Potiapua Napp & Monné, 2009

Napp, Dilma Solange & Monné, Miguel A., 2009, New Neotropical genera and species of Dryobiini and Rhopalophorini (Coleoptera: Cerambycidae: Cerambycinae), Zootaxa 2137, pp. 29-34 : 31-33

Potiapua Napp & Monné New Genus

Type species: Potiapua antonia Napp & Monné , new species

Description. Head short. Frons wider than long, declivous, somewhat subangulate between the rounded antennal tubercles. Genae short, about one third as long as the lower eyes lobe. Eyes finely granulate, deeply emarginate, lobes connected by a narrow strip of two ommatidia; lower lobes well developed, prominent; upper lobes narrow, little developed, just reaching the border of antennal tubercles. Clypeus almost as long as frons; clypeal suture bisinuate. Mandibles slender, acute at apex; outer side somewhat enlarged, regularly curved apically. Apical segment of maxillary palps cylindrical, truncate at apex, longer than two preceding which are short and conical. Antennae filiform, unarmed, 11–segmented, neither sulcate nor carinate, longer than body. Scape cylindrical, not sulcate. Segments from 3 cylindrical, slender; 3 and 5 each little longer than 4; 5–9 each longer than 3; 11 as long as 3. Prothorax longer than wide; sides narrowed and subparallel at apical third, then broadly rounded, widest at middle. Pronotum ( Fig. 3 ) uneven, with prominent, somewhat acuminate tubercle on each side at apical half. Prosternum transversely swollen behind middle with a median projection in front of prosternal process, acute and with tuft of setae at apex ( Fig. 4 ). Prosternal process narrow between procoxae, slightly expanded apically. Procoxal cavities rounded, slightly angulate, open behind. Mesosternal process little wider than mesocoxa, parallel-sided, shallowly emarginate at apex to fit metasternum. Mesosternal cavities closed to epimera. Metepisterna narrow, slightly sinuate. Scutellum small, quadrangular. Elytra narrow, parallel-sided, not impressed at base, without costae; surface entirely punctate; margins not asperate. Legs elongate, very slender. Pro- and mesocoxae rounded, not prominent. Femora pedunculate and gradually clavate, peduncles neither sulcate nor carinate; metafemora exceeding elytral apices. Tibiae cylindrical, not carinate. First segment of metatarsi longer than the following combined.

Remarks. Potiapua new genus differs from all other Rhopalophorini in having the prosternum with an acute projection, tufted at apex, and by the prominent tubercles at the apical half of the pronotum. By the slender form and gradually clavate femora it is similar to Muxbalia Giesbert & Chemsak described from Guatemala ( Giesbert & Chemsak 1993: 60, fig. 12).

Etymology. The name of the genus is a combination of two indigenous Tupi words: poti = chest, plus apu = prominence, alusive to the prosternal tubercle.

Figures

FIGURE 1 – 4. 1, Anisotyma soteri new species (holotype male); 2, Potiapua antonia new species (holotype male); 3, P. antonia, head and prothorax; 4, P. antonia, lateral view of prosternum showing tufted tubercle.