Anchylorhynchus pinocchio Medeiros & Núñez-Avellaneda, 2013, sp. n.

Anchylorhynchus pinocchio sp. n.

Figs. 1 A, 1B, 2A, 3A

Holotype: Male. Colombia, Casanare, Yopal, Corregimiento Morichal, 30/IX/2010, L. Núñez & J. Carreño col. In inflorescence of Syagrus sancona. Deposited in ICN.

Paratypes: Colombia, Casanare, Sabanalarga, Vereda Piñal, 20/VII/2010, L. A. Núñez col. (53 2Ƥ MZSP); Colombia, Casanare, Yopal, Corregimiento Morichal, 11/VI/2008, L. A. Núñez col. (1Ƥ MZSP), 30/IX/2010, L. Núñez & J. Carreño col. (53 5Ƥ ICN), 15/X/2010, L. Núñez & J. Carreño col. (103 10Ƥ ICN).

Description. Length of pronotum + elytra: 4.8–5.7 mm (3) or 4.5–5.1 mm (Ƥ).

Rostrum 2.1–2.7 (3) or 1.6–1.7 (Ƥ) times as long as pronotum; 1.1–1.3 (3) or 1.0 (Ƥ) times wider at apex than at base; black; with seven longitudinal carinae, four outermost irregular near base. Head with yellowishbrown integument, distinctly lighter-colored than rostrum. Antennae with curved (3) or straight (Ƥ) scape, greatly (3) or slightly (Ƥ) extending beyond anterior margin of eye; with second antennomere of funicle longer than first and 1.5 times as long as third; with club shorter and just slightly wider than last antennomere of funicle. Pronotum 1.4–1.5 (3) or 1.5–1.6 (Ƥ) times wider than long, with lateral margins parallel from base to the median region, there with inflexion towards the apex (3), or lateral margins convergent from base to apex, with a slight inflexion in the middle (Ƥ); with yellowish brown integument entirely covered by yellow scales; with scales of the median basal area directed toward base. Prolegs distinctly longer than meso- and metalegs (3) or similar in length to meso- and metalegs (Ƥ); with protarsomere I more than three times as long as protarsomere III (3) or slightly longer than protarsomere III (Ƥ); with protarsomeres I and II longer than wide. Elytra 1.3–1.5 (3) or 1.4–1.6 (Ƥ) times as wide as pronotum and 3.4–3.6 (3) or 3.7–4.0 (Ƥ) times as long as pronotum; 1.6–1.9 (3) or 1.6–1.7 (Ƥ) times longer than wide; evenly covered by yellow scales; with lateral margins slightly more separated in the middle. Aedeagus 2.3 times longer than wide; parallel-sided; with constricted and rounded apex. Apodemes approximately 2.5 times as long as aedeagus.

Etymology. Named after the popular fictional character Pinocchio, because of the extremely elongate rostrum as compared to other species of the genus.

Remarks. The black seven-carinate rostrum with irregular carinae at base is shared with Anchylorhynchus albidus Bondar, 1943 and distinguishes A. pinocchio from other Colombian species (A. tricarinatus and A. bicarinatus have at most three carinae on the rostrum). Anchylorhynchus pinocchio, however, has an inflexion in the middle of the lateral pronotal margins, and scales of the median basal region are oriented backward, while Anchylorhynchus albidus has evenly curved pronotal margins, with scales directed forward or centrally. Males are further distinguished from this and other species of Anchylorhynchus by their extremely long rostrum, antennae and prolegs. Females can be distinguished by the rostrum not wider at apex than at base and by the antennal scape extending beyond the anterior margin of the eye.

This is the only species of Anchylorhynchus with a distinctly sexually dimorphic rostrum.

Biological information. Between 1–5 individuals of A. pinocchio were seen to visit staminate and pistillate flowers, consuming pollen and copulating among the flowers. Females lay their eggs on the pistillate flowers only.

Known host species. Syagrus sancona H. Karst. (Arecaceae).

Type locality. Colombia, Casanare, Municipio Yopal, Corregimiento Morichal

Geographical distribution. This species has been found in lowland rainforest and gallery forests of Colombia (Casanare), in elevations ranging from 150 to 500 m above sea level.