Gerax fuscum Brindle, 1974

Girod, Christophe & Matzke, Danilo, 2020, Annotated checklist of the Dermaptera (Insecta) of French Guiana, Zoosystema 42 (4), pp. 57-76 : 66

Gerax fuscum Brindle, 1974

( Fig. 7B )

Gerax fuscum Brindle, 1974: 112 .

TYPE SPECIMEN. — El Barrioso, Rio Matu, Venezuela, Bolivar, 6.I.1972, leg. J. Salcedo, MIZA [type pictures studied] .

MATERIAL EXAMINED. — 35 specimens ( Fig. 7 B ) .

French Guiana • 1 ♀; Saül; 13.XII.2011; SEAG com.; coll. CGIR • 1 adult; Camopi ; Mont Saint-Marcel; 635 m a.s.l.; 2°23’3"N, 53°0’37"W; 21.IX.2014; SEAG com.; coll. CGIR • 1 adult; same locality; 26.IX.2014; SEAG com.; coll. CGIR • 1 ♀; Montsinéry- Tonnégrande; Montagne des Chevaux ( Montagne Yéyé ), RN2 PK22; 100 m a.s.l.; 4°44’34.3”N, 52°25’53.51”W; 16.VII.2011; SEAG com.; coll. CGIR • 1♀; same locality; 14.VIII.2011; SEAG com.; coll. CGIR • 3 ♀; same locality; 18.IX.2011; SEAG com.; coll. CGIR • 1 ♀; same locality; 8.X.2011; SEAG com.; coll. DMAT • 1 ♀; same locality; 10.III.2012; SEAG com.; coll. CGIR • 1♂; same locality; 4.V.2013; SEAG com.; MNHN • 1 ♂; same locality; 8.VI.2013; SEAG com.; coll. CGIR • 1 ♂; same locality; 24.VIII.2013; SEAG com.; coll. CGIR • 1 adult; same locality; 7.IX.2013; SEAG com.; coll. YKAM • 1 adult; same locality; 28.IX.2013; SEAG com.; coll. CGIR • 1 adult; same locality; 26.X.2013; SEAG com.; coll. CGIR • 1 adult; same locality; 10.XI.2013; SEAG com.; coll. CGIR • 1 adult; same locality; 16.XI.2013; SEAG com.; coll. CGIR • 1 adult; same locality; 30.XI.2013; SEAG com.; coll. DMAT • 1 ♀; same locality; 7.XII.2013; SEAG com.; coll. CGIR • 1 adult; same locality; 24.V.2014; SEAG com.; coll. CGIR • 1 adult; same locality; 28.VI.2014; SEAG com.; coll. CGIR • 2 ♂; same locality; 19.VII.2014; SEAG com.; coll. CGIR • 2 adults; same locality; 26.VII.2014; SEAG com.; coll. CGIR • 1 adult; same locality; 9.VIII.2014; SEAG com.; MNHN • 1 adult; same locality; 21.VIII.2014; SEAG com.; coll. CGIR • 1 adult; same locality; 30.VIII.2014; SEAG com.; coll. CGIR • 1 ♀; same locality; 27.IX.2014; SEAG com.; coll. CGIR • 2 adults; same locality; 18.X.2014; SEAG com.; coll. CGIR; coll. DMAT • 1 ♂; same locality; 31.I.2015; SEAG com.; coll. CGIR • 1 adult; same local- ity; 18.IV.2015; SEAG com.; coll. CGIR • 1 adult; same locality; 25.IV.2015; SEAG com.; coll. CGIR .

DISTRIBUTION. — Previously only known from type specimen, collected in Venezuela.

REMARKS

This species is difficult to identify although the presence of an arolium and the large eyes were diagnostic for the genus Gerax . We have been able to compare our specimens with photographs of type specimens of Gerax fuscum Brindle, 1974 and Gerax lucidum Brindle, 1974 , also stored at MIZA. Both species were described on a single male specimen. According to our specimens, the differences stated in Brindle’s descriptions (1974) are scarce: concerning the colour of pronotum and wings, our specimens vary from pure yellow ( Gerax lucidum ) to yellow suffused with brown ( Gerax fuscum ); pending further investigations we refer all our specimens as Gerax fuscum . It is likely that the two species are to be synonymized in the future.

Figures

FIG. 7. — A, Eugerax poecilum Hebard, 1917; B, Gerax fuscum Brindle, 1974. Scale bars: 1.0 mm.