Gyrophaena gigaedeagica, Pace, 2014

Pace, R., 2014, Aleocharinae from Sabah (Borneo) collected by Guillaume de Rougemont (Coleoptera, Staphylinidae), Linzer biologische Beiträge 46 (1), pp. 727-794 : 730-731

Gyrophaena gigaedeagica nov.sp. ( Figs 2 and 69-72 )

T y p e m a t e r i a l Holotype, Sabah, Danum Valley , B.R.L., f.i.t., 14-16.II.2007, G. de Rougemont leg. ( CROU).

D e s c r i p t i o n: Length 1.6 mm. Body shiny, brown, antennae brown with the two basal antennomeres and base of the third pale yellows, legs dirty yellow. Second antennomere shorter than the first, third shorter than the second, fourth transverse, antennomeres five to ten as long as wide. Eyes longer than the postocular region in dorsal view. Body devoid of reticulation, that of the abdomen very transverse. Puncturation of the head evident, sparse and broadly absent on the longitudinal median band, that of the pronotum sparse and strong, distributed as in figure 71. Granulation of the elytra superfi- cial and sparse, that of the abdomen evanescent but salient near the posterior margin of all free tergites, male fifth free tergote without secondary sexual characters. Aedeagus: Figs 69-70 ; pronotum; Fig. 71 ; male sixth free tergite: Fig. 72.

C o m p a r a t i v e n o t e s: In the shape of the aedeagus and of the male sixth free abdominal tergite the new species is similar to G. immatura KRAATZ, 1859 from Sri Lanka, of which I have examined 1 male and 1 female of the type series labelled " Ceylon, J. Nietner, Gyrophaena immatura Kr. " (DEI). In the new species the dorsal and preapical portion of the aedeagus, in lateral view, are devoid a great curved lobe, and the internal sclerotised pieces of the aedeagus are devoid of a curved flagellum. The posterior angles of the male sixth free abdominal tergites are short in the new species, Fig. 72 , but of average length in G. immatura .

E t y m o l o g y: The enormous size of the aedeagus, which occupies more than half the length of the abdomen, suggested the name of the new species; it means "holder of gigantic aedeagus".

Figures

Figs 1-12: Habitus. (1): Gyrophaena manus nov.sp., scale bar 2 mm; (2): Gyrophaena gigaedeagica nov.sp., scale bar 1.6 mm; (3): Gyrophaena osferox nov.sp., scale bar 1.1 mm; (4): Brachida danumensis nov.sp., scale bar 1.8 mm; (5): Aisthentusa flagellifera nov.sp., scale bar 1 mm; (6): Psephothetemusa rougemonti nov.sp., scale bar 1.6 mm; (7): Pseudatheta rougemonti nov.sp., scale bar 1.6 mm; (8): Demerinda sabahensis nov.sp., scale bar 2.5 mm; (9): Outachyusa borneensis nov.sp., scale bar 2.4 mm; (10): Atheta (Acrotona) nitidaespinae nov.sp., scale bar 2.2 mm; (11): Atheta (Poromicrodota) borneotibialis nov.sp., scale bar 2.4 mm; (12): Pelioptera danumensis nov.sp., scale bar 2.5 mm.

Figs 65-76: Aedeagus in lateral and ventral view, spermatheca, sixth free urotergum of male, and pronotum. (65-68): Gyrophaena manus nov.sp.; (69-72): Gyrophaena gigaedeagica nov.sp.; (73- 76): Gyrophaena osferox nov.sp. Scale bars: 0.1 mm.