Intybia takaraensis (Nakane, 1955)

Ikeda, Hiroshi & Yoshitomi, Hiroyuki, 2017, Revision of the genus Intybia (Coleoptera, Malachiidae) from Japan, European Journal of Taxonomy 331, pp. 1-31 : 23-25

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.

Figures

Fig. 1. Dorsal habitus Intybia spp., ♂. A. Intybia histrio (Kiesenwetter, 1874). B. I. tsushimensis (Satô & Ohbayashi, 1968). C. I. donan sp. nov., holotype. D. I. pelegrini pelegrini (Pic, 1910). E. I. niponica (Lewis, 1895). F. I. takaraensis (Nakane, 1955). G. I. kishiii (Nakane, 1955). H. I. kawasakii (Nakane, 1956), holotype. Scales = 1.0 mm.

Fig. 2. Dosal habitus of Intybia spp., ♀. A. Intybia histrio (Kiesenwetter, 1874). B. I. tsushimensis (Satô & Ohbayashi, 1968). C. I. donan sp. nov., paratype. D. I. pelegrini pelegrini (Pic, 1910). E. I.niponica (Lewis, 1895). F. I.takaraensis (Nakane, 1955).G. I. kishiii (Nakane, 1955). H. I. kawasakii (Nakane, 1956), paratype. Scale bars = 1.0 mm.

Fig. 4. Right antennae of Intybia spp., ♂. A. Intybia histrio (Kiesenwetter, 1874). B. I. tsushimensis (Satô & Ohbayashi, 1968). C. I. donan sp. nov. D. I. pelegrini pelegrini (Pic, 1910). E. I. niponica (Lewis, 1895). F. I. takaraensis (Nakane, 1955). G. I. kishiii (Nakane, 1955). H. I. kawasakii (Nakane, 1956). Scale bars = 0.2 mm.

Fig. 5. Right antennae of Intybia spp., ♀. A. Intybia histrio (Kiesenwetter, 1874). B. I. tsushimensis (Satô & Ohbayashi, 1968). C. I. donan sp. nov. D. I. pelegrini pelegrini (Pic, 1910). E. I. niponica (Lewis, 1895). F. I. takaraensis (Nakane, 1955). G. I. kishiii (Nakane, 1955). H. I. kawasakii (Nakane, 1956). Scale bars = 0.2 mm.

Fig. 6. SEM photographs of right male antennomere III of Intybia spp. A. Intybia histrio (Kiesenwetter, 1874). B. I. tsushimensis (Satô & Ohbayashi, 1968). C, H. I. donan sp. nov., showing projection (H). D. I. pelegrini pelegrini (Pic, 1910). E. I. niponica (Lewis, 1895). F. I. takaraensis (Nakane, 1955). G. I. kishiii (Nakane, 1955).

Fig. 8. Endophallus of Intybia spp., A. Intybia histrio (Kiesenwetter, 1874). B. I. pelegrini pelegrini (Pic, 1910). C. I. takaraensis (Nakane, 1955). D. I. kishiii (Nakane, 1955). Abbreviations: gp = gonoporal piece; l = ligula; sgp = semi-gonoporal piece; sp = spinous plate. Scales = 0.1 mm.

Fig. 9. Spinous area and spinous plate of Intybia spp. A. Intybia histrio (Kiesenwetter, 1874). B. I. tsushimensis (Satô & Ohbayashi, 1968). C. I. donan sp. nov. D. I. pelegrini pelegrini (Pic, 1910). E. I. niponica(Lewis,1895). F. I. takaraensis (Nakane, 1955). G. I. kishiii (Nakane, 1955).Abbreviations: sa = spinous area; sp = spinous plate. Scales = 0.1 mm.

Fig. 10. Endophallic sclerites of Intybia spp. A. Intybia histrio (Kiesenwetter, 1874). B. I. tsushimensis (Satô & Ohbayashi, 1968). C. I. donan sp. nov. D. I. pelegrini pelegrini (Pic, 1910). E. I. niponica (Lewis, 1895). F. I. takaraensis (Nakane, 1955). G. I. kishiii (Nakane, 1955). Abbreviations: gp = gonoporal piece; l = ligula; sgp = semi-gonoporal piece. Scale bars = 0.1 mm.

Fig. 11.Map showing thedistribution of Intybia spp.A.The histriogroup:●:Intybia histrio(Kiesenwetter, 1874), ▲: I. tsushimensis (Satô & Ohbayashi, 1968), ■: I. donan sp. nov.). B. The pelegrini group: ○: I. pelegrini (Pic, 1910), △: I. niponica (Lewis, 1895), □: I. takaraensis (Nakane, 1955), ×: I. kishiii (Nakane, 1955), +: I. kawasakii (Nakane, 1956).