Gryllotalpa wallace Tan

Tan, Ming Kai, 2012, New species and redescriptions of mole crickets (Orthoptera: Gryllotalpidae: Gryllotalpinae) from Singapore, with key to Singaporean species, Zootaxa 3389, pp. 51-60 : 57

publication ID 10.5281/zenodo.211999


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scientific name

Gryllotalpa wallace Tan

new species

Gryllotalpa wallace Tan , new species

( Figs. 2 View FIGURE 2 C, 2 D, 2 H; 3 D– 3 F; 5)

Material examined. Holotype (male): Singapore, Bukit Timah Nature Reserve, along Dairy Farm Loop, secondary forest, coll. M. K. Tan, 2 Apr. 2011 ( ZRC).

Diagnosis. See key.

Description. Habitus typical of this genus ( Fig. 5 View FIGURE 5 ). Habitus characteristics rather similar to Gryllotalpa nymphicus . Ocelli medium. Pronotum oval, about 1.3 times longer than wide (n= 1); with longitudinal medial furrow incomplete, distinct from slightly midpoint to the posterior end; otherwise similar. Process of anterior trochanter similar. Dactyls of anterior tibiae similar. Anterior tibiae with internal tympanum slit-shaped. Wings similar. Hind tibia armed with 3 internal subapical spines.

Male. Tegmen 1.3 times longer than wide (n= 1), reaching end of the 6 th abdominal tergite. Venations of right tegmen in dorsal and ventral views as shown in Figs. 2 View FIGURE 2 C & 2 D respectively; harp with medial area and distal area broader, with distal margin obtuse and round; cell 2 small, pentagonal with CuPaα 2 gently curved, longer than wide, much less wide than harp at distal end; otherwise, description similar to Gryllotalpa nymphicus . Stridulatory file substraight, anterior and posterior ends slightly arched distally; with about 15 teeth (n= 1); teeth densely distributed at the anterior end, very sparsely distributed at the posterior end and medial region ( Fig. 2 View FIGURE 2 H).

Genitalia as shown in Fig. 3 View FIGURE 3 D– 3 F, rather similar to Gryllotalpa nymphicus . Transverse sclerite of epiphallus wide U-shaped centrally ( Fig. 3 View FIGURE 3 D); with a pair of very short median branches pointing dorsally with subacute apices; with a pair of narrow lateral branches, smoothly curved ventrally, hooked dorso-anteriorly at the apex, apically slightly hyaline, with subacute apices ( Fig. 3 View FIGURE 3 E). Median prolongation of epiphallus narrow; with a pair of hook-like lobes on anterior surface; concave at both lateral margins, strongly widening towards apex; flattened in dorsal surface, sharply and fairly deeply emarginated posteriorly ( Fig. 3 View FIGURE 3 E). Paramere of ectophallus as shaped in Fig. 3 View FIGURE 3 F in ventral view; obliquely U-shaped in anterior view; internal process of ectophallus paramere pointing anterio-dorsally, apex subacute ( Fig. 3 View FIGURE 3 D).

Female. Unknown.

Colouration. Overall dark brown to black. Head, pronotum anterior and posteior margins near black. Abdominal sternites and thorax yellow brown to brown. Abdominal apex near black. Legs tend to be lighter brown. Dactyls in the anterior tibiae black apically.

Measurements (holotype, male). BL: 30.7, PL: 9.7, PW: 7.2, RTL: 11.4, RTW: 8.9, HFL: 9.9, HTL: 6.8, SFL: 4.1 mm.

Etymology. The species is named after Alfred Russel Wallace ; noun in apposition. The type locality is near to the Wallace Education Centre, Dairy Farm Nature Park.


Zoological Reference Collection, National University of Singapore