Leiodes shuheii, 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 : 90-94

publication ID

https://doi.org/ 10.5281/zenodo.4272467

DOI

https://doi.org/10.5281/zenodo.4339417

persistent identifier

https://treatment.plazi.org/id/03E98224-325D-0708-76F2-4188FD24A5E8

treatment provided by

Felipe

scientific name

Leiodes shuheii
status

sp. nov.

19. Leiodes shuheii View in CoL sp. nov.

Japanese name: Sakishima-kuromon-ô-tamakinokomushi ( Figs. 58–60 View Fig View Fig View Fig , 115 View Fig )

Type locality. Japan, Ryukyus, Yonaguni Is., Mt. Kubura-dake.

Type material. JAPAN: RYUKYUS: HOLOTYPE, ♂, Yonaguni Is., Mt. Kubura-dake , 15.–19.iii.2005, S. Nomura leg. ( FIT) ( MNHAH). PARATYPES: 1 ♂, same data as holotype ; 5 ♀♀, Yonaguni Is., Mt. Inbi-dake 15.–19.iii.2005, S. Nomura leg. ( FIT) ( FUFJ) .

Diagnosis. Body 2.4–2.8 mm long, ca. 1.9× as long as wide. Elytra bicolored. Each elytron with nine distinct rows of punctures and a subhumeral row as long as ca. 1/4 or 1/3 of elytral length. Mesoventrite without distinct excavation between median carina and transverse carina. Median carina of mesoventrite low. Mesotibiae without distinct sexual dimorphism. Metafemora showing sexual dimorphism. Male metatibiae feebly curved. Female abdominal sternite 8 with a spiculum ventrale.

Description. Measurements of holotype: Body length 2.8 mm; head 0.50 mm in length and 0.78 mm in width; pronotum 0.75 mm in length and 1.2 mm in width; elytra 1.7 mm in length and 1.4 mm in width.

Coloration. Dorsum shining; head brown; pronotum yellowish brown or brown ( Figs. 58C, 58D View Fig ); elytra bicolored, yellowish brown with black spots near elytral suture and lateral margins ( Figs. 58C, 58D View Fig ); antennomeres 1–6 brown; antennomere 8 dark reddish brown; antennomeres 7, 9, 10, and basal 3/5 of antennomere 11 blackish brown; apical 2/5 of antennomere 11 light brown; legs light brown or brown; procoxae, metacoxae and all trochanters a little darker than other parts; mesoventrite, metaventrite, and abdominal ventrites light brown.

Body 2.4–2.8 mm in length, ca. 1.9× as long as wide.

Head ca. 1.6× as wide as long, ca. 0.64× as long as and 0.61× as wide as pronotum, distinctly and densely punctate ( Fig. 58A View Fig ), usually bearing some large punctures ( Fig. 58A View Fig ); antennomeres 1–3 each longer than wide; antennomeres 4 and 11 each about as long as wide; remaining antennomeres each wider than long; antennomere 11 oval ( Fig. 58E View Fig ); relative lengths of antennomeres 2 to 11 – 3.0: 3.1: 1.7: 1.4: 1.3: 2.9: 1.0: 3.9: 3.0: 5.0.

Pronotum ca. 1.7× as wide as long, ca. 0.44× as long as and 0.90× as wide as elytra, widest near base, simply and very feebly curved at posterior margin, distinctly and densely punctate, punctation similar to that on head ( Fig. 58A View Fig ).

Scutellum distinctly punctate.

Elytra ca. 1.2× as long as wide in dorsal view, widest ca. at basal 1/3 ( Fig. 58A 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. 58F View Fig ); row 9 invisible in dorsal view, subhumeral row ca. as long as 1/3 of elytral length ( Fig. 48B View Fig ); rows composed of punctures larger than those on pronotum ( Fig. 58A 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, without distinct excavation between median carina and transverse carina ( Fig. 58G View Fig ); median carina of mesoventrite low ( Fig. 58G View Fig ); metaventrite without sexual dimorphism, sparsely pubescent, distinctly microreticulate except for almost smooth middle portion.

Legs sexually dimorphic on protarsi, mesotarsi, metafemora, and metatibiae; protibiae gradually and very feebly widening from base towards apex ( Figs. 59E, 59F View Fig ).

Male. Tarsomeres 2–4 of protarsi and mesotarsi a little expanded ( Fig. 59A View Fig ); metafemur with a large dorsal projection posteroapically ( Fig. 59G View Fig ); metatibiae feebly curved inwards, with some tiny spines along internal margins ( Fig. 59C View Fig ); abdominal sternite 8 weakly curved ( Fig. 60C View Fig ); aedeagus relatively robust ( Figs. 60A, 60B View Fig ); median lobe distinctly protuberant at apex in dorsal view ( Fig. 60A View Fig ), bluntly pointed apically in lateral view ( Fig. 60B View Fig ); each paramere bearing two apical setae and a transparent small apical lobe, feebly expanded ca. in apical 1/ 7 in dorsal view ( Fig. 60A View Fig ).

Female. Protarsi and mesotarsi slender ( Fig. 59B View Fig ); metafemur with a small dorsal projection posteroapically ( Fig. 59H View Fig ); metatibiae almost straight ( Fig. 59D View Fig ); abdominal sternite 8 with spiculum ventrale at central point of anterior margin ( Fig. 60D View Fig ); coxites and stylus as shown in Fig. 60E View Fig .

Morphological variability. Leiodes shuheii sp. nov. shows intraspecific variation of dorsal coloration ( Figs. 58C, 58D View Fig ). The differences do not correlate to body size.

Differential diagnosis. Leiodes shuheii sp. nov. is very similar to L. naraharai sp. nov. in the morphology of the aedeagus, but can be distinguished from it by having the elytra with relatively large black spots ( Figs. 58C, 58D View Fig ) and each paramere bearing a transparent small lobe at the apex ( Fig. 60A View Fig ). In contrast, L. naraharai sp. nov. has the elytra with slender black stripes ( Figs. 55C, 55D View Fig ) and each paramere pubescent at the apex ( Fig. 57A View Fig ). Leiodes shuheii sp. nov. resembles the Nepalese species L. fuscosuturalis Švec, 2008 in the dorsal coloration, but can be separated from it by having an almost unicolor pronotum and the median lobe distinctly protuberant apically ( Fig. 60A View Fig ), whereas the pronotum is maculate and the median lobe is simply triangular at the apex in L. fuscosuturalis .

Etymology. The species name is dedicated to Dr. Shûhei Nomura who kindly donated me many valuable specimens of Leiodes used in this study.

Distribution. Japan: Ryukyus (Yonaguni Island).

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Coleoptera

Family

Leiodidae

Genus

Leiodes

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