Acicnemis biarcuata Hubenthal, 1919

Lewis, Jake H., Kojima, Hiroaki & Campbell, Erin O., 2025, A Japan-focused review of East Asian Acicnemis Fairmaire, 1849 (Coleoptera, Curculionidae) reveals cryptic diversity in a well-studied region, ZooKeys 1259, pp. 103-167 : 103-167

Acicnemis biarcuata Hubenthal, 1919

Fig. 8

Type material examined

( Taiwan: 5). Holotype. Taiwan • “ Kosempo ”, “ Formosa ”, “ IX. 09 ”, “ Sauter ”, bears red label reading “ Holotypus ”, SDEI, SDEI Coleoptera # 303414, SDEI Muncheburg COL–18569 .

Non-type material.

Taiwan • Lienhoachii , “ 1975.5. 12 ”, S. Imasaka (1, TUA), JHL_SYN_184 ; • Mudan Township , Pingtung County, 22°08'21.71"N, 120°51'31.23"E, 9. III. 2013, Y. Fujisawa (1, TUA), JHL_AREV_626 ; • Mudan Township , Pingtung County, 22°06'12.57"N, 120°47'33.71"E, 6. III. 2013, Y. Fujisawa (1, TUA), JHL_AREV_627 ; • Manzhou Township , Pingtung County, 22°08'30"N, 120°51'13"E, 2. V. 2019, S. Shimamoto (1, TUA), JHL_AREV_628 .

Diagnosis.

Body length 4.0– 5.2 mm. Covered in dark-gray scales, with two V-shaped, transverse black bands across middle of elytra. Pronotum with pale brown and yellow scales dorsally, but dark at base medially. Pronotum approx. sculptured and carinate. Scutellum shiny and bare in examined specimens. Only odd elytral intervals with erect scales across elytral disk (some erect scales on 2 nd interval in apical fourth of elytra). Third and fifth elytral intervals with cluster of 3–5 erect scales at elytral base. Sclerolepidia distinct and protruding. Mesosternum with distinctly raised ridge between meso-coxae, highest laterally but dipping shallowly medially (no such ridge or only weakly developed in most other species). Third tarsomeres weakly emarginate.

Distribution.

This species is currently only known from Taiwan.

Figures

Figure 8. Acicnemis biarcuata Hubenthal, 1919 (JHL _ AREV _ 628). A. Lateral; B. Dorsal. Scale bar: 1 mm.