Acicnemis nobilis 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 nobilis Hubenthal, 1919

Figs 6 J 1–6 , 2 , 21

Type material examined

( Taiwan: 10). Holotype. Taiwan • Hoozan , “ H. Sauter 1910 ”, bears small yellow label reading “ 1911 14 ”, bears red label reading “ Typus ”, SNSD .

Non-type material.

Taiwan • Penpuchi , Nantou Hs., 13. VII. 1966, H. Sasaji (2, KUM), JHL_SYN_151 (dissected male), JHL_AREV_492 ; • Sangkang , Nantou Hs., 14. VII. 1966, H. Sasaji (3, KUM), JHL_SYN_150 (dissected male), JHL_AREV_491 , JHL_AREV_493 ; • Lushan , Nantou Hsein, 8. VI. 1976, H. Makihara (1, KUM), JHL_AREV_494 ; • Nanshanchi , Wenchuan Hs., 27. IV. – 4. V. 1977, T. Mikage (1, KUM), JHL_AREV_495 ; • Hsi-Leng , 3. V. 1981, S. Tsuyuki (1, TUA), JHL_AREV_496 ; • Kaohsiung, 5. VIII. 1978, T. Niisato (1, TUA), JHL_AREV_497 .

Diagnosis.

Body length 4.1–5.2 mm. Covered in dark gray and black scales, with a pale-yellow scale, V-shaped, transverse band across middle of elytra. Basal patch of black scales surrounding scutellum approx. V-shaped and extending prominently onto the second elytral intervals (as opposed to the similar A. nohirai which has an elongate I-shaped patch of black scales on the first elytral interval that barely extends on the second elytral interval basally). Pronotum lacking impunctate longitudinal midline (present in A. koguma ). Scutellum covered in pale scales. Elytra with erect scales only on odd intervals. Sclerolepidia distinct and protruding. Third tarsomeres distinctly emarginate. Pedon with lateral edges approx. parallel in dorsal view, but sinuating into a blunt, rounded point. Internal sac protruding from aedeagus, with roughened musculature posteriorly and a club-shaped sclerotized structure anteriorly at its apex (Fig. 6 J 1 – 2 ).

Distribution.

This species is currently only known from Taiwan.

Figures

Figure 2. Diagnostic morphological characters in Acicnemis. A. A. azumai Morimoto & Miyakawa, 1995 (JHL _ ACITAI _ 081) showing lack of prominent posterior prosternal projections; B. A. laeta Hubenthal, 1919 (JHL _ AREV _ 533) showing prominent prosternal projections; C. A. kiotoensis Nakane, 1963 (JHL _ AREV _ 982) showing antenna with the second funicular antennomere longer than antennomeres 3 + 4; D. A. koguma Lewis & Kojima, sp. nov. (JHL _ SYN _ 141) showing antenna with the second funicular antennomere shorter than antennomeres 3 + 4; E. A. luteomaculata Morimoto & Miyakawa, 1995 (JHL _ AREV _ 189) showing truncate third tarsomere; F. A. ryukyuana Lewis, 2023 (JHL _ ACI _ 011) showing weakly emarginate third tarsomere; G. A. maculaalba Roelofs, 1875 (JHL _ AREV _ 577) showing strongly emarginate third tarsomere.

Figure 6. Aedeagi of Acicnemis. A 1–2. A. albofasciata (Ter-Minasian 1953); B 1–2. A. azumai Morimoto & Miyakawa, 1995; C 1–2), A. cryptica Lewis & Kojima, sp. nov.; D 1–2. A. dividicincta Morimoto & Miyakawa, 1995; E 1–2. A. exilis Morimoto & Miyakawa, 1995; F 1–2. A. kiotoensis Nakane, 1963; G 1–2. A. laeta Hubenthal, 1919; H 1–2. A. luteomaculata Morimoto & Miyakawa, 1995; I 1–2. A. maculaalba Roelofs, 1875; J 1–2. A. nobilis Hubenthal, 1919; K 1–2. A. nohirai Morimoto & Miyakawa, 1995; L 1–2. A. palliata Pascoe, 1872; M 1–2. A. postica Hubenthal, 1919; N 1–2. A. ryukyuana Lewis, 2023; O 1–2. A. sauteri Hubenthal, 1919; P 1–2. A. shibatai Voss, 1971; Q 1–2. A. shigematsui Morimoto & Miyakawa, 1995; R 1–2. Acicnemis sp. 1; S 1–2. A. squamata Lewis & Kojima, sp. nov.; T 1–2. A. suturalis Roelofs, 1875.

Figure 21. Acicnemis nobilis Hubenthal, 1919 (JHL _ AREV _ 496). A. Lateral; B. Dorsal. Scale bar: 1 mm.