Notoxus iuvenis, Kejval, 2011

Kejval, Zbyněk, 2011, Taxonomic revision of the Oriental species of Notoxus (Coleoptera: Anthicidae), Acta Entomologica Musei Nationalis Pragae 51 (2), pp. 627-673 : 639-641

Notoxus iuvenis sp. nov.

( Figs. 13, 14 )

Type locality. Laos, Vientiane Province, 55 km north of Vientiane, Ban Vangheua, Phou Khao Khouay National Park, 18°27′N 102°49′E.

Type material. HOLOTYPE: J, ‘ LAOS, Vientiane Prov., 55 km N of Vientiane, BAN VANGHEUA, 18°27′N 102°49′E // Phou Khao Khouay National park 4.–18.v.2005 P. Kresl leg.’ ( NMPC); 18 spec, same data as holotype ( ZKDC, 1 spec. each in BMNH, DCDC, MHNG, MNHN, NHMB, NHMW, ZMHB, ZSMC); 1 spec., ‘ LAOS central, Saisombun zone PHOU KHAO KHOUAY Nat. Park, TAD LEUK, 18°23′N, 103°04′E 15.–21.V.2001, alt. 150–200 m E. Jendek & O. Šauša leg.’ ( ZKDC); 3 spec., ‘ LAOS centr., Bolikhamsai prov., BAN NAPE – Kaew Nua Pass, 18.4.– 1.5.1998, alt. 600± 100 m, N 18°22.3, E 105°09.1 ( GPS), M. Štrba & R. Hergovits leg.’ ( ZKDC); 3 spec., same data, except: ‘ E. Jendek & O. Šauša leg.’ ( ZKDC); 1 spec., ‘ LAOS c., Bolikhamsai prov., BAN NAPE – Kaew Nua Pass, 18.4.– 1.5.1998, alt. 600 m, N 18°22.3′ E 105°09.1′ GPS, E. Jendek, O. Šauša leg.’ ( ZKDC); 3 spec., ‘ LAOS, 24.–29.iv.2007, Khammouan Prov., 18°07′N 104°29′E, Ban Khoun Ngeun, ~ 200 m ,, Vít Kubáň leg.’ ( ZKDC); 1 spec., ‘ LAOS centr., Khammouan pr., BAN KHOUN NGEUN vill. env., 17.v.–6.vi.2007, ~ 300 m, M. Štrba leg.’ ( ZKDC).

Description. Male (holotype). Body length 3.0 mm. Body largely brownish black, elytra with brownish apices, lateral margins and suture, and with two narrow, transverse pale reddish bands; legs and antennae reddish brown, antennae slightly darkened apically. Pronotum and elytra moderately glossy; pronotal disc rather distinctly, densely punctured; punctures in basal half of elytra coarser and somewhat sparser than those on pronotum, dot-like with rather smooth margins. Body setation appressed to subdecumbent; pronotum with some conspicuously long suberect to erect setae antero-laterally; elytra with numerous distinctly longer suberect setae. Antebasal setose band of pronotum conspicuous, widely interrupted medially.

Head with medium-sized eyes; tempora strongly and nearly evenly narrowing posteriad. Antennae long, moderately but distinctly enlarged in terminal third. Pronotum as wide as head across eyes, globose to slightly elongate in dorsal view. Pronotal horn moderately long, slender, armed with 3–4 small lobules laterally on each side and wider apical lobule; horn crest distinctly raised, evenly lowering towards horn apex, its lateral margins feebly marked by series of somewhat coarser, distinctly spaced lobules / rugules; dorsal surface densely covered by distinct rugules. Elytra elongate, nearly twice as long as wide; humeri distinctly protruding; omoplates and postbasal impression moderately indicated; elytral apices nearly simple (gland opening inconspicuous). Legs simple. Abdominal sternum VII simple, its posterior margin nearly evenly rounded in ventral view. Tergum VIII forming narrow, arched sclerite, evenly rounded posteriorly, rather finely and sparsely setose. Aedeagus as figured ( Fig. 13, 14 ).

Female. Externally identical with male.

Variation. Body length (J ♀) 2.6–3.3 mm. Pronotal horn with 3–4 small lobules laterally on each side; apical lobule small to conspicuously wide and incised apically (nearly bilobed).

Differential diagnosis. Notoxus iuvenis sp. nov. is very similar and undoubtedly very close to N. indicus and N. pachodemba sp. nov. It differs from these species by simple protibiae in the males (modified in N. pachodemba sp. nov.), and mainly by shape of the parameres of the aedeagus (cf. Figs. 13, 14 versus 12, 15).

Etymology. From the Latin word iuvenis (youth, youngster); named in reference to the less developed, shorter and simple parameres of the aedeagus. Noun in apposition.

Distribution. Laos.

Figures

Figs. 12–15. 12 – Notoxus indicus Krekich-Strassoldo, 1914 (Umphang), aedeagus; 13 – N. iuvenis sp. nov., aedeagus; 14 – the same, paramere in lateral view; 15 – N. pachodemba sp. nov., aedeagus. Scale (0.5 mm): A – Fig. 13; B – Fig. 12; C – Figs. 13, 14.