Cephennula gemina, Jałoszyński, Paweł, 2011

Jałoszyński, Paweł, 2011, Ten new species of Cephennula Jałoszyński (Coleoptera, Staphylinidae, Scydmaeninae) from Malaysia, Zootaxa 3113, pp. 36-52 : 39-41

Cephennula gemina sp. n.

( Figs. 4 , 15, 16)

Holotype: E MALAYSIA: 3, two labels: " SABAH \ Mt. Kinabalu \ 1450-1550 m \ 23.V.1987 \ Burckhardt - Löbl" [white, printed]; " CEPHENNULA \ densepunctata m. \ det. P. Jałoszyński, 2011 \ HOLOTYPUS " [red, printed] ( MHNG). Paratypes (3 33, 13 ƤƤ): 1 3, 3 ƤƤ, same data as holotype; 1 3, 4 ƤƤ, same data except 1500 m and 21.V.1987; 1 3, 1 Ƥ, same data except 1500 m and 30.IV.1987; 3 ƤƤ, same data except 1430 m and 22.V.1987; 1 Ƥ, " SABAH: E Mt.Kinabalu \ 1150m,rte Ranau-Kota \ Kinabalu, 24.V.1987 \ Burckhardt - Löbl" [white, printed]; 1 Ƥ, "BORNEO SABAH Mt. \ Kinabalu Nat.Pk. \ HQ Liwagu River \ 1490m 18. V. 1987 \ A. Smetana" ( MHNG, PCPJ).

Diagnosis. Body reaching or nearly reaching 1 mm in length; antennal club strongly flattened and compact; punctures on head unevenly distributed, those on sides of vertex, on frons and clypeus separated by spaces 0.5– 2 x as wide as puncture diameter, vertex with impunctate median area; median part of pronotum with dense punctures; sublateral pronotal carinae as long as pronotum; subhumeral carinae about as long as 1/ 3x EL and distinctly longer than humeral carinae; aedeagus in ventral view drop-shaped, with triangular and pointed apex of median lobe; endophallus with four pairs of elongate sclerites, of which three pairs are curved laterally and one nearly straight.

Description. Body of male ( Fig. 4 ) externally nearly identical as C. densepunctata , only differences are described below. BL 0.98–1.00 mm (mean 0.98 mm).

Head unevenly covered with moderately large and deep, sharply marked punctures, on sides of vertex, on frons and clypeus separated by spaces 0.5– 2 x as wide as puncture diameter, vertex in middle impunctate; HL 0.11–0.13 mm (mean 0.12 mm), HW 0.21–0.24 mm (mean 0.22 mm). AnL 0.35–0.38 mm (mean 0.36 mm).

Median part of pronotum covered with punctures similar to those on head and becoming gradually larger and denser towards sides, those on median part of disc separated by spaces approximately equal to puncture diameter or slightly wider, punctures between sublateral carinae and lateral margins of pronotum distinctly larger and denser than those in middle, nearly adjacent to each other; PL 0.30–0.31 mm (mean 0.30 mm), PW 0.43–0.45 mm (mean 0.43 mm).

Elytra covered with fine and sparse punctures, EL 0.55–0.58 mm (mean 0.56 mm), EW 0.48–0.50 mm (mean 0.49 mm), EI 1.13–1.18 (mean 1.15); subhumeral carinae about as long as 1/ 3x EL; humeral carinae less distinct and much shorter.

Aedeagus (Figs. 15, 16) in ventral view drop-shaped with narrow, subtriangular and pointed apex; AeL 0.23 mm. Endophallus darkly sclerotized, with four pairs of elongate sclerites—three pairs strongly curved laterally and one median pair nearly straight and directed towards apex of aedeagus; parameres slender, not exceeding apex of median lobe, each bearing two apical setae.

Female. Externally indistinguishable from males. BL 1.00– 1.01 mm (mean 1.01 mm); HL 0.11–0.13 mm (mean 0.12 mm), HW 0.23–0.24 mm (mean 0.24 mm), AnL 0.34–0.38 mm (mean 0.35 mm); PL 0.31–0.33 mm (mean 0.32 mm), PW 0.45–0.48 mm (mean 0.46 mm); EL 0.56–0.58 mm (mean 0.57 mm), EW 0.50 mm, EI 1.13– 1.15 (mean 1.15).

Distribution. East Malaysia (Borneo: Sabah).

Etymology. The name is derived from Latin soror gemina (a twin sister) and refers to the high similarity of this species to C. densepunctata .

Remarks. This species is externally nearly identical to C. densepunctata . In addition to the clearly different aedeagus C. gemina can be distinguished also by distinctly smaller and sparser punctures on the head and pronotum.

Figures

FIGURES 3 – 7. Habitus of males. 3 ― Cephennula densepunctata sp. n.; 4 ― Cephennula gemina sp. n.; 5 ― Cephennula minutissima sp. n.; 6 ― Cephennula penrissenana sp. n.; 7 ― Cephennula poringana sp. n. Scale bars: 0.2 mm.