Singapuriola separata Gorochov et Tan

Gorochov, Andrej V. & Tan, Ming Kai, 2012, New crickets of the subfamilies Phaloriinae and Pteroplistinae (Orthoptera: Gryllidae) from Singapore, Zootaxa 3525, pp. 18-34 : 28-31

Singapuriola separata Gorochov et Tan , new species

( Figs 13–16 , 21–23 , 44–50 )

Material examined. Holotype (male): Singapore, Bukit Timah Nature Reserve, Belukar Track, secondary forest, stridulating within hollow branch, 3 April 2012, coll. M.K. Tan, R.W.J. Ngiam & J.J.Y. Chan.

Paratypes: Singapore: 2 males, 1 female, Central Catchment Nature Reserve, Eco-link, secondary forest, males stridulating within hollow branch and females walking on bark, 16 May 2011, 27 January 2012, 18 June 2012, coll. M.K. Tan, R.W.J. Ngiam & Y.F. Chung.

Description. Male holotype. Body well pubescent. Pronotum weakly transverse, very weakly widening posteriorly; anterior and posterior margins of pronotal disc fairly straight ( Fig. 44 ). Inner tympanum as in Fig. 13 ; traces of outer tympanum absent; apex of fore tibia with 1 inner spur.

Tegmina with mirror somewhat wider than long, with 6 oblique veins in dorsal field; lateral tegminal field with about 16 branches of Sc and 10 crossveins between R and M (as in Fig. 46 ); stridulatory vein of right tegmen substraight but arcuate medially. Subgenital plate as in Fig. 14 ; genitalia with epiphallus having short median part and small medial tubercle on inner side of each posterolateral lobe, with anterolateral parts of guiding rod sclerites bordered by a pair of large sclerotized plates characteristic in shape (as in Figs 21, 22 , 47–49 ), and with mold of spermatophore attachment plate as in Fig. 23 .

Colouration. Brown with following marks: head, pronotum and abdomen with rufous tinge; thoracic sternites light brown; hind legs with distal femoral area, knee, and tibia dark rufous; tegmina light brown but mottled darker brown between longest oblique vein of dorsal field and mirror, between R and M, and in apical area.

Variations. Right tegmina of paratypes with 4–6 oblique veins in dorsal field.

Female. Coloration and structure of body similar to male, however terminal dorsal field ( Fig. 45 ) with 5 partly oblique longitudinal veins and with not numerous and slightly irregular crossveins (some of these crossveins rather long and situated almost longitudinally), lateral field with 5-6 branches of Sc (some of them forked and intersect with each other), anal plate basally with medial depression narrowing into furrow distally; subgenital plate wide but gradually narrowing backwards, with almost widely truncate apex having shallow and rather wide posteromedian notch ( Fig. 15 ). Ovipositor dark rufous, distinctly arcuate in profile, with middle part rather high (wide) and distal third gradually narrowing to acute apex ( Fig. 16 ).

Measurements. See Table 4 .

Etymology. Species name is Latin word “ separata ” (= separated).

Remarks. Calling song was recorded in-situ on 2 February 2012 at about 2015 hours. The calling song is a continuous trill with frequency of about 5.5 kHz ( Fig. 50 ). Each single trill consists of one distinct isolated pulse, lasting 0.012– 0.014 s (mean = 0.013 s). Pulse rate is 30–40 s -1.

Figures

FIGURE 50. Calling song of Singapuriola separata gen. et sp. n. (Pteroplistinae).

FIGURES 7 – 16. Phaloriinae and Pteroplistinae (schematically): 7, 8, Trellius neesoon sp. n. (7, holotype; 8, paratype); 9, 10, Tremellia timah sp. n. (9, paratype; 10, holotype); 11, 12, Phaloria? jerelynae sp. n., holotype; 13 – 16, Singapuriola separata sp. n., paratypes. Inner side of fore tibia (7, 9, 11, 13); male subgenital plate from below (8, 10, 12, 14); female subgenital plate with base of ovipositor from below (15); ovipositor from side (16). Scale bars 1 mm.

FIGURES 17 – 24. Phaloriinae and Pteroplistinae, male (schematically): 17, 18, Trellius neesoon sp. n., holotype; 19, 20, Phaloria? jerelynae sp. n., paratype; 21 – 23, Singapuriola separata sp. n., paratype; 24, Tremellia timah sp. n., holotype. Genitalia from above (17, 19, 21) and from below (18, 20, 22); mold of spermatophore attachment plate from behind and slightly above (23); ectoparamere from below (24).

FIGURES 44 – 49. Singapuriola separata gen. et sp. n. (Pteroplistinae): 44, holotype; 45 – 49, paratypes. General view of male from above (44), and of female in living condition (45); right male tegmen (46); male genitalia from side (47), from above (48), and from below (49). Scale bars 5 mm for Fig 44; 1 mm for Fig. 46.