Two new species of Beraba Martins, 1997 and new geographical records of Eburiini (Coleoptera, Cerambycidae)

Abstract Two new species of Beraba from Colombia (Bolívar) are described: Berabaanaesp. n. and Berabaangelisp. n. The most recent key to species of the genus was modified to incorporate the new species. The male of Berabalimpida Martins, 1997 is described and illustrated for the first time. Moreover, the geographical distribution of 12 species of Eburiini is expanded.


Introduction
The tribe Eburiini is currently composed of 24 genera and 268 species, all of them with a geographical distribution restricted to North, Central (including the Caribbean) and South America (Botero and Monné 2018).
The genus Beraba  was described to gather together the species described initially in Eburia Lacordaire, 1830 having a bright aspect, antennomere III longer than IV, and femora with spines restricted to the inner margin. Later, Galileo and Martins (2000) transferred Eburodacrys cheilaria Martins, 1967 to the genus. Currently, the genus includes 18 species distributed from Panama to South America. Three of these species -B. inermis Martins & Galileo, 2002, B. marica Galileo & Martins, 2000and B. piriana Martins, 1997 -are known to occur in Colombia (Botero 2015;Tavakilian and Chevillotte 2018).
In this work two new species of Beraba are described, B. anae sp. n. and B. angeli sp. n.; the male of B. limpida  is redescribed and the geographical distribution is expanded for 12 species. The key proposed by Botero (2015) for Beraba is modified to include the new species.

Material and methods
The material examined was obtained in Colombia, from the tropical dry forest in the Reserva La Flecha (RLF), Bolívar and the Reserva Campesina la Montaña (RCM), Atlántico. These locations were sampled from February to May 2018 by using a UV light trap, white light trap, manual capture, and the sampling was supplemented by visits to entomological collections.
The material currently resides in the following institutions, which are subsequently referred to by their acronyms: Photographs were taken with a Canon EOS Rebel T3i DSLR camera, Canon MP-E 65mm f/2.8 1-5× macro lens, controlled by Zerene Stacker focus stacking software. Measurements were taken in "mm" using a measuring ocular Hensoldt/Wetzlar -Mess 10 in the Leica MZ6 stereomicroscope, also used in the study of the specimens. References and geographical distributions were ascertained in Martínez (2000), Monné (2018) and Tavakilian and Chevillotte (2018)    slightly ahead of inner one; elytral costae absent. Apex of elytra truncate, with external spine, and a very small sutural spicule.
Variability. In the paratype (male), the posterior eburneous callosities start at the same point. The ventrite V is shorter and square-shaped in males, with apex truncate.
Etymology. The species epithet is in honor of Ana López Guerrero, mother of the first author, in appreciation of her love and support through all my life, the reason for all of my achievements.

