Baryssiniella Berkov and Monné

Berkov, Amy & Monné, Miguel A., 2010, A new species of Neobaryssinus Monné & Martins, and two new species of Baryssiniella new genus (Coleoptera: Cerambycidae), reared from trees in the Brazil nut family (Lecythidaceae), Zootaxa 2538, pp. 47-59 : 51-52

Baryssiniella Berkov and Monné , new genus

Type species: Baryssiniella hieroglyphica Berkov and Monné , new species

Description. Superior lobes of eyes separated by width of one lobe; inferior lobe more than twice depth of gena. Antennae with 11 antennomeres, unarmed in both sexes. Prothorax wider than long, disk without tubercles or gibbose areas, lateral tubercles postmedial, obtuse and terminating in small points, coarse punctures restricted to basal impression. Scutellum triangular, truncate at apex, raised above base of elytra. Elytra with erect setae, lateral carinae lacking, slight central basal gibbosity with dark setae, coarse punctures in at least basal half, apices obliquely truncate with sutural angles rounded. Prosternal process approximately one-fourth width of procoxa or less, mesosternal process approximately same width as mesocoxa. Femora clavate, first metatarsomere approximately 1.5 × times as long as second and third together. Males: moderate to dense erect pubescence covering, at minimum, medial mesosternum, metasternum, first abdominal segment, and interior sides of coxae. Abdomen with apical sternite semicircular (to truncate) and apical tergite emarginate. Pro- and mesofemora at least somewhat enlarged, carina on mesotibiae. Females: erect ventral pubescence lacking, most of surface covered with appressed pubescence, apical sternite semicircular (truncate), may or may not extend beyond apex of elytra. Pro- and mesofemora not enlarged.

Comments. Baryssiniella is characterized by sexual dimorphism in ventral pubescence and anterior leg morphology, and setose elytra with, at most, a slight central basal gibbosity ( Fig. 8 ). Baryssiniella lacks central basal cristae and the lateral carinae that characterize Baryssinus , Neobaryssinus , and Neoeutrypanus . Palame , Neopalame Martins & Monné , and Xylergates also lack central basal cristae and lateral elytral carinae. Baryssiniella lacks the gibbose pronotum and tuberculate elytra of Xylergates ( Giorgi & Corbett 2005) , and differs from Palame and Neopalame in having shallower genae (less than half the depth of the lower lobe of the eye) and more pronounced lateral pronotal tubercles. In addition, males of Palame and Neopalame often have a hook at the apex of antennomere 5 or 6 ( Martins & Monné 1972), while males of Baryssiniella lack protuberances on any antennomere. We also compared Baryssiniella to Onalcidion Thomson. Onalcidion males lack erect ventral pubescence, and both sexes differ from Baryssiniella in that elytral length exceeds twice the width at the humeral angles, hind legs were comparatively pedunculate, and the first tarsomere on the hind legs was approximately twice as long as the next two tarsomeres combined.

Etymology. The generic name is feminine, and was selected because the two included species are similar to Neobaryssinus Monné & Martins , but much smaller; hence the diminutive suffix.

Figures

FIGURES 7 – 8. Lateral views of Neobaryssinus and Baryssiniella: 7, N. marianae Martins & Monné, male, with distinct central basal cristae; 8, B. hieroglyphica Berkov & Monné, male, with a slight central basal gibbosity.