Araiorrhinus zimmermani, Mantilleri, 2011

Mantilleri, Antoine, 2011, Revision of the Tribe Microtrachelizini Zimmerman, 1994, from Australia: New Taxa and Records (Insecta: Coleoptera, Brentidae), Records of the Australian Museum 63 (1), pp. 89-98 : 91-93

Araiorrhinus zimmermani n.sp.

Microtrachelizus species 2 , Zimmerman, 1991: 151; 1994: 192, 193, 194.

Type material. HOLOTYPE ♀, Mt Glorious , 4.I.1974, R. A. Yule, associated with Eurhamphus fasciculatus in Hoop Pine ( ANIC) . PARATYPES: ♀, Mt Glorious , 16.V.1974, R. A.Yule, MNHN EC1816 ( MNHN) ; ♂, E. Sutton, 20.7.32, Rivertree ( ANIC) .

Description. Measurements. Length: 5.1–5.6 mm; width across humeral calli: 0.7–0.9 mm; ratios: length of head/length of pronotum: 1.3–1.4; length of pronotum/width of pronotum: 1.4–1.5; base of pronotum/apex of pronotum: 1.1–1.2; length of pronotum/length of elytra: 0.38–0.40; length of elytra/width of elytra: 3.3–3.9. — Colour. Brownish-red. — Habitus: Figs 1–2 . — Head ( Fig. 14 ) strongly broader than long, convex, smooth, shiny, without basal notch. Eyes large, projecting laterally; temples very short, almost indistinct, not protruding behind eyes. Vertex and frons smooth. Metarostrum and mesorostrum with broad, deep median groove vanishing on basal half of prorostrum; metarostrum without lateral grooves. Prorostrum 1.0–1.3× longer than head + metarostrum + mesorostrum. Antennal segment 3 ( Fig. 15 ) conical, hardly longer than broad; 4–8 almost cylindrical, broader than long; 9–11 not flattened, forming a club, 11th 1.7–1.9× longer than 10th, strongly acuminate at apex. Venter of head and metarostrum longitudinally grooved; mesorostrum with a weak projection on either side under antennal base; lower side of mesorostrum and base of prorostrum with few erect setae. — Pronotum ( Fig. 14 ) cylindrical, shiny, smooth, without longitudinal groove except at base. Prothorax without fovea in front of strongly bulging and conical procoxae; prosternellum distinct, depressed. Meso- and metafemora pedunculate. Protibiae ( Fig. 16 ) 0.7–0.8× as long as profemora. Metasternum convex, not grooved, smooth, laterally not carinate. Elytra glabrous, base straight; sides smooth and shiny; apex strongly rimmed, not notched. Interstria 2 distinct only at apex; 3 distinct at base and apex, very narrow in middle; 4 hardly distinct from base to apical declivity; 5–9 indistinct. Hind wings without basal sclerite ( Fig. 50 ). — Abdomen. Sternites III–IV in female ( Fig. 17 ) smooth, depressed in middle, laterally not carinate; V–VI smooth; VII with weak transverse basal notch and two large, deep latero-apical depressions, without apical fovea. Tergite VIII of female ( Fig. 18 ) strongly denticulate at apex. Spermatheca as in Fig. 19 . Gonocoxites ( Fig. 20 ) fused at base; styli apical, reduced. Sternites III–IV in male more depressed; V–VII as in female. Spiculum gastrale as in Fig. 21 . Tegmen ( Fig. 22 ) with parameres short, reduced, filiform, not fused.

Distribution. Known from southern Queensland (Mount Glorious) and northern New South Wales (Rivertree).

Etymology. This new species is kindly dedicated to Elwood C. Zimmerman, in recognition of his great work on the Australian Curculionoidea.

Remarks. This new species was regarded by Zimmerman (1991: 151; 1994: 192–194) as belonging to the genus Microtrachelizus , but its apically inserted styli and long prorostrum (longer than head + metarostrum + mesorostrum) indicate that it belongs in Araiorrhinus instead. This is the second species of Araiorrhinus known from Australia. In the identification key of Damoiseau (1987) for this genus, the new species runs to A. longirostris Senna, 1893 (a synonym of A. exportatus Senna, 1893 : see Mantilleri, 2007) and A. levisulcatus Damoiseau, 1987 , but it differs from all Araiorrhinus species in its completely smooth elytra.

Mantilleri: brentid beetles tribe Microtrachelizini 93

Figures

Figs 1–8. Dorsal and lateral habitus of new species of Australian Microtrachelizini, holotypes. (1–2) Araiorrhinus zimmermani n.sp., ♀. (3–4) Howeius micropterus n.gen., n.sp., ♂. (5–6) Microtrachelizus altostriatus n.sp., ♂. (7–8) Microtrachelizus australicus n.sp., ♂. Scale 1 mm.

Figs 14–22. Araiorrhinus zimmermani n.sp. (14) Head and pronotum, dorsal view. (15) Antenna. (16) Left front leg. (17) Abdomen of female, ventral view. (18) Tergite VIII of female. (19) Gonocoxites. (20) Spermatheca. (21) Spiculum gastrale. (22) Tegmen. Scale for Figs 14–17 and 21–22, 1 mm; scale for Figs 18–19, 0.35 mm; scale for Fig. 20, 0.17 mm.

Figs 34–50. (34–40) Microtrachelizus altostriatus n.sp.: (34) Head and pronotum, dorsal view. (35) Antenna. (36) Left front leg. (37) Abdomen of male, ventral view. (38) Spiculum gastrale. (39) Tegmen. (40) Hind wing (bs, basal sclerite). (41–50) Microtrachelizus australicus n.sp.: (41) Head and pronotum, dorsal view. (42) Antenna. (43) Left front leg. (44) Abdomen of male, ventral view. (45) Spiculum gastrale. (46) Tegmen. (47) Tergite VIII of female. (48) Spermatheca. (49) Gonocoxites. (50) Hind wing. Scale for Figs 34–39 and 38–46, 1 mm; scale for Figs 40 and 50, 2.5 mm; scale for Figs 47–48, 0.35 mm; Fig. 49: 0.17 mm.