Review of the genus Hovorestenia Santos-Silva (Coleoptera: Disteniidae)

Juan Pablo Botero

doi:10.11606/1807-0205/2020.60.special-issue.07

Abstract

Hovorestenia Santos-Silva, 2007 is a disteniid genus differentiated from other Neotropical Disteniini by the metatarsomeres II and V subequal in length, in contrast with the metatarsomere V distinctly longer than II in the other genera. So far, the genus is known only from male specimens. The discovery of new Hovorestenia species, represented by both sexes, shows that such current diagnostic character is sexually dimorphic, with metatarsomere V distinctly longer than II in female. The genus Hovorestenia is therefore reviewed and redescribed and two new species are described: H. cleideae, from Colombia and Ecuador, and H. espilota, from Colombia. It allowed to describe the hitherto unknown females and to appoint out sexually dimorphic characters for the first time in the genus. The genus is now composed of four species distributed from the central region of Colombia to Ecuador. Photographs of Hovorestenia species are included and a key to differentiate them is provided.

Highlights

Hovorestenia was described by Santos-Silva for a single species, Distenia humeralis Waterhouse, 1880, described from Ecuador, and characterized by the following combination of characters: eyes finely faceted; pronotum lacking central gibbosity; metatarsomere V, about as long as II
The geographic range of the genus is expanded to the north, reaching the central region of Colombia
Remarks: Hovorestenia cleideae sp. nov., is similar to H. humeralis (Fig. 7) in having the elytra with an orange longitudinal band on the humeral region, but differs as follows (H. humeralis in parenthesis): surface of body with fine, sparse setae, especially ventrally and on legs; head finely punctate; pronotum with fine and alveolate punctation and anterior tubercles glabrous; longitudinal band of elytra starting on humeri; and body size smaller, average total length = 10.9 mm

Summary

Introduction

Hovorestenia was described by Santos-Silva (in Santos-Silva & Hovore, 2007) for a single species, Distenia humeralis Waterhouse, 1880, described from Ecuador, and characterized by the following combination of characters: eyes finely faceted; pronotum lacking central gibbosity; metatarsomere V, about as long as II. Antennae reaching elytral apex at antennomere VII; scape with short whitish setae, with darker longer setae interspersed; antennomeres finely punctate; III with basal ring of whitish pubescence; IV‐XI with whitish pubescence on basal fourth (less evident toward apical antennomeres) and dark pubescence on remaining surface; scape slightly curved basally, subcylindrical; antennal formula (ratio) based on length of antennomere III (only holotype measured): scape = 0.99; pedicel = 0.06; IV = 0.88; V = 0.88; VI = 0.79; VII = 0.72; VIII = 0.65; IX = 0.61; X = 0.54; XI = 0.64.

Results

Conclusion