New genus and species of Trachyderini (Coleoptera, Cerambycidae, Cerambycinae) from Peru.

Stéphane Le Tirant, Antonio Santos-Silva


According to Monné (2015) and Bezark (2015) Trachyderini Dupont, 1836 is divided in two subtribes: Ancylocerina Thomson, 1864 (with seven genera); and Trachyderina Dupont, 1836 (with one hundred twenty-five genera). Monné (2015) listed one hundred twenty-two genera of Trachyderina in the Neotropical Region. Despite the great number of genera of Trachyderina, it was not possible to include the new species in any of them. Fragoso et al. (1987) separated the subtribes in a key: “Mesocoxal acetabula laterally closed; elytral surface strongly punctate, epipleura sinuous; scutellum small, often depressed; males with the border of sternite 8 projected latero-ventrally beyond the limits of corresponding tergite (verified in Ancylocera and Callancyla)”, conducting to Ancylocerina; and “Mesocoxal acetabula usually open laterally; body, scutellum, antennae and elytral surface highly variable; borders of sternite 8 not laterally projected”, conducting to Trachyderina. The shape of the border of the sternite 8, apparently, is variable in Ancylocerina. For example, it is not projected in males of Cercoptera banonii Spinola, 1839. As all other features listed to Ancylocerina are variable in Trachyderina, except for the border of sternite 8, they cannot be used to separate the subtribes. It is not the scope of this work to study the subtribes, but if the mesocoxal acetabula are “usually” open in Trachyderina, it can be inferred that they can be closed in some species. Monné and Napp (2000) commented: “Fragoso et al. (1987) established Ancylocerina Thomson (1864) as a subtribe of Trachyderini Dupont, basically by the shape of the brush on the eighth urosternite of the females, formed, as in the Trachyderina, by long-petiolate conchoidal, spatulate and acicular setae, arranged in several rows.” Monné and Napp (2000) did not describe sternite 8 in males of Ancylocerina, and did not give differences between the subtribes. We are assuming that all genera with mesocoxal cavities laterally closed belong to Ancylocerina and those that are open belong to Trachyderina. The new genus herein described belongs to the latter.

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