Angustogryllacris bibulbata, 2018

Ingrisch, Sigfrid, 2018, New taxa and records of Gryllacrididae (Orthoptera, Stenopelmatoidea) from South East Asia and New Guinea with a key to the genera, Zootaxa 4510 (1), pp. 1-278 : 111-113

publication ID 10.11646/zootaxa.4510.1.1

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scientific name

Angustogryllacris bibulbata

sp. nov.

Angustogryllacris bibulbata View in CoL sp. nov.

Figs. 37 View FIGURE 37 A–M

Material examined. Holotype (male): East Malaysia: Sabah, Mt. Kinabalu, Poring , elev. 500–700 m (6°5'N, 116°33'E), 28.i.1993, leg. A. Floren (tree nr. 62)—(Bonn ZFMK). GoogleMaps

Other specimens: East Malaysia: Sabah: same locality as holotype, 28.i.1993, leg. A. Floren (tree nr. 62)— 1 female (paratype) (Bonn ZFMK); same locality, 12.ii.1993, leg. A. Floren (tree nr. 9)— 2 females (paratypes) (Bonn ZFMK) ; Bergil, (6°13'7.21''N, 116°44'13.54''E), 2006, leg. A. Floren (tree B7)— 1 female (paratype) (Bonn ZFMK) GoogleMaps ; same locality, 2006, leg. A. Floren (tree B42)— 1 female (paratype) (Bonn ZFMK) GoogleMaps .

Diagnosis. This is so far the only species of the genus Angustogryllacris . The diagnostic characters are already mentioned in the generic diagnosis.

Description. Small to medium sized species. Head: Face not particularly large; in frontal view roughly oval; forehead nearly smooth; fastigium verticis about as wide as scapus; ocelli indistinct ( Fig. 37D View FIGURE 37 ). Abdominal tergites two and three each with two rows of stridulatory pegs (5–7, 9–14; 12–13, 15–17; n = 1 male, 4 females; Fig. 37L View FIGURE 37 ).

Wings shortened, lanceolate; not overlapping dorsally ( Figs. 37 View FIGURE 37 A–C). Tegmen little shorter or longer than abdomen but not fully reaching hind knees; venation of tegmen little variable: RS divides rather late from radius stem, only one of both veins forked at tip or both veins unforked; media anterior free from base but at very base with a common stem with cubitus anterior, sometimes common stem prolonged to subbasal area; media posterior arises from MA or absent; cubitus posterior with separate stem, single branched, free throughout; with three, rarely four anal veins.

Legs: Fore coxa with small spine at fore margin; fore and mid femora unarmed; fore and mid tibiae with four pairs of large ventral spines and one pair of smaller ventral spurs; hind femur with 4–7 external and 12–16 internal small spines on ventral margins, little increasing in size towards posterior end; hind tibia with few small spaced spines on both dorsal margins increasing in size from base to end, on external margin only spines in apical area, on internal margin over whole length, ventral margins with one pre-apical spine each; with 3 apical spurs on both sides.

Coloration. General color unicolored pale brownish (originally conserved in alcohol); with some black ornaments on apical segments of abdomen, hind femur and tibiae. Face unicolored yellowish brown. Tegmen yellowish transparent, veins of about same color; hind wing whitish transparent with yellowish veins.

Male. Ninth abdominal tergite with lateral margins strongly narrowing posteriorly, in about apical third nearly parallel-sided and in dorsal view apically truncate; on each side of apical margin with a short bulbous projection bent ventrad and carrying at tip a sickle-shaped, black process ( Figs. 37H View FIGURE 37 , J–K). Subgenital plate little wider than long, with lateral margins convex, apical margin concave; styli small, sitting at latero-apical angles of plate ( Fig. 37I View FIGURE 37 ). Phallus membranous.

Female. Seventh abdominal sternite with lateral areas membranous; sclerotised part narrower than preceding sternites and roughly shaped like an "8": in middle constricted and furrowed, basal and apical area wider; on each side at base of apical widening with a black oval pit open anteriorly ( Figs. 37 View FIGURE 37 E–G). Subgenital plate in roughly basal half or more membranous, striated; apical area bent ventrad, forming a convex bulge. Ovipositor long and nearly straight, only in subbasal area little curved; about as long as or little longer than hind femur; at tip suddenly narrowing, subacute ( Fig. 37M View FIGURE 37 ).

Measurements (1 male, 5 females).—body w/wings: male 14.5, female 16–30; body w/o wings: male 14, female 11–30; pronotum: male 2.8, female 2.5–3.2; tegmen: male 10.5, female 10.5–12.0; tegmen width: male ca 3 (curled), female 3.5; hind femur: male 9, female 9.8–11.0; antenna: male 80, female 70–90; ovipositor: female 10.5–12.0 mm.

Etymology. The name of the new species refers to the double swelling of the seventh abdominal sternite of female; from Latin bi- (two) and bulbos (bulb, swelling).


Zoologisches Forschungsmuseum Alexander Koenig

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