Trypanidius Blanchard, 1846

Carelli, Allan, Monné, Marcela L. & Machado, Vanessa Souza, 2013, Taxonomic revision of Trypanidius Blanchard, 1846 in South America (Insecta: Coleoptera: Cerambycidae), Zootaxa 3691 (2), pp. 253-272 : 254

Trypanidius Blanchard, 1846

Trypanidius Blanchard, 1846: 209 ; Monné, 2005: 145. Trypaniduis ; Thomson, 1864: 28 (sic).

Trepanideus ; Heyne & Taschenberg, 1907: 243 (sic). Type species. Trypanidius andicola Blanchard, 1846 (by monotypy).

Redescription. Lower eyes lobes subquadrate to rounded; subequal to tree times longer than genae. Genae slightly projected with apical margin truncate to slightly rounded, with two or more long setae in internal margin ( Fig. 1 ). Antennal tubercles feebly prominent, obliquely directed posteriorly and widely separated. Antennae filiform, with 11 antennomeres; antennomeres 3–11 decreasing in length; not sexually dimorphic; exceeding or not elytral apices. Scape long, cylindrical, slightly narrowed at base, subequal to 1.6 times longer than antennomere 3. Pedicel short, cylindrical.

Prothorax transverse; 1.3 to 2 times wider than long; with postmedian lateral tubercles and two lateral elevations ( Fig. 2 ). Pronotum with anterior and posterior margins with row of punctures. Anterior margin of prothorax provided with ridge that can be interrupted or not on the pronotal disc. Prosternal process two to three times narrower than procoxal cavity. Mesosternal process subequal to 1.5 times narrower than mesocoxal cavity.

Elytra 3 to 4.5 times longer than prothorax; central-basal crest curved, and positioned near suture ( Figs. 3, 4 ); punctures coarse and dense in basal half, gradually sparse to apex; apex truncate to obliquely truncated. Humeri rounded and slightly to strongly prominent anteriorly.

Fore legs 1/3 shorter than hind legs. Femora clavate. Tibiae linear; tibial spurs short, subequal in length.

First urosternite 1/3 longer than next; urosternites 2–4 subequal in length; urosternite 5 about 2 times longer than 4, narrowed toward apex.

Comments. The tribe Acanthocinini is widely distributed and currently has 149 genera and over 950 species in the Neotropical Region (Monné, 2005). This great diversity makes it difficult to develop a comparative discussion among all the genera of the tribe. Two genera are cited in the literature as similar to Trypanidius : Lagocheirus Dejean, 1835 and Leptostylus LeConte, 1852 (Thomson, 1860) . These genera have in common with Trypanidius a pair of lateral tubercles on the prothorax, the presence of a central-basal, curved crest near the elytral suture and clavate femora. Trypanidius differs from Lagocheirus by the absence of pronotral tubercles or with only a postcentral elevation and two in the middle, absence of the inner apical projection on antennomere 6 and long setae in the protibiae and protarsi of males. Leptostylus differs from Trypanidius by the presence of five tubercles on the pronotum, and the apices of the metafemora armed with a spine. In Trypanidius , the apices of the metafemora are unarmed.

Figures

FIGURES 1 – 4. 1 – 2, Trypanidius proximus; 1, detail of long setae in the internal margin of the genae; 2, detail of two lateral elevations on prothorax; 3 – 4, T. dimidiatus; central-basal crest curved on elytra: 3, dorsal view; 4, lateral view.