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Ibityraboia Mendes & Silva-Neto gen. nov. Figures 1–12 Type-species. Ibityraboia caraguata sp. nov. Grammatical gender. Feminine. Diagnosis. Fastigium-vertex proportionally small in relation to head (about 5x smaller). Basal half widened with small frontal triangular projection and narrow apical half, curved and acuminate, in lateral view (Fig. 2B). Tergite X with posterior margin expanded, forming two subtriangular projections slightly inward curved, in dorsal view (Fig. 2J). Cercus elongated, wide, anteriorly straight, and posteriorly inward curved; apical region with small curved internal spine with black apex; apex of cercus curved and acuminate, with a keel on the inner margin (Figs. 3I–J). Ejaculatory vesicle rounded (Figs. 5A–D). Titillator segmented as two large sclerites, anteriorly curved, opposing and posteriorly parallel straight (Figs. 5A–D). Ovipositor straight with apex of triangular. Description. Head dorsally with elongated fastigium-vertex, length equivalent to 1.5x the width of the base, in lateral view (Fig. 2D); basal half widened with small frontal triangular projection and narrow apical half, curved and acuminate, in lateral view (Fig. 2B). Globular eyes (Figs. 2B–D). Head laterally enlarged, gena with smooth margins, in frontal view (Fig. 2B). Pronotal disc rectangular, without carina, with several small rounded depressions, in dorsal view (Fig. 2C); Dorsal-lateral suture slightly curved (Figs. 2C–D). Furcal suture curved (Fig. 2C). Dorsal-lateral suture and furcal suture concolorous with pronotal disc (Fig. 2C). Tegmina narrow with rounded apex (Fig.3). Vein R slightly sinuous and with small branches, most of branches bifurcated near the apex (Fig. 3). Vein MP with three bifurcated branches reaching wing margin (Fig. 3). Vein MA with only one branch (Fig. 3). Vein CuP with one bifurcation and vein CuA with six bifurcated branches reaching wing margin (Fig. 3). Subcostal vein bifurcated near the apex (Fig. 3). Fore femur slightly sinuous, with apex narrower than the base, presence of three ventral spines and a pair of apical spines (Fig. 2F). Fore tibia straight, with partially closed tympanum and six pairs of spines in ventral region (Fig. 2F). Mid femur slightly sinuous, with four ventral spines and a small pair of apical spines (Fig. 2G). Mid tibia with enlarged basal half with eight pairs of small ventral spines (Fig. 2G). Hind femur enlarged at basal half, with seven long curved ventral spines and a small pair of apical spines (Figs. 2H). Hind tibia straight, narrow, with several small ventral and dorsal spines (Figs. 2H). All legs with short bristles (Figs. 2F–H). Tergite X with posterior margin expanded, forming two subtriangular projections slightly inward curved and with rounded apex, in dorsal view (Fig. 2J). Cercus elongated, wide, anteriorly straight, and posteriorly inward curved; apical region with small curved internal spine with black apex; apex of cercus curved and acuminate, with a keel on the inner margin (Figs. 2I–J). Subgenital plate elongated, medially narrow and apically bifurcated (Figs. 2I–J). Stylus small, ensiform-shaped and curved outward (Figs. 2I–J). Ejaculatory vesicle rounded (Figs. 5A–D). Titillator segmented as two large sclerites, anteriorly curved, opposing and posteriorly parallel straight (Figs. 5A–D). Apodemes sclerites large and narrow (Fig. 5A–D). Additional taxonomic notes. Ibityraboia gen. nov. appears most closely related with the type-genus of Copiphorini, Copiphora Serville, 1831. Copiphora currently has 26 Neotropical species and 1 Ethiopian species. The group needs taxonomic review and, therefore, we opt to compare the new genus with the type-species of Copiphora, Copiphora longicauda Serville, 1831 (Fig.1). Ibityraboia gen. nov. differs from Copiphora by having: fastigium-vertex almost 5x smaller than head (versus fastigium-vertex larger than head in Copiphora); fastigium-vertex curved in lateral view, and laterally rounded in frontal view (versus fastigium-vertex straight in lateral view, with two triangular lateral projections in frontal view in Copiphora); subgenital plate short, round, with two long projections on apex (versus subgenital plate elongated, sub-triangular, with two short projections on apex in Copiphora); concealed male genitalia anteriorly and posteriorly straight, laterally concave (versus internal male genitalia anteriorly acuminated, laterally and posteriorly elongated in Copiphora); ejaculatory vesicles rounded (versus ejaculatory vesicles ensiform in Copiphora); titillator segmented as two large sclerites (versus titillator segmented as two short sclerites in Copiphora). Etymology. The epithet is in apposition, Ibityraboia comes from the Brazilian indigenous language Tupi: Ibityra [ybytyra] = hill, mountain + boia [îyboîa] = jibóia, red-tailed boa (Boa constrictor), in reference to the Serra da Jiboia (Boa constrictor mountain). The epithet is a homage to the type locality of this new katydid. Distribution. Brazil (Bahia). |
