Mirollia rumidi, Ingrisch, Sigfrid, 2011

Ingrisch, Sigfrid, 2011, New taxa of Mirolliini from South East Asia and evidence for an abdominal gland in male Phaneropterinae (Orthoptera: Tettigoniidae), Zootaxa 2943, pp. 1-44 : 14-15

Mirollia rumidi sp. n.

Figs. 2Q, 11F, 12E–F, 13E, 14J–L, 16E–F, 19C, 20K–L, 21C

Holotype (male): East Malaysia, Sabah: Sandakan District, Rumidi Estate, River Labuk [5°54'N, 117°30'E], 15–45 m, 14–30.ix.1973, leg. C.J.M. Pruett, depository: The Natural History Museum London ( BMNH).

Paratypes: 3 females, same data as holotype ( BMNH).

Diagnosis. The new species is similar to M. cerciata Hebard, 1922 , M. abnormis Karny, 1926 , and M. tawai sp. n. It differs by the shape of the male cerci that have the rather wide apex flattened and a thin, curved, subapical, internal process with acute tip; and by the shape of the phallus sclerites with a bottle-neck shaped central and elongate intermediate and lateral pairs of sclerites (see also discussion under M. tawai ). The phallus sclerites are similar to the situation in M. lata Gorochov, 2008 , but the apical areas of the external and the internal pairs of sclerites differ and a small third pair at base is absent; moreover the male cerci differ by the apex being truncate and the internal tooth thin and hook-shaped in M. rumidi , but the apex conical and the internal tooth broad lobiform with acute tip in M. lata . The female subgenital plate has longer apical lobes; but the difference is weak. Male cerci, subgenital plate and phallus sclerites also show a remote similarity the situation in M. hamata Ingrisch, 1998 from Thailand but with distinct specific differences.

Description. Fastigium verticis at base V-shaped; vertically descending; tip little upcurved (Fig. 11F). Pronotum with medial carina interrupted by second transverse sulcus; posterior margin weakly convex, almost truncate in middle; disc with rounded lateral angles; paranota little longer than deep.

Male. Stridulatory file on underside of left tegmen slightly concave and little sinuate; teeth at base very dense and indistinct, gradually getting little wider spaced to subapical area; at base with 16.5, in middle with 11.0, near apex with 7.1 teeth per 0.1 mm (Fig. 13E). Mirror on right tegmen in anterior area deeply depressed; 1.95 mm long, 1.39 mm wide; index length: width 1.41 (Fig. 12F). Second and third abdominal tergites setose in midline (Fig. 19C). Tenth abdominal tergite with apical margin broad triangularly excised. Epiproct triangular with dorsal furrow (Fig. 14L). Cerci surpassing tip of subgenital plate; at circa end of basal third internally swollen, afterwards curved laterad and mediad; apex bluntly truncate with thin, curved, acute, subapico-internal tooth (Fig. 14J). Subgenital plate with medial carina dissolved on medial projection; medial area prolonged with lateral carinae; apex short-triangularly excised (Fig. 14K). Phallus with two pairs of compressed sclerites (Figs. 16E–F): bottle-shaped lateral sclerites with crenulated dorsal and apical margins, and long central sclerites; basal area of latter strongly curved dorso-distad, knife-shaped with crenulated ventro-apical margin; apical part bottle-shaped, surpassing lateral sclerites; with crenulated dorso-apical margin.

Female. Subgenital plate in midline elevated with a fine medial furrow; apex with angular excision with truncate bottom; lateral lobes rounded (Figs. 20K, 21C). Ovipositor falcate (Fig. 20L).

Coloration. Green when alive. Scapus and pedicellus with black band on dorsal surface. Pronotum with two black dots on disc between first and second sulcus. Tegmen green with black dots mainly in posterior area and three rows with little larger black or in anterior area red dots (Fig. 2Q); stridulatory area with small brown spot from anterior margin to stridulatory vein (Fig. 12E). Fore tibia with tympanal area brown or reddish. Antennae indistinctly annulated.

Etymology. Named after the type locality; noun in apposition.

Measurements (1 male, 3 females). Body w/wings: male 21.5, female 26–27; body w/o wings: male 11, female 14–15; pronotum: male 3.5, female 3.5; tegmen: male 16.5, female 20–21; hind wing: male 18, female 22.0–23.5; hind femur: male 9.5, female 10–11; ovipositor: female 5.5 mm.