Eremus geniculatus Brunner von Wattenwyl, 1888

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 : 178

publication ID 10.11646/zootaxa.4510.1.1

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Eremus geniculatus Brunner von Wattenwyl, 1888


Eremus geniculatus Brunner von Wattenwyl, 1888 View in CoL stat. reest.

Figs. 60 View FIGURE 60 I–J, 61G–K

Karny 1928f as synonym of Neanias (Eremus) basalis Walker, 1869

Material examined. India, Karnataka state, Madikeri [as " East India, Mercara, leg. Werner, 1880"]— 1 female, 2 males (paratypes as cotypes) (Stuttgart ( SMNS)) ; India: Merkara, from Museum Stuttgart— 1 female (type BrW17.124) (Wien NHMW) .

Description. Face finely rugose; black with red brown spots ( Fig. 61G View FIGURE 61 ). Apter, meso- and metanotum with weak lateral expansions but without clear traces of wings ( Fig. 61J View FIGURE 61 ).

Male. Ninth abdominal tergite globular, at apical margin with a pair of narrow styliform projections ( Fig. 61K View FIGURE 61 ). Tenth abdominal tergite narrow band shaped, little widened towards and grooved in midline. Subgenital plate with apical margin projecting between bases of styli; projecting part laterally concave, at tip narrow truncate, not fully reaching tip of styli.

Female. Seventh abdominal sternite with a pair of small pits in posterior area; following intersegmental membrane with a groove. Subgenital plate with a triangular central and smaller and shorter lobular lateral lobes ( Figs. 61 View FIGURE 61 H–I). Ovipositor slightly curved; tip simple, subacute ( Fig. 60I View FIGURE 60 ).

Discussion. This species had been synonymised by Karny (1928f) under Neanias (Eremus) basalis ( Walker, 1869) . He probably had not seen the holotypes of both species in direct comparison, both are females. Although the shapes of the subgenital plates of both females are similar with a large, roughly triangular central lobe and a pair of smaller lateral lobes, the central plate of E. geniculatus is triangular with a nearly subacute tip ( Fig. 61H View FIGURE 61 ), while in E. basalis it is more lobular with the tip obtuse ( Fig. 61F View FIGURE 61 ). More specific differences can be found in the seventh abdominal sternite, which has in E. basalis a short appendage in middle with strongly stiffened margins and a groove in middle and laterally of that appendage, the apical margin of the sternite is also grooved ( Fig. 61F View FIGURE 61 ). In E. geniculatus the seventh sternite has a pair of small pits in apical area and the apical margin is simply convex, but there is a groove in the intersegmental membrane between the sternite and the subgenital plate ( Fig. 61 View FIGURE 61 H–I). Moreover, the ovipositor is distinctly shorter than in E. basalis .


Staatliches Museum fuer Naturkund Stuttgart


Naturhistorisches Museum, Wien













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