Discussion.
Beraba anae sp. n. is similar to B. iuba Martins, 1997 (Figs 6-7) and B. moema  in having only one elliptical eburneous callosity at the anterior region of each elytron, tubercles of the pronotum concolor with remaining surface and posterior eburneous callosities starting at the same level. Beraba anae sp. n. differs from B. iuba in having the posterior eburneous callosities elliptical in shape and subequal in size (in B. iuba, the posterior callosities are more elongated and the inner one is shorter than the external one), spined elytral apex (unarmed in B. iuba), and in the long mesoand metafemoral spines, longer than the scape (shorter than the scape in B. iuba). Beraba anae sp. n. differs from B. moema in the surface of the pronotum smooth, eburneous callosities narrowed and subrounded, posterior callosities with similar size, elytral costae absent, and elytral apex truncate. In B. moema, the surface of pronotum is coarsely punctuate, eburneous callosities are narrowed with the posteroexternal at least twice length of the internal, the elytral costae are visible, and the elytral apex is obliquely truncate. Diagnosis. Surface of pronotum with wrinkles; pronotal tubercles black and wellelevated; males with sexual punctation on prosternum; femoral spines of same color as remainder; eburneous callosities with similar size; elytral apex with external spine.
Description. Male. Integument brownish orange, legs slightly lighter. Pronotal tubercles, posterior region of anterior eburneous callosity, and anterior and posterior region of posterior eburneous callosities black.
Body covered with long, erect and sparse yellowish setae.
Thorax. Prothorax (including lateral tubercles) longer than wide. Sides of prothorax with tubercles distinct and acute at apex. Surface of pronotum coarsely punctate with transverse wrinkles, more distinct on posterior half, with a few long sparse whitish setae. Pronotum with two anterior tubercles well elevated, rounded at apex, and a centro-longitudinal slightly elevated gibbosity. Prosternum with transverse sulcus, glabrous, with long yellowish setae, finely transversely striate, coarsely punctate on posterior half, with two well-defined areas of sexual punctation. Prosternal process expanded at apex, width at narrowest point equal to one fourth of procoxal cavity width. Pros- ternal process, meso-and metaventrite covered with dense golden pubescence, denser and longer laterally. Elytra about three times longer than prothorax; surface with moderately dense, coarse punctures on anterior half, finer and shallower toward apex. Each elytron with 3 subrounded eburneous callosities: one anterior; two posterior subfused, subequal, starting at same level, external slightly curved. Elytral costae absent. Apex of elytra truncate, with external spine and dentiform projection at sutural angle.
Abdomen. Ventrites finely sparsely punctate, sparser on median region; with a few moderately long, sparse yellowish setae. Apex of ventrite V truncate.
Etymology. The species epithet is in honor of Angel García Hernandez, father of the first author, as a thank you for all the support, love and happiness he has given to me.
Discussion. Beraba angeli sp. n. is similar to B. marica Galileo & Martins, 1999 (Figs 12-14) and B. inermis Martins & Galileo, 2002 in having only one elliptical eburneous callosity on the anterior region of each elytron, tubercles of the pronotum black, and surface of the pronotum only with wrinkles or with wrinkles and some interspersed punctures. Beraba angeli sp. n. differs of B. marica in having the pronotal tubercles distinctly elevated, prosternum with areas of sexual punctation (Fig. 11), and the male ventrites not modified (in B. marica the tubercles are slightly elevated, proster-num does not show sexual punctation, and ventrites II-IV show depressed areas with long yellowish setae on the posterior margin in males, as in Fig. 14). Beraba angeli sp. n. differs of B. inermis in the posterior eburneous callosities of similar size, and apex of the elytra with an external spine (in B. inermis, the posteroexternal eburneous callosities is, at least, twice the length of internal, and the external apex of the elytra is unarmed).
According to the most recent key to species of Beraba (Botero, 2015), the two new species can be inserted as follows:  (17)  Body covered with long, erect, sparse setae, denser on inner surface of tibiae, tarsomeres and basal antennomeres.
Head. Posterior region of head, scape and basal antennomeres with dense punctuation. Distance between upper lobes about three times width of upper lobe. Antennae exceeding elytral apices at apex of antennomere VIII. Prothorax (including lateral tubercles) 1.14 times longer than wide; lateral tubercles distinctly visible, acute at apex. Thorax. Surface of pronotum with coarse dense punctuation; with two anterior elevated tubercles rounded at apex. Prosternum smooth on central region, with long, erect setae and a few punctures, with evident sexual punctation at lateral sides concentrated on subrounded areas (Figs 16, 18). Coxae and mesoventral process covered with dense whitish pubescence. Meso-and metaventrite with long erect setae and covered with dense whitish pubescence laterally. Femora and tibiae fine and long; apex of meso-and meta-femora with long inner spine.
Elytra about 3.5 times longer than prothorax; surface with dense, coarse punctures basally, finer and shallow toward apex. Each elytron with three eburneous callosities: one basal, elliptical; two posterior, slightly elongated, inner one slightly smaller than external one, not distinctly separated from each other. Posteroexternal callosity about one fifth of elytral length, starting ahead of internal one. Elytral costae absent. Apex of elytra with external long spine, about 0.8 times as long as the pedicel and with acute sutural projection.
Discussion. Beraba limpida was described by  based on a single female specimen, and until now the male remained unknown. Among the known males of Beraba, just one species has sexual punctation, B. piriana . The sexual punctation in this species covers the entire prosternum and extends to the lateral region of the pronotum. Herein, we report sexual punctation for the first time in other two species of Beraba: B. limpida and B. angeli sp. n. In those species, the sexual punctation covers the entire surface of the pronotum, and is concentrated in subrounded areas on sides of the prosternum (Figs 9,11,16,18).
One specimen of Beraba tate Galileo & Martins, 2010 was illustrated by Galileo et al. (2008) as being B. limpida. Later, Galileo and Martins (2010) recognized that this specimen belongs to a new species, and described it as B. tate. However, Galileo et al. (2008) remains wrongly listed in the references on B. limpida (see Monné 2018;Tavakilian and Chevillotte 2018). In order to correct this error, we point out that this reference should appear on B. tate.    Geographical distribution. Panama, Colombia (Magdalena). New department records are added: Atlántico and Bolívar (Colombia).