Mikrohyperbaenus Cadena-Castañeda, 2021

Cadena-Castañeda, Oscar J., Araujo-Peña, Ío, Rubiano-Guzman, Milton & Díaz, Carlos Julio Arango, 2021, Studies on Raspy Crickets: A new Andean Hyperbaenini genus (Orthoptera Gryllacrididae: Hyperbaeninae), Zootaxa 4969 (1), pp. 183-190 : 184-186

Mikrohyperbaenus Cadena-Castañeda n. gen.

http://lsid.speciesfile.org/urn:lsid: Orthoptera .speciesfile.org:TaxonName:513323

Taxa included. Mikrohyperbaenus guane n. sp. by original monotypy and designation.

Etymology. The name is the combinations of the Greek words μικρός (Mikros: little) and υπερβαινω ( Hyperbaenus , type genus of the tribe, with meaning from Greek to English of “across, beyond” + “walk; advance”). The name of this genus focuses on the small size of the species described here, in contrast to the other species of the tribe, such as a little Hyperbaenus . The gender of the name is being established as neuter.

Description. Small-sized (body length 11 mm) and slender ( Fig. 1A, B ). Coloration. Light yellow with some brown spots on the head and abdomen. Head. Space between antennal sockets 1.5 times the wider than the antennal scape; median and lateral ocelli ovoid, reduced with a diffuse edge; maxillary palps elongated with similar thickness, labial palpi reduced and robust ( Fig. 2A, B ). Thorax. Pronotum narrow and smooth, with quadrangular disc and lateral lobes ( Fig. 2C, D ); humeral notch moderately developed ( Fig. 2C ); auditory spiracle below the lower margin of the lateral lobe of the pronotum armed with a tubercle. Sternum lobes are rounded and narrow, without prolongations. Legs. Fore coxa armed with a spine dorsally. Fore and mid femora unarmed; fore and mid tibiae with four spines on each ventral margin and one spine on each side of the ventral-apex ( Fig. 2B ); hind femur slightly robust ( Fig. 1D ); hind tibia armed with small spines dorsally, apex with three spurs on each side, being the dorsal one the most conspicuous. Wings. Rectangular and widely exceeding the apex of the abdomen and hind femur ( Fig. 1B ). Abdomen. Stridulatory apparatus present, located on each side of the first and second abdominal tergite ( Fig. 2C ). The ninth tergite covering the tenth tergite, rounded, smooth, and with the distal portion in two sub-rectangular lobes, the distal edge of the lobes armed with small, sclerosed, and triangular denticulations (Fig. 3A, B). Cerci simple and without branches (Fig. 3A). Subgenital plate without styli (Fig. 3C). Phallic complex. Membranous, lw.vl. finger-like, ejaculatory duct wide and prominent (Fig. 3D-F).

Female. Unknown.

Distribution. North Colombian Andes.

Comparison. This new genus differs from the other Hyperbaenini taxa by its small size, pale yellow coloration, reduced hooks, and denticulate distal lobes of the tenth tergite. From each genus it differs by the following characteristics: differs from Dibelona by not having prolonged and conspicuous spines on the hind tibia and reduced hooks, in contrast, Dibelona has some elongated spines on the hind tibia, and its hooks are conspicuous and elongated. The new genus is more similar to Hyperbaenus , although the Hyperbaenus species have an ocher yellow color, they tend to have elongated fore tibial spines and although the modifications of the ninth or tenth tergite are diverse, they do not have denticulate distal lobes as Mikrohyperbaenus n. gen.

Figures

FIGURE 1. Mikrohyperbaenus guane n. gen et n. sp. Habitus A. Lateral and B. Dorsal view.

FIGURE 2. Mikrohyperbaenus guane n. gen et n. sp. A-B. Frons and fore legs. C. Head, thorax and first abdominal tergites in lateral view. D. Head and pronotum in dorsal view. E. Wing venation.