Brunnergryllacris Cadena-Castañeda, 2019

Cadena-Castañeda, Oscar J., 2019, A proposal towards classification of the Raspy Crickets (Orthoptera: Stenopelmatoidea: Gryllacrididae) with zoogeographical comments: An initial contribution to the higher classification of the Gryllacridines, Zootaxa 4605 (1), pp. 1-100 : 30

Brunnergryllacris Cadena-Castañeda n. gen.

Diagnosis: Small size for the family (12–14 mm) ( Figs. 105–107 ). Head with median and lateral ocelli inconspicuous, space between antennal sockets 1.5 times as wide as scape; fore coxa without spines, legs moderately short and robust with three pairs of movable ventral spines on fore and mid tibiae, with rather numerous small unarticulated spines of hind tibiae. Wings completely developed and cycloid tegminae. Abdomen without traces of femoro-abdominal apparatus; 9 th tergite without modification, 10 th abdominal tergite of the male, modified in two distal rounded lobes and a wide notch in the middle, small and ovate epiproctus; paraproctus armed with an incurved hook; male subgenital plate large, notch with a median prolongation convex, with short styli ( Fig. 108 ), cerci short and conical. Female abdomen without specialized tergites; subgenital plate of the female, slightly dentate at the apex, ovipositor smooth, as long as the abdomen and up curved from the base.

Included species: Type species: Brunnergryllacris testaceus ( Chopard, 1954) n. comb. and B. eximia ( Karsch, 1891) n. comb. (before placed into Niphetogryllacris ).

Etymology: Dedicated to the memory of Carl Brunner von Wattenwyl as a recognition to his great contributions to raspy crickets and their allies, plus typical termination— gryllacris common to genera of this family.

Comparison: This new genus is very close to Karnygryllacris n. gen., differs from the numbers of ventral spines of fore and mid tibiae (three to Brunnergryllacris n. gen. and four to five to Karnygryllacris n. gen.), the 10 th tergite of the new genus its modified in two distal lobes, in contrast to Karnygryllacris n. gen., without the lobes. The middle prolongation of the distal margin from subgenital plate (common to the Progryllacridini males), is convex in Brunnergryllacris n. gen. and triangular shaped in Karnygryllacris n. gen. The females from the two genera are very similar, differing in the numbers of ventral spines from the males, and by the apex subgenital plate shape.

Brunnergryllacris n. gen., differs from others Progryllacridini genera: number and developed the spines of fore and middle tibiae, this genus has the longer and less numerous spines of all Progryllacridini genera; the modification of the 10 th male tergite from this genus is unique in the tribe.

Distribution: The known species are from Guinea and Cameroon, in west African coast.

Comments: This genus has only two species, but maybe more unknown species could occur in adjacent countries and other continental regions of Africa.

Figures

FIGURES 105–108. Brunnergryllacris n. gen. 105–106. Habitus lateral and dorsal of B. eximia n. comb. (Photos by Sigfrid Ingrisch). 107–108. Habitus and male subgenital plate of B. testaceus n. comb.