Cephennomicrus santubongensis, Jałoszyński, Paweł, 2015

Jałoszyński, Paweł, 2015, Four new species of Cephennomicrus Reitter (Coleoptera, Staphylinidae, Scydmaeninae) from Malaysia, Zootaxa 3911 (2), pp. 273-279 : 276-278

Cephennomicrus santubongensis sp. n.

( Figs. 3 , 7 , 13–14 )

Type material. Holotype: EAST MALAYSIA (Borneo: Sarawak): ♂, two labels: " MALAYSIA: Sarawak, San- / tubong, 20 km N Kuching / Camp Permai, 10 m, 5.-10. / VIII.2003, leg. A. Schulz" [white, printed]; " Cephennomicrus / santubongensis m. / det. P. Jałoszyński, '14 / HOLOTYPUS " [red, printed] ( SMNS).

Diagnosis. BL about 1 mm; pronotum with two pairs of small antebasal pits; each elytron with two macrosetae; aedeagus in ventral view strongly elongate, with sharply delimited apical part longer than bulbous basal part and composed of dorsal and ventral plates of equal length.

Description. BL 1.06 mm. Body of male ( Figs. 3 , 7 ) elongate and strongly convex, brown with slightly lighter macrosetae.

Head broadest at large, strongly convex and coarsely faceted eyes; HL 0.15 mm, HW 0.28 mm; vertex and frons confluent and convex; supraantennal tubercles feebly marked. Punctures on head dorsum shallow and distinct, slightly irregular in shape and unevenly distributed, separated by spaces 1–1.5x as wide as diameters of punctures; setae indiscernible under magnification 80x. Antennae slender and with club composed of enlarged antennomeres X–XI, AnL 0.50 mm, antennomeres I–II and IX elongate; III–VIII about as broad as long; X transverse; XI much longer than X and about 1.3x as long as broad; antennomeres IX–XI with sparse strongly erect and long setae among short and suberect basic setation.

Pronotum ( Fig. 7 ) approximately subrectangular with convex anterior margin, broadest anterior to middle but indistinctly narrowing posteriorly; PL 0.33 mm, PW 0.43 mm; anterior and lateral margins in anterior half broadly rounded, lateral margins in posterior half nearly straight; anterior corners visible only in anterodorsal view, distinct and sharp-angled but with rounded apices; posterior margin nearly straight with indistinct flattening in front of mesoscutellum; posterior corners slightly obtuse; pronotal base with two lateral pairs of small distinct pits. Punctures on pronotal disc smaller than those on frons and vertex but distinct, separated by spaces subequal to diameters of punctures; pronotal disc only with macrosetae: two lateral pairs and one posterior pair in front of mesoscutellum.

Elytra ( Fig. 7 ) oval, broadest anterior to middle; EL 0.59 mm, EW 0.50 mm, EI 1.18; humeral calli wellmarked, elongate. Punctures on elytra barely discernible under magnification 80x; each elytron only with two lateral macrosetae. Hind wings well developed.

Legs moderately long and slender, unmodified.

Aedeagus ( Figs. 13–14 ) in ventral view strongly elongate; AeL 0.30 mm; median lobe with sharply demarcated and very long apical part, apex subtrapezoidal and slightly concave; in lateral view apical projections composed of long ventral and dorsal plates; internal armature complicated and symmetrical, with a pair of very long and slender lateral rod-like projections curved mesally; parameres broad and not reaching apex of median lobe, each with two apical setae.

Female. Unknown.

Distribution. East Malaysia, Sarawak.

Etymology. Locotypical, after Mount Santubong.

Remarks. The aedeagus of this otherwise unremarkable species is very unusual and not similar to the genitalia of any other Cephennomicrus . Strongly elongated aedeagi can also be found in the Cephennomicrus taiwanensis species group, but in that distinct Taiwanese lineage the apical projections are very short and the endophallus contains a distinct, strongly asymmetrical and usually looped flagellum ( Jałoszyński 2009). Another species with a strongly elongated median lobe is C. lasios Jałoszyński from the Philippines, but in that species the apical projections are short, and a long and looped flagellum can be seen inside the median lobe ( Jałoszyński 2010b).

Figures

FIGURES 1 – 4. Dorsal habitus of holotype males. 1 ― Cephennomicrus curvidens sp. n.; 2 ― Cephennomicrus gentingensis sp. n.; 3 ― Cephennomicrus santubongensis sp. n.; 4 ― Cephennomicrus muluensis sp. n.

FIGURES 5 – 8. Body outline and distribution of macrosetae. 5 ― Cephennomicrus curvidens sp. n.; 6 ― Cephennomicrus gentingensis sp. n.; 7 ― Cephennomicrus santubongensis sp. n.; 8 ― Cephennomicrus muluensis sp. n.

FIGURES 9 – 16. Aedeagi of holotype males in ventral (9, 11, 13, 15) and lateral (10, 12, 14, 16) views. 9 – 10 ― Cephennomicrus curvidens sp. n.; 11 – 12 ― Cephennomicrus gentingensis sp. n.; 13 – 14 ― Cephennomicrus santubongensis sp. n.; 15 – 16 ― Cephennomicrus muluensis sp. n.