New taxa and records of Gryllacrididae (Orthoptera, Stenopelmatoidea) from South East Asia and New Guinea with a key to the genera
Author
Ingrisch, Sigfrid
text
Zootaxa
2018
2018-11-05
4510
1
1
278
journal article
27991
10.11646/zootaxa.4510.1.1
f3128a32-5f0b-413e-a755-c859bdd7cac4
1175-5326
10072806
EAA35595-0972-4CF8-A128-16267A59112B
Eugryllacris serricauda
sp. nov.
Figs. 2E
,
4E, 4J
,
5B
,
6
E–F, 7E, 9L, 100A
Material examined.
Holotype
(male):
Thailand
:
Nakhon Nayok
,
Khao Yai
, elev.
700 m
(
14°23'N
,
101°23'E
),
15– 18.x.1990
, leg. S. Ingrisch—
1 male
(Bonn
ZFMK
).
Other specimens: Same locality as
holotype
,
5.iv.1995
, leg. S. Ingrisch—
1 female
(
paratype
) (Bonn ZFMK).
Diagnosis.
E. serricauda
is the so far only species of the genus, in which the projections of the male ninth abdominal tergite are not tooth- or spine-like but disc-shaped with serrate margin; below that disc there is a small inconspicuous tooth (
Figs. 6
E–F).
Description.
Large species (
Figs. 4E, 4J
). Head: Face ovoid; fastigium verticis about twice as wide as scapus; ocelli indistinct; fastigium frontis separated from fastigium verticis by a very fine suture; a pair of distinct subantennal furrows, starting at internal angle of antennal scrobae, separates the central area of face from the lateral areas and fuse ventrally with clypeo-frontal suture; clypeo-frontal suture interrupted in middle; subocular furrows also distinct (
Fig. 5B
). Abdominal tergite three only with extremely minute stridulatory pegs.
Wings reaching about tip of stretched hind tibiae (
Fig. 4E
). Tegmen: Radius with two branches, both forked near tip; media anterior fused in basal area with radius; media posterior absent; cubitus anterior forks before midlength into two veins, CuA1 and CuA2; cubitus posterior undivided, free throughout; with 5 anal veins.
Legs: Fore coxa with a rather large spine at fore margin; fore and mid femora unarmed; fore and mid tibiae with four pairs of large, on mid tibiae comparatively short, ventral spines and one pair of smaller ventral spurs; hind femur with 5–10 external and 6–7 internal spines on ventral margins; hind tibia with spaced spines on both dorsal margins, ventral margins with one pre-apical spine each; with 3 apical spurs on both sides.
Coloration. General color uniformly green when alive (
Fig. 100A
); vertex unicolored; disc of pronotum unicolored, hind margin hardly darker. Legs of general color. Face unicolored green; eyes red brown; basal angles of clypeus black (female) or green and clypeo-frontal sutures darkened (male). Tegmen semi-transparent white with green veins; in center yellowish infumate; hind wing semi-transparent white with green veins; apart from marginal areas cells with large dark brown spots.
Male. Ninth abdominal tergite semi-globular: prolonged and down-curved laterally and apically; in descending posterior area furrowed in midline and before apex split and granular, on both sides of the split area with a small disc with granular margin and below that disc with a fine styliform projection, both projecting mediad (
Figs. 6
E– F). Epiproct and paraproctes distinct. Subgenital plate almost twice as wide as long; apical margin wide, slightly obtuse-triangularly excised; styli inserted laterally at apical margin. Phallus membranous.
Female. Seventh abdominal sternite together with its apical projection appearing triangular with rounded angles; apical projection covering centro-basal area of subgenital plate. Subgenital plate elongate triangular with rounded apex; only margin and a small area at tip sclerotised, remainder membranous and shallowly grooved (
Fig. 7E
). Base of ovipositor with a small sclerite before base of ventral valves. Ovipositor of medium length, distinctly but not strongly curved dorsad, margins slightly and gradually narrowing towards tip; dorsal margin with a slight expansion before tip (
Fig. 9L
).
Measurements (
1 male
,
1 female
).—body w/wings: male 54, female 58; body w/o wings: male 36, female 43; pronotum: male 8, female 9; tegmen: male 40, female 42; tegmen width: male 16; hind femur: male 18, female 19; antenna: male 110; ovipositor: female
17 mm
.
Etymology.
The name of the new species refers to the apical projections of the male ninth abdominal tergite. From Latin
serre
(serrated) and
cauda
(tail).