Intybia Pascoe, 1866

Ikeda, Hiroshi & Yoshitomi, Hiroyuki, 2017, Revision of the genus Intybia (Coleoptera, Malachiidae) from Japan, European Journal of Taxonomy 331, pp. 1-31 : 3-4

publication ID	https://doi.org/ 10.5852/ejt.2017.331
publication LSID	lsid:zoobank.org:pub:3FD5D922-B91F-42BB-9D7B-7DFB98841732
DOI	https://doi.org/10.5281/zenodo.3848094
persistent identifier	https://treatment.plazi.org/id/4A5D7055-4501-FFE1-FD92-B869FAFAFC11
treatment provided by	Carolina
scientific name	Intybia Pascoe, 1866
status

Treatment

Genus Intybia Pascoe, 1866

Intybia Pascoe, 1866: 448 [

type species: Intybia guttata Pascoe, 1866 ].

Notes

The genus Intybia belongs to the tribe Apalochrini of the subfamily Malachiinae together with the related genera Laius and Dicranolaius ( Champion, 1921) . The genus Intybia is characterized as follows: elytra with yellowish to reddish fascia or maculation in most species (vs fully black with bluish luster in Laius ); antennomere II short; antennomere III in male modified; simple protarsus and protibia in male (vs two tarsal combs in protarsi V in Dicranolaius ); front legs slender (vs male protibia of Laius thickened basally and inside of basal area distinctly hollow); aedeagal apex round in Japanese species (vs concave in most Laius species); endophallic structure composed of 1–3 sclerites (gonoporal piece, semi-gonoporal piece, ligula, and 0–2 spinous plate(s)) (Evers 1994; Asano & Kawashima 2010; Asano 2015).

Gender

Feminine.

Key to the Japanese species of the genus Intybia

1. Elytra with fascia, but sometimes fascia divided into two spots by suture; distributed in Hokkaido to Ryukyu ……………………………………………………………………………………………2

– Elytra with four spots;distributed in Ryukyu (Yonaguni-jima)……………………… I.donan sp. nov.

2. Elytral fascia widened at suture ( Figs 1 View Fig D–G; 2D–G) ……………………………………………… 3

– Elytral fascia narrowed at suture, or divided into two spots by suture ( Figs 1A, B, H View Fig ; 2 View Fig A–B, H)..6

3. Fore legs fully yellow; head wide, about 0.5–0.9 in HL/HW; eyes prominent; endophallus with spinous plate ( Figs 8 View Fig B–C, 9D–F) …………………………………………………………………………… 4

– Fore legs fully black; head narrow, about 0.9–1.2 in HL/HW; eyes not prominent; spinous plate absent ( Figs8D View Fig , 9G View Fig )………………………………………………………………… I.kishiii (Nakane,1955)

4. Body oval; femur black; endophallus with one spinous plate ( Figs 8C View Fig , 9 View Fig E–F)…………… 5

– Body elongate; femur yellow; endophallus with two spinous plates ( Figs 8B View Fig , 9D View Fig )………………… …………………………………………………………………… I. pelegrini pelegrini ( Pic, 1910)

5. Elytral fascia clearly widened at suture; body black; male antennomere III broad bean-like shaped; female apterous…………………………………………………………… I. niponica ( Lewis, 1895)

– Elytral fascia slightly widened at suture; body black with bluish luster; male antennomere III heartlike shaped; female hind wing present ……………………………… I. takaraensis (Nakane, 1955)

6. Fore legs fully yellow; elytra with a yellow or divided into two spots by suture ………………………7

– Fore legs fully black; elytra with a fascia ……… I. tsushimensis (Satô & Ohbayashi, 1968)

7. Elytral fascia varies in development ( Fig. 3 View Fig ), sometimes interrupted by suture; antennae yellow; male antennomere III fusiform, with an oval funnel-shaped on the outer edge, with a twisted projection near base; male frons yellow in apical half ……………………… I. histrio ( Kiesenwetter, 1874)

– Elytral fascia interrupted by suture; antennomeres V–XI infuscate; male antennomere III ear-like shaped; male frons fully black ……………………………………… I. kawasakii ( Nakane, 1956)