A proposal towards classification of the Raspy Crickets (Orthoptera: Stenopelmatoidea: Gryllacrididae) with zoogeographical comments: An initial contribution to the higher classification of the Gryllacridines
Author
Cadena-Castañeda, Oscar J.
text
Zootaxa
2019
4605
1
1
100
journal article
26811
10.11646/zootaxa.4605.1.1
3ebee944-1e6e-45d8-bba7-986581409c12
1175-5326
2860485
AB5FDA5F-BB38-4C7F-8604-2C87C848F901
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.