Lasconotus okadai Aoki, 2011

Aoki, Jun-ichi, 2018, Japanese Species of the Genus Lasconotus (Coleoptera: Zopheridae: Colydiinae), with Description of a New Species from Ishigaki-jima Island, the Ryukyu Islands, Species Diversity 23 (1), pp. 69-74 : 70-71

Lasconotus okadai Aoki, 2011

( Figs 2 and 6 )

Bitoma niponia (not of Lewis, 1879): Sasaji 1985: 292, pl. 48, fig. 1.

Lasconotus niponius (not of Lewis, 1879): Aoki 2009a: 124, fig. (p. 125) (in part).

Lasconotus okadai Aoki, 2011: 99 , figs 3, 4; Aoki 2012: 45, fig. 33, 33A, 33B; 2013a: 109, fig. 30; 2013b: 75, fig. 2-37C and D.

Material examined. 1 ex . (JAC-5), Institute of Nature Study , Shirokane-dai, Minato-ku, Tokyo, Japan, 17 May 2012, J . Aoki leg . 1 ex . (JAC-6), Sôgawa-mura , Gihu Prefecture, Japan, 22 June 2003, N . Kanie leg . 1 ex . (JAC-7), Imperial Palace , Tokyo, Japan, 18 May 2011, J . Aoki leg . 1 ex. ♂ (JAC-8, dissected and mounted on slides), the same place to JAC-7, 22 July 2010, J . Aoki leg .; 1 ex . ♂ (JAC-9, dissected and mounted on slides), Tôno-sawa , Hakone-machi, Kanagawa Prefecture, Japan, 29 March 2010, J . Aoki leg .

Diagnosis. Body black, mat, 2.35–2.90 mm in length; pronotum length 0.63–0.77 mm; pronotum width 0.70– 0.78 mm; elytral length 1.70–1.88 mm; elytral width 0.70– 0.80 mm; PW/PL 1.01–1.07; EW/PW 1.00–1.03; EL/EW 2.27–2.43; EL/PL 2.53–2.76. Terminal club of antenna consisting of three segments almost equal in size; third segment longer than fourth one ( Fig. 2 ). Anterior angles of pronotum usually produced, but not so prominently and sometimes rounded; among four longitudinal carinae on pronotum, two admedian ones broad and dull; elytral ridges strong, ridges 3 and 4 joined together before reaching elytral edge. Sculpture on metasternum wholly developed; sculpture on ventrites amoeba-like, irregularly connecting one another ( Fig. 6 ).

Distribution. Japan: Hokkaido, Honshu and Kyushu.

Figures

Figs 1–4. Antennae (right side) of the four Japanese species of Lasconotus.—1, L. niponius (Lewis, 1879) (JAC-1); 2, L. okadai Aoki, 2011 (JAC-8); 3, L. sculpturatus (Sharp, 1885) (JAC-11); 4, L. akitai sp. nov. (paratype, NSMT-I-C 200239). Scale bars: 0.1mm.

Figs 5–8. Anterior part of ventrites of the four Japanese species of Lasconotus.—5, L. niponius (Lewis, 1879) (JAC-1); 6, L. okadai Aoki, 2011 (JAC-9); 7, L. sculpturatus (Sharp, 1885) (JAC-11); 8, L. akitai sp. nov. (paratype, NSMT-I-C 200239). Scale bars: 0.1mm.