Intybia takaraensis
Creators: name: Ikeda, Hiroshi
name: Yoshitomi, Hiroyuki
Publisher: name: Zenodo
Year: 2017
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Melyridae
Intybia
Intybia takaraensis

description: Intybia takaraensis (Nakane, 1955)
[Japanese name: Ruri-ki-obi-jôkai-modoki]
Figs 1F, 2F, 4F, 5F, 6F, 8C, 9F, 10F, 11B
Laius takaraensis Nakane, 1955b: 376 [type locality: Takarajima Is., Tokara Isls.].
Laius takaraensis – Nakane 1957: 13, fig. 4. — Nakane 1963: 186, pl. 93, fig. 13. — Nakane 1983: 164. — Satô 1985: 164, pl. 26, fig. 7. — Satô 1989: 366.
Intybia takaraensis – Wittmer 1997: 181, abb. 39–46. — Mayor 2007: 417 [catalogued]. — Yoshitomi & Hayashi 2011: 19. — Tshernyshev 2012: 575–587, table 1. — Plonski 2013: 66.
Laius tokaraensis Nakane 1956: 33 [misspelling].
Diagnosis
Coloration of body black with bluish luster on head, pronotum and elytra; elytra with a wide yellow fascia; antennomere III heart-like shape; gonoporal piece straight, slender, slightly curved basally; semigonoporal piece and ligula absent; spinous area (Fig. 9F) densely covered with long spines and with oval spinous plate.
Material examined
JAPAN, Honshu: Gifu Pref.: 1 ♂, Gifu, Japan, 25 Jun. 1947, D. Matusita leg. (EUMJ). – Aichi Pref.: 2 ♀♀, Yahagi-gawa, Murataka, Anjô-shi, 23 Sep. 1998 and 17 Jul. 1999, M. Hasegawa leg. (EUMJ). – Mie Pref.: 1 ♀, Yokkaichi, 5 Jun. 1979, H. Nagai leg. (EUMJ); 1 ♂, same data, Aug. 1978, H. Nagai leg. (EUMJ); 1 ♀, Yokkaichi, Saburô-chô, 12 Jul. 1982, B. Tanaka leg. (EUMJ). – Shimane Pref.: 1 ♂, 5 ♀♀, Tsunozu, Gotsu, 19 Aug. 2015, H. Yoshitomi leg. (EUMJ); 1 ♀, st. 24, 12 Jul. 2012, H. Yoshitomi leg. (EUMJ).
JAPAN, Shikoku: Ehime Pref.: 1 ♂, Nakajima, 13 Oct. 1957, F. Takechi leg. (EUMJ); 11 ♀♀, Nishihabumachi, Matsuyama-shi, riverside of Shigenobu-gawa, 33°48′22.61′′ N, 132°41′59.42′′ E, 4 Sep. 2015, H. Ikeda leg. (EUMJ); 2 ♂♂, 10 ♀♀, same data, 10 Sep. 2015, H. Ikeda leg. (EUMJ); 2 ♂♂, 3 ♀♀, Shioya-kaigan, Kitagawara, Masaki-chô, Iyo-gun, estuary of Shigenobu-gawa, 20 Apr. 2015, H. Ikeda leg. (EUMJ).
JAPAN, Tokara Isls.: Takarajima: 5 ♂♂, 1 ♀, Takara-jima, 3 Jul. 1960, M. Satô leg. (EUMJ); 1 ♀, same data, 3 Jun. 1962, M. Satô leg. (EUMJ); 1 ♀, same data, 4 Jun. 1962, M. Satô leg. (EUMJ); 3 ♂♂, 2 ♀♀, same data, 5 Jun. 1962, M. Satô leg. (EUMJ); 1 ♀, same data, 6 Jun. 1962, M. Satô leg. (EUMJ); 1 ♂, 4 ♀♀, same data, 7 Jun. 1962, M. Satô leg. (EUMJ); 1 ♂, 2 ♀♀, same data, 8 Jun. 1962, M. Satô leg. (EUMJ).
JAPAN, Amami-Ôshima: Amami Isls.: Tokunoshima: 6 ♂♂, 10 ♀♀, Senma Beach, 20 Jun. 2001, M. Satô leg. (EUMJ). 1 ♂, Koniya, 20 Apr. 1954, S. Takagi leg. (SEHU).
