
Etymology. The species is dedicated to Mr. Hiromu Kamezawa who kindly offered valuable specimens of Leiodes used in this study.
Distribution. Japan: Ryukyus (Amami-Ôshima Island).
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 94-98, DOI: 10.5281/zenodo.4272467