Anisotyma 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 : 30

Anisotyma Napp & Monné New Genus

Type species: Anisotyma soteri Napp & Monné , new species.

Description. Head moderately long. Frons almost as broad as long, plane, subvertical. Antennal tubercles somewhat acuminate. Eyes finely granulate, deeply emarginate, upper and lower lobes connected by a narrow strip of two omatidia; lower lobes little developed, upper lobes narrow, distance between them about four times width of one lobe. Genae almost as long as lower lobe eyes, rounded at apex. Mandibles slender, regularly rounded, acute at apex. Apical segments of maxillary and labial palps longer than respective preceding ones, gradually expanded apically. Antennae filiform reaching the elytral apex at middle of segment 6, neither sulcate nor carinate; segments 3–5 with a minute spine at inner apex. Scape robust, base as broad as apex, with an inner basal tooth. Segments from 3 long, cylindrical, densely fringed beneath, more so 3–5. Prothorax longer than wide, regularly rounded at sides, widest at middle. Pronotum without gibbosities. Prosternal process narrow between procoxae, subparallel at sides, not expanded apically. Procoxal cavities rounded, slightly angulate at sides, open behind. Intercoxal process of mesosternum somewhat prominent, subparallel-sided, as wide as mesocoxa; apex narrowly, subangulately notched at middle to fit metasternum. Mesocoxal cavities almost closed to epimera. Scutellum small, triangular. Elytra almost 3 times as long as width across humeri, tapering slightly, apices obliquely truncate, unarmed. Pro- and mesocoxae rounded, not prominent. Femora impressed, with a short carina on each side at apex, metafemora less conspicuously so; apices rounded. Pro- and mesofemora pedunculate-clavate; metafemora very thickened almost at length, narrowed only at base, not reaching elytral apex. Tibiae cylindrical, carinate, metatibiae bent. Metatibial spurs well developed, strong, the inner one longer. First segment of hind tarsi as long as the following two combined.

Remarks. Anisotyma new genus is similar to Ornithia but differs mainly in having the prothorax longer than wide, with sides regularly rounded, not tuberculate or angulate, and not tapering from middle to apex and base; pronotum regularly convex, without lateral or median callus; metafemora strongly thickened, narrowed only at basal fifth and subangulate dorsally near base; metatibiae bent; segments 2–4 of maxillary palps, and 2–3 of labial palps elongate subtriangular. In Ornithia , the prothorax is somewhat hexagonal, angulate or tuberculate at middle, conspicuously tapering to apex and base; the pronotum has a large median callus and two lateral gibbosities on each side in front of middle; the metafemora are conspicuously pedunculate-clavate, with the peduncle slender extending up to one third of the femora length; the metatibiae are straight; the segments 2–3 of the maxillary palps and 1–2 of the labial palps are short conical, the apical ones dilated but not elongate.

Etymology. Aniso, from Greek, meaning unequal plus tyma, from indigenous Tupi language, meaning legs; allusive to the metafemora.