Kogane, (22): 55-58, July, 2019

A new species of the family Glaresidae - the first species from Japan (Coleoptera, )

Teruo Ochi1, Kimio Masumoto2, Showtaro Kakizoe3 and Takeharu Yanagi4

1Kôhûdai 5-21-6, Toyono-chô, Toyono-gun, Osaka, 563-0104 Japan 2Kamezawa 3-chome, 14-13-1001, Sumida-ku, Tokyo, 130-0014 Japan 3Entomological Laboratory, Graduate School of Biosource and Bioenvironmental Science, Kyushu University, Motooka 744, Nishi-ku, Fukuoka, 819-0395 Japan 4Okamoto 1-7-2, Kamakura-shi, Kanagawa, 247-0072 Japan

日本からの初記録となるニセコブスジコガネ科ニセコブスジコガネ属の 1 新種

越智 輝雄：〒563-0104 大阪府豊能郡豊能町光風台 5-21-6 益本 仁雄：〒130-0014 東京都墨田区亀沢 3 丁目 14-13-1001 柿添 翔太郎：〒819-0395 福岡県福岡市西区元岡 744 九州大学大学院生物資源環境科学府昆虫学教室 柳 丈陽：〒247-0072 神奈川県鎌倉市岡本 1-7-2

Abstract: A new species of the Glaresis of the family Glaresidae is described from Japan under the name of G. japonensis Ochi, Masumoto, Kakizoe et Yanagi sp. nov. It is the first member of this family recorded from Japan.

Key words: Coleoptera, Scarabaeoidea, Glaresidae, Glaresis, new species, Japan.

According to Král & Bezděk (2016), 22 species and one subspecies of the family Glaresidae, belonging to Scarabaeoidea, are recorded from the Palaearctic Region. Recently, Král et al. (2017) added one new species from China, and briefly reviewed the morphology and biology of this family. We have been examining one glaresid member collected from N. E. Japan for these several years. As a result, we concluded that it is new to science and the first distributional record of Glaresidae from Japan. Therefore, we are going to describe it as a new species in this paper. We would like to express cordial thanks to Mr. Syozou Mizunoya who collected and offered the type specimen. We also thank Dr. David Král, Charles University, Dr. Aleš Bezděk, Biology Centre, Institute of Entomology, Academy of Science, Czech Republic, and Mr. Shinya Kawai, Tokyo, for offering invaluable suggestion, supporting references and material specimens for comparison. We are indebted to Mr. Katsumi Akita, Tsu City., Mr. Hanmei Hirasawa, Nagano Pref., and Dr. Makoto Kiuchi, Tsukuba City, for supporting our present study. The holotype to be designated will be deposited in the National Museum of Nature and Science, Tsukuba, Japan.

Glaresis japonensis sp. nov. (Figs. 1-3) Description of holotype. Male. Length: 3.4 mm (excluding mandibles); width: 1.8 mm. Body oblong-oval, very strongly convex. Dorsal side matt, sparsely clothed with short setae; ventral side also matt, sparsely clothed with similar hairs as those on dorsum. Color almost wholly pale brown, head and pronotum slightly darkened; head with a pair of more darkened round small spots on each side;

5555 Teruo Ochi, Kimio Masumoto, Showtaro Kakizoe & Takeharu Yanagi

Fig. 1. Habitus of Glaresis japonensis sp. nov., male, holotype, in dorsal view. Scale 2 mm. Figs. 2-3. Male aedeagus of Glaresis spp, in dorsal view. 2, Glaresis japonensis sp. nov.; 3, Glaresis rufa Erichson. Scale 0.5 mm.

pronotum with marginal portions and median line darkened, also with two pairs of darkened round spots in medio-lateral portion; mouth parts, antennae and legs slightly paler. Head weakly convex; clypeal apical margin distinctly narrow, about 0.3 times as wide as cephalic width across genae, in reality the edge very transversely grooved in middle and apparently forming very transverse loop externally; genae moderately produced laterad, slightly exceeding eyes, with external margin obtusely angled in front and circumscribing anterior 3/5 of eye; surface slightly micro- sculptured, sparsely scattered with distinct granules, each of which bears a short sub-erect yellowish white seta, genae also similarly granulate, each of the granule also bears similar seta and slightly longer than those on median portion of head. Mandibles relatively long, obtusely toothed at baso-dorsal edge. Antennae with antennal footstalks somewhat short. Pronotum moderately convex, ca. 1.8 times as wide as long (Pl : Pw = 0.8 : 1.4), with a median longitudinal line noticeably strong, deeply and broadly grooved, especially so behind; anterior margin weakly bi-sinuate, with marginal border indefinite; lateral margins strongly narrowed apicad, with marginal line indefinite; anterior angles slightly produced and rounded at apex, posterior ones obtuse; basal margin slightly produced and obtusely angled at middle, with marginal line thinly bordered and seemingly finely serrate by a transverse row of setaceous small punctures; the base also furrowed along marginal line; disc with a transverse and bi-sinuous groove behind anterior margin, and also with two pairs of round or short transverse grooves: a pair of median small sub-ovate ones at near median groove, and a pair of posterior small sub-ovate ones a little behind the preceding ones near lateral margins; surface slightly micro-sculptured and sparsely granulate, each granule bearing a similar short seta as those on head.

