Pseudeburia, Botero, 2015

Botero, Juan Pablo, 2015, Pseudeburia, a New South American genus of longhorned beetle (Cerambycidae: Cerambycinae: Bothriospilini), Journal of Natural History 49 (41), pp. 2583-2587 : 2584-2586

Pseudeburia gen. nov.

Type species

Eburia albolineata Fisher 1944

Description

Frons transverse, short; antennal tubercles slightly projected. Eyes coarsely faceted, deeply emarginated, distance between upper lobes 1.5 times the width of an upper lobe. Mandibles acute, curved at external margin. Genae short, acute at apex. Antennae 11-segmented, filiform, unarmed, in both sexes surpassing elytral apex.

Prothorax rounded at sides, with a short, acute, median-lateral spine. Pronotum with two antemedian tubercles, rounded at top; with a median longitudinal gibbosity, slightly elevated. Procoxal cavity rounded, not angulated at sides. Prosternal process narrow, about one-third as wide as procoxal cavity. Mesosternal process tuberculated, mesocoxal cavities about 1.5 times width of mesosternal process. Prosternal and mesosternal process with lateral projections that fit into notches on coxae.

Scutellum small, rounded at apex. Elytra convex, parallel-sided, elongate, at least three times as long as the width across humeri, with eburneus callosities. Apex truncated, bispinose, external spine longer than inner spine.

Mesotibiae, metatibiae and femora linear, inner apex of mesotibiae and metatibiae with a long and acute spine (longer than pedicel length), mesotarsomere and metatarsomere I 1.5 times longer than mesotarsomere and metatarsomere II.

Urosternites transverse, subequal in width; urosternite V truncate and sinuous at middle.

Etymology

Pseudeburia refers to the great similarity with the genus Eburia Lacordaire, 1830 (Eburiini) .

Remarks

Eburia albolineata was described by Fisher (1944) based on a unique female, from Caripito, Venezuela, and placed in the tribe Eburiini (Cerambycoinia) . The general appearance and especially the eburneus callosities are typical of Eburiini , but examination of the female holotype, and specimens of the MNRJ, showed that the terminalia of Pseudeburia albolineata comb. nov. is purpuriceniform. The differentiation of this type of terminalia is a very complex trend that involves some sternites, not only in the female terminalia but also in the male terminalia and should have evolved only once in Cerambycinae ( Fragoso et al. 1987) . The eburneus callosities, on the other hand, are a characteristic that occurs in many tribes of Cerambycinae , as for example in Trachyderini , Torneutini , Bothriospilini (Trachyderoinia) , Heteropsini and Hesperophanini (Cerambycoinia) and does not occur in all the Eburiini – e.g. Styliceps sericata ( Pascoe 1859) , Simplexeburia divisa Martins and Galileo 2010 , Opades costipennis ( Buquet 1844) .

The monophyly of Trachyderoinia has never been formally tested, but although their main objective was not that, Monné and Napp (2005) corroborated the proposal of Fragoso et al. (1987) and recognized some characters that define the supertribe: metepisternum with glandular pores; sternites I–V widened and sternite V transverse, sinuous at apex; apophysis of male VIII sternite short, half or less length of sternite; median lobe and internal sac shortened; distal region of female VIII sternite with a brush of differentiated setae; female VIII tergite transverse and bi- or trilobated; ovipositor short, at most as broad as long. As mentioned in the Introduction, there are many works that describe and illustrate the Trachyderoinia terminalia: Moura and Galileo (1992) (figs 1–10), Monné and Napp (2000) (figs 47–72), Monné (2005b) (figs 29–54, 62–80), Monné and Napp (2005) (figs 124–125, 127–132), Botero and Monné (2012) (figs 13–15, 25–27, 38–39, 43–45, 56–58, 72–75, 86–88, 102–105, 116–118, 135–138, 149–151, 168–171, 182–184, 198–201, 212–214), Quintino and Monné (2014) (figs 48–50, 61–63, 74–76, 87–89, 94–97, 102–105, 110–113, 118–121). The terminalia described in these works are in accord with the proposal of Monné and Napp (2005) and with the terminalia described in Pseudeburia gen. nov. ( Figures 1B–D ).

In Trachyderoinia only two tribes have eyes coarsely faceted, Torneutini and Bothriospilini . Bothriospilini is characterized by the antennae elongate in both sexes, prothorax with lateral projections, procoxal cavities rounded at sides, mesosternal process with lateral projections, mesofemora and metafemora spinose at apex and hind legs twice as long as forelegs ( Monné and Napp 2005). All of these characteristics are present in Pseudeburia gen. nov.

Beyond Pseudeburia gen. nov., in Bothriospilini only three genera have eburneus callosities: Bothriospila Aurivillius 1923 , Taygayba Martins and Galileo 1998 and Timbaraba Monné and Napp 2005 . Bothriospila differs from the other genera because its eburneus callosities are irregular and clothed with short pubescence ( Monné and Napp 2005). Pseudeburia gen. nov. differs from Taygayba by having the sides of the prothorax armed with an acute spine, by the spinose elytral apices and the inner apices of the mesofemora and metafemora with a long spine. In Taygayba the sides of the prothorax, apices of elytra, and the inner apices of the mesofemora and metafemora are unarmed. Pseudeburia gen. nov. differs from Timbaraba by having the inner apical spine of the mesofemora and metafemora well developed (longer than pedicel length). In Timbaraba the inner apical spine of the mesofemora and metafemora are moderately short (shorter than pedicel length).

Figures

Figure 1. Pseudeburia albolineata comb. nov., female. (A) Holotype; (B) detail of the brush of setae, posterior view; (C) sternite VIII (brush of setae); (D) tergite VIII.