Duolandrevus (Bejorama), 1906

Tan, Ming Kai & Wahab, Rodzay Bin Haji Abdul, 2017, New taxa and notes on crickets of the subfamily Landrevinae (Orthoptera: Gryllidae) from Brunei Darussalam, Borneo, Zootaxa 4365 (4), pp. 440-454 : 442

Duolandrevus (Bejorama) nr. luzonensis Otte, 1988

( Figs. 1 , 2 )

Material examined. 1 male (KB.17.30): Brunei Darussalam, Ulu Temburong, Kuala Belalong Field Studies Centre, along Ashton Trail , primary ridge dipterocarp forest, calling inside hanging dead leaves on tree, N4.54629, E115.15684, 122.5 ± 6.8 m, 7 January 2017, 1954 hours, coll. M. K. Tan ( ZRC).

Remarks. Our single male specimen ( Fig. 1A ) belongs to the subgenus Bejorama Otte, 1988 on the basis of the distinct stridulatory apparatus ( Fig. 1B ), presence of strong setae along posterior edge of male anal plate ( Fig. 1C ), and lack of distinct transverse fold and dorsal denticle on epiphallus ( Fig. 2 ).

It has similar male genitalia and tegminal venation to that of Duolandrevus luzonensis Otte, 1988 from Luzon Island, Philippines as illustrated in Otte (1988). While this may indicate a new locality record for the Filipino species, there are however still some slight differences: our male specimen has a reduced anal area of the tegmen and with mirror much broader than long ( Fig. 1B vs. Fig. 1E ); posterolateral epiphallic lobe more slender (when viewed dorsally and laterally) and with ventral process more elongated ( Fig. 2 ).

Owing to the lack of further information, we tentatively identify the specimen to be close to D. luzonensis .

Figures

FIGURE 1. Duolandrevus (Bejorama) nr. luzonensis Otte, 1988 male: dorsal habitus (A), tegmen in dorsal view (B), abdominal apex in dorsal view (C) and, metanotal gland in dorsal view (D) from Brunei Darussalam; tegmen from Otte (1988: Fig.21A) (E).Scale bars:5 mm (A), 1 mm (B–D).

FIGURE 2. Duolandrevus (Bejorama) nr.luzonensis Otte, 1988 male genitalia:dorsal (A, D), ventral (B, E) and profile (C, F) views from Brunei Darussalam (A–C) and Otte (1988: Fig.9C) (D–F).