Redescription
Male
Body (Fig. 1F) oval, shining, sparsely covered with fulvous hairs. Coloration of head, pronotum and elytra black with bluish luster; antennae yellow, with apical 8 or 9 segments black; elytra with a wide yellow fascia just before the middle; tibiae, trochanters, apex of coxae, fore femora; apical portion of middle femora yellow.
Head moderately densely punctate; eyes oval and prominent laterally; HL/HW 0.62–0.82 (0.69). Antennae (Fig. 4F) short, reaching base of elytra; antennomere I stout; antennomere III (Fig. 6F) heartlike shape, deeply concave in dorso-mesal portion; L/W = 1.12; approximate ratio of each antennomere (n = 1) as 9.7: 1.0: 12.7: 2.3: 2.3: 2.3: 3.0:2.7:2.7: 2.7: 4.3. Pronotum transverse, broader than head; sides subparallel in the anterior half, then sinuately and strongly curved posteriorly; base slightly but broadly emarginated; surface rather densely punctate at the sides, rugosely so before hind angles, more or less sparsely and finely punctate in middle; PW/PL 1.13–1.40 (1.22). Elytra oval, moderately convex, broadened posteriorly, densely punctate at lateral parts; EL/EW 1.15–1.48 (1.36); EL/PL 2.39–3.07 (2.68); EW/PW 1.48–1.83 (1.60); TL/EW 1.92–2.42 (2.28). Aedeagus about 0.73 mm in AL. Gonoporal piece (Figs 8C, 10F) straight, slender, slightly curved in basally, 0.44 mm in GL; GL/AL 0.60. Semigonoporal piece and ligula absent. Spinous area (Fig. 9F) densely covered with long spines; spinous plate large and ovate.
Female
Similar to male in general appearance (Fig. 2F); coloration of antennae yellow, with apical 7 or 8 segments black; HL/HW 0.54–0.68 (0.61); PW/PL 1.14–1.37 (1.24); EL/EW 1.22–1.53 (1.38); EL/ PL 2.60–3.03 (2.79); EW/PW 1.5–1.81 (1.63); TL/EW 1.99–2.41 (2.22). Antennae (Fig. 5F) long; antennomere III long, expanded laterally, shallowly concave in dorsal part; L/W = 2.00; approximate ratio of each antennomere (n = 1) as 9.7: 1.0: 6.7:3.0:3.0: 3.3: 3.3: 3.3: 3.3: 2.7:5.0.
Measurements
Male (n = 18): TL 2.97–3.54 (3.18) mm; HL 0.50–0.62 (0.56) mm; HW 0.73–0.91 (0.81) mm; PW 0.77–1.03 (0.87) mm; PL 0.60–0.82 (0.72) mm; EL 1.67–2.14 (1.90) mm; EW 1.27–1.70 (1.40) mm.
Female (n = 20): TL 2.78–3.26 (3.01) mm; HL 0.39–0.52 (0.47) mm; HW 0.71–0.85 (0.77) mm; PW 0.75–0.95 (0.83) mm; PL 0.62–0.75 (0.67) mm; EL 1.73–2.04 (1.87) mm; EW 1.17–1.58 (1.36) mm.
Distribution (Fig. 11B)
Japan (Honshu, Shikoku, Kyushu, Shôdo-shima, Takara-jima, Tokuno-shima [NR], Amami-Ôshima [NR]); China (Fujian, NE China), Russia (Primorye, Wrangel Is.).
Remarks
This species is closely similar to Intybia niponica (Lewis, 1895), and differs from it in the coloration of the body with a bluish luster and the shape of the male antennomere III.
Biological notes
This species inhabits beach plant communities or grasslands areas near large rivers.
description: Published as part of Ikeda, Hiroshi & Yoshitomi, Hiroyuki, 2017, Revision of the genus Intybia (Coleoptera, Malachiidae) from Japan, pp. 1-31 in European Journal of Taxonomy 331 on pages 23-25, DOI: 10.5852/ejt.2017.331, http://zenodo.org/record/3829776