5656

A new species of the family Glaresidae from Japan

Elytra very strongly convex, ca. 1.2 times as long as wide (El : Ew = 2.1: 1.8), with a humeral tooth scarcely developed and not well visible in dorsal view; disc with 10 striae and 11 intervals, the striae remarkably broadly grooved, and strial width a little wider than interval width in inner striae; strial punctures dense and very large, each with a deep round bottom, obviously invading both margins of intervals; intervals distinctly narrow, arranged with a single longitudinal row of setigerous granules, each granule somewhat asperate posteriad and bearing a short seta which is slightly longer than those on pronotum. Protibiae rather stout, weakly incurved, with three external teeth, apical 1st tooth fairly long, truncated at distal margin, tooth 2 shorter and broader than tooth 1, broadly triangular, tooth 3 small and triangular, the remaining external margin very weakly serrate: terminal spur of tooth 1 curved ventrad, with apex sharp. Mesotibia relatively slender, with apical tarsomere slightly shorter than the four basal segments combined. Metatibiae noticeably broad, strongly dilated apicad and flattened dorsally, with median external tooth distinctly small, distal end obliquely truncate externally which is also flattened and not tumid. Aedeagus 0.8 mm in total length in dorsal view. Phallobase 0.5 mm in length in dorsal view, slightly broadened apicad. Parameres 0.3 mm in length in dorsal view; each dorsal side with an oblique ridge extending from near baso-inner portion to apico-external portion, basal portion convex and apical portion deplanate. Type series. Holotype: ♂, Japan, Fukushima Pref., Onuma, Showa village, Hakase-Toge Pass, 1300 m alt., 14. VII. 2015, S. Mizunoya leg. Paratype: 1♀, JAPAN, Fukushima, Onuma, Showa-mura, near Hakase-Toge pass, (37˚19´38.86N, 139˚42´45.97E, ca. 920m alt.), 16. VII. 2015, Takeharu Yanagi leg. Distribution. Japan (Northeast Honshu). Etymology. The specific name, japonensis, is given after the collected country, Japan, with a commemorative expression of the first member of the family Glaresidae from this territory. Notes. The present new species is somewhat related to Glaresis rufa Erichson, 1848 from eastern Europe but can be distinguished from G. ru fa (the characteristics of which are mentioned in the following parentheses) by the following characteristics: 1) elytron with striae remarkably broadly grooved, (slightly but more narrowly grooved); 2) elytron with strial width a little wider than interval width in inner striae (as wide as interval width in inner striae); 3) elytron with strial punctures dense and very large (a little sparse and slightly smaller); 4) parameres with an oblique ridge on the dorsal side, which is extending from near baso-inner portion to apico-external portion, and basal portion convex and apical portion deplanate (entirely simply formed, without such an oblique ridge). The present new species also somewhat resembles G. ordosensis Král, Hrůzová, Lu & Bai, 2017, originally described from China (Inner Mongolia, Shaanxi), but can be easily distinguished from G. ordosensis by the body more stout and more convex dorsad, the pronotum longer and roundly narrowed anteriad, base more gently rounded, disc with remarkable patches; the elytra more convex dorsad and laterad, with striate punctures obviously larger, mesotibia simply produced in middle on exterior face, metatibia with more acute external tooth near apex. The paratype specimen was collected by sifting finely fragmented leaf litter and sand accumulated around the root of a tree standing at the bank of a mountain stream. The glaresid- have been known from the sand of seashore or riverside in relatively cool areas of Europe and North America. In Japan, such environments as seashore and riverside have been well investigated by many entomologists and amateur collectors. Nevertheless, no glaresid- has been discovered until now. Therefore, it is a great surprise for us that the present new species of the

5757

Teruo Ochi, Kimio Masumoto, Showtaro Kakizoe & Takeharu Yanagi family Glaresidae have been discovered from Japan. Glaresidae is one of rather ancestral group in Scarabaeoidea (Ahrens et al. 2014; McKenna et al. 2015). Presumably, this old species might have been live as a relict only in restricted mountainous area of North Japan. There are many interesting points to be studied such as its phylogenetic and distributional relationship to its relatives distributed in China, distribution and habitat in Japan, life cycle, etc. At present, we have quite limited information about this beetle. Further investigation is under way to clarify its distribution and biology.

要 約

日本の東北部の山中で採集されたニセコブスジコガネ科ニセコブスジコガネ属の 1 種について検討し た結果，未記載種であることが判明したので，Glaresis japonensis sp. nov. と命名記載した．ニセコブス ジコガネ科の種の記録はこれまでに無く，科レベルでの初記録でもある．

References Ahrens, D., Schwarzer, J. & Vogler, A. P., 2014. The evolution of scarab beetles tracks the sequential rise of angiosperms and mammals. Proceedings of the Royal Society B, 281(20141470): 1-10. Erichson, W. F., 1848. Naturgeschichte des Insecten Deutschland. I. Coleoptera, Scaphidilia, Scarabaeides, Nicolaischen Buchhandlung, Berlin (1847-1848) 1(3):1-968. Král, D., & Bezděk, A., 2016. Glaresidae (p. 58): In: Löbl I. & D. Löbl (Eds.): Catalogue of Palaearctic Coleoptera. Volume 3. Scarabaeoidea – – – – . Revised and updated edition. Brill: Leiden, Boston, 983 pp. Král, D., Hrůzová, L., Lu, Y. & Bai, M., 2017. First records of Glaresidae (Coleoptera) in China, with the description of a new species from Inner Mongolia and Shaanxi. Zootaxa, 4306 (1): 145-150. Mckenna, D. D., Farrell, B. D., Caterino, M. S., Farnum, C. W., Hawks, D. C., Maddison, D. R., Seago, A. E., Short, A. E. Z., Newton, A. F. & Thayer, M. K., 2015. Phylogeny and evolution of and Scarabaeiformia: forest litter as a stepping stone for diversification of nonphytophagous beetles. Systematic Entomology, 40(1): 35-60.

5858