Intybia pelegrini pelegrini ( Pic, 1910 )

Ikeda, Hiroshi & Yoshitomi, Hiroyuki, 2017, Revision of the genus Intybia (Coleoptera, Malachiidae) from Japan, European Journal of Taxonomy 331, pp. 1-31 : 20-21

Intybia pelegrini pelegrini ( Pic, 1910)

[Japanese name: Kiashi-obi-jôkai-modoki]

Figs 1D , 2D , 4D , 5D , 6D , 8D , 9D , 10D , 11B

Laius pelegrini Pic, 1910: 62 [type locality: Yedo, Japon].

Laius pelegrini – Champion 1921: 331.— Pic 1921: 19.— Nakane 1983: 164.

Intybia pelegrini pelegrini – Plonski 2013: 66.

Laius pellegrini [misspelling] – Greiner 1937: 152. — Nakane 1957: 13, fig. 2. — Nakane 1963: 186, pl. 93, fig.14. — Satô 1985: 165, pl. 26, fig. 10. — Satô 1989: 366.

Intybia pellegrini pellegrini [misspelling]: Wittmer 1997: 181, figs 34–36. — Mayor 2007: 417 [catalogued]. — Yoshitomi & Hayashi 2011: 19.

Diagnosis

Elytra with a wide yellow fascia just before the middle, which is widened on lateral margin, and indented posteriorly; antennomere III half crescent-like shaped, excavate on upper surface; gonoporal piece straight, slender, slightly curved basally; semi-gonoporal piece and ligula absent, with two spinous plates.

Material examined

JAPAN, Honshu: Fukushima Pref.: 1 ♀, Abukuma-gawa, 22 Aug. 1980, S. Ohmomo leg. ( EUMJ). – Tochigi Pref.: 1 ♂, Tochigi-shi, Watarase-yusuichi, 22 Sep. 2014, H. Suenaga leg. ( HSJ). – Chiba Pref.: 1 ♀, Narashino, 13 Jun. 1951, H. Hattori leg. ( EUMJ). – Saitama Pref.: 3 ♀♀, Toda-shi, Niizo, 19 Jun. 1986, M. Hasegawa leg. ( EUMJ). – Kanagawa Pref.: 1 ♀, Tsukuihama, 2 Aug. 1985, N. Ohbayashi leg. ( EUMJ). – Niigata Pref.: 2 ♀♀, Echigo, Miomote, 20 Jul. 1959, K. Baba leg. ( EUMJ). – Shizuoka Pref.: 1 ♀, estuary of Fuji-kawa, Kambara-gun, Fukiageno-hama, 31 Aug. 2008, Y. Satô leg. ( EUMJ). – Aichi Pref.: 1 ♂, (already reported by Wittmer 1997), Chita-shi, Minamihama-chô, 15 Jul. 1982, B. Tanaka leg. ( EUMJ); 1 ♀ (18 Jul. 1998), 1 ♀ (23 May 1999), Yahagi-gawa, Murataka, Anjô-shi, M. Hasegawa leg. ( EUMJ). – Gifu Pref.: 2 ♀♀, Tokuyama Dam, 18 Jul. 1992, M. Hibino leg. ( EUMJ). – Okayama Pref.: 1 ♂, Hyakken-gawa, Okayama-shi, Fujiwara-chô, 29 Sep. 2013, H. Suenaga leg. ( HSJ).

JAPAN, Shikoku: Ehime Pref.: 1 ♂ (misidentified and reported as Lajus niponicus by Miyatake & Kobayashi 1950), Omogokei, 24 Jul. 1947, M. Miyatake leg. ( EUMJ); 1 ♂ (already recorded by Yano 1957), Onogahara, Higashiuwa, 4 Aug. 1955, Y. Wake leg. ( EUMJ); 2 ♂♂, 1 ♀, Seiyo-shi, Uwa-chô, Yamada, 19 Jun. 2004, T. Kurihara et al. leg. ( EUMJ); 1 ♂, Zenoji, Matsuyam-shi, Shin-ike, 7 Jun. 2006, J. Ogawa leg. ( EUMJ); 1 ♂, Onishi-chô, Shin-chô, Imabari-shi, Kojin-ike, 6 Jul. 2013, R. Okano leg. ( EUMJ); 1 ♂, 1 ♀, Sugezawa-machi, Matsuyama-shi, 17 Jul. 2014, T. Iwata leg. ( EUMJ); 1 ♂, Nishihabu-machi, Matsuyama-shi, riverside of Shigenobu-gawa, 33°48′22.61′′ N, 132°41′59.42′′ E, 4 Sep. 2015, H. Ikeda leg. ( EUMJ); 1 ♀, Tanouwa-gata, Tanbara-chô, Saijô-shi, 15 Jul. 2010, S. Matsuo leg. ( EUMJ). – Kochi Pref.: 2 ♀♀, Okuna, Ino-chô, Uzi-gawa, 6 Jul. 2002, T. Kurihara leg. ( EUMJ); 2 ♀♀, Nishimachi, Noichi-chô, 13 Jul. 2002, M. Sakai leg. ( EUMJ).

JAPAN, Tsushima Is.: 1 ♀ (already reported by Satô & Ohbayashi (1968)), Izuhara, 21 Aug. 1966, S. Nomoto leg. ( EUMJ); 1 ♀, Kechi Dam, 29 Jul. 1979, M. Kotani leg. ( EUMJ).

Redescription

Male

Body ( Fig. 1D ) slightly elongate, with gray pubescence. Coloration of head, antennomeres I–III, pronotum, and elytra black; elytral fascia and legs yellow.

Head densely punctate, rugosely so in basal part; eyes oval, moderately prominent; HL/HW 0.65–0.84 (0.72). Antennae ( Fig. 4D ) long, reaching base of elytra; antennomere III ( Fig 6D ) half crescent-like shaped, deeply concave in dorso-mesal part; L/W = 1.49; approximate ratio of each antennomere (n = 1) as 5.8: 1.0: 11.2:1.7: 1.8: 2.0: 2.2: 2.2: 2.5:2.2:2.8. Pronotum rather densely punctate in lateral parts; PW/PL 0.97–1.09 (1.04). Elytra oblong-ovate, slightly broadened posteriorly, densely punctured; elytral fascia wide, situated just before the middle, widened at suture and lateral margins; EL/EW 1.27–1.69 (1.50); EL/PL 2.55–2.79 (2.65); EW/PW 1.46–2.05 (1.70); TL/EW 2.07–2.79 (2.46). Aedeagus about 1.00 mm in AL. Gonoporal piece ( Figs. 8B , 10D ) straight, slender, slightly curved basally, 0.52 mm in GL; GL/AL 0.52. Semi-gonoporal piece and ligula absent. Spinous area ( Fig. 9D ) densely covered with long spines, with two small spinous plates.

Female

Similar to male in general appearance ( Fig. 2D ); coloration of antennae yellow, with apical 6 or 7 segments black; HL/HW 0.59–0.85 (0.68); PW/PL 0.96–1.11 (1.04); EL/EW 1.36–1.66 (1.53); EL/ PL 2.5–2.84 (2.68); EW/PW 1.55–1.89 (1.69); TL/EW 2.14–2.79 (2.48). Antennae ( Fig. 5D ) long; antennomere III oblong, distinctly expanded laterally, shallowly concave in dorsal portion; L/W = 2.9; approximate ratio of each antennomere (n = 1) as 6.2: 1.0: 5.8: 2.4:2.4: 2.2: 2.2: 2.4: 2.4: 2.4:3.6.

Measurements

Male (n = 11): TL 3.29–3.93 (3.58) mm; HL 0.54–0.69 (0.58) mm; HW 0.75–0.86 (0.80) mm; PW 0.80–0.94 (0.86) mm; PL 0.77–0.90 (0.82) mm; EL 1.97–2.39 (2.18) mm; EW 1.27–1.64 (1.46) mm.

Female (n = 18): TL 3.58–4.18 (3.88) mm; HL 0.50–0.72 (0.59) mm; HW 0.80–0.92 (0.87) mm; PW 0.82–1.00 (0.93) mm; PL 0.82–1.00 (0.89) mm; EL 2.20–2.56 (2.39) mm; EW 1.40–1.87 (1.57) mm.

Distribution ( Fig. 11B )

Japan (Honshu, Shikoku, Kyushu, Tsushima); Russia (Kunashir Is.).

Remarks

This species is distinct in having a slender body shape, a characteristic coloration, a special shape of the male antennomere III, and two spinous plates.

Wittmer (1997) described the subspecies, I. pelegrini longior Wittmer, 1997 , for the Korean population, and this subspecies differs from the nominotypical subspecies (= Japanese population) by the male antennomere III more elongate by 15–20% ( Wittmer 1997).

Biological notes

This species inhabits grassland 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).