Cephennomicrus candalaganus, Jałoszyński, 2024

Jałoszyński, Paweł, 2024, Cephenniini of the Philippines. Part 6. First record of Cephennomicrus Reitter from Mindanao, with three new species (Coleoptera, Staphylinidae, Scydmaeninae), Zootaxa 5471 (4), pp. 465-472 : 468-469

Cephennomicrus candalaganus sp. n.

( Figs 3–4 , 11–14 , 19)

Type material. Holotype: PHILIPPINES ( Mindanao ): ♂, two labels: “PHILIPPINES: Mindanao Araibo / Pantukan, Compostela Valley / 900 m, Candalaga Mts. / 7°16’35.3’’N, 126°10’12.8’’E / 4.5.2019, A.V. Shavrin leg” [white, printed], “ CEPHENNOMICRUS / candalaganus m. / P. Jałoszyński, 2021 / HOLOTYPUS” [red, printed] ( MNHW).

Diagnosis. Body ( Fig. 3 ) large, BL ~ 1 mm, stout and strongly convex, with basic vestiture composed of extremely short, barely discernible and sparse setae, and with conspicuously numerous macrosetae ( Fig. 4 ) on elytra; dorsum impunctate; antennal club trimerous; pronotum with two pairs of distinct antebasal pits, lacking transverse impression; aedeagus ( Figs 11–14 ) in ventral view elongate subtriangular, broadest near base; endophallus with long flagellum and several paired sub-basal sclerites.

Description. Body of male ( Fig. 3 ) stout, strongly convex, uniformly dark brown; macrosetae slightly lighter than cuticle, basic vestiture of extremely short and sparse setae barely discernible; BL 1.05 mm.

Head broadest at large, moderately strongly convex and coarsely faceted eyes, HL 0.15 mm, HW 0.28 mm; vertex and frons evenly weakly convex; frontal glands not discernible. Punctures and setae on frons and vertex indiscernible under magnification 100 ×. Antennae slender, with distinct and large trimerous clubs (In Fig. 3 best visible in right antenna), AnL 0.50 mm; antennomeres 1–2 each elongate, 3–6 each about as long as broad, 7–9 each slightly elongate, 10 almost as long as broad, 11 slightly elongate.

Pronotum subtrapezoidal, broadest between middle and anterior third and at base; PL 0.33 mm, PW 0.43 mm; anterior margin strongly convex; lateral margins strongly rounded in anterior half, slightly concave in posterior third; posterior corners nearly right-angled and blunt; posterior margin distinctly bisinuate and with small median emargination in front of scutellar shield. Pronotal base with two pairs of small but deep and nearly circular pits, inner pair not connected by groove, distance between inner pits twice as wide as between inner and outer pit. Punctures on pronotum extremely fine, inconspicuous; three pairs of macrosetae present ( Fig. 4 ): one posterolateral near each hind angle, one posteromedian in front of scutellar shield, and one anterolateral on anterior widest site.

Elytra together oval, broadest distinctly in front of middle; EL 0.58 mm, EW 0.54 mm, EI 1.07; humeral calli distinct; subhumeral lines lacking; sides of elytra strongly rounded; elytral apices separately rounded. Punctures similar to those on pronotum, inconspicuous; numerous macrosetae ( Fig. 4 ) distributed unevenly on entire surface of each elytron.

Hind wings long and functional.

Legs moderately long and slender, unmodified.

Aedeagus ( Figs 11–14 ) elongate subtriangular; AeL 0.18 mm; median lobe in ventral view broadest in basal region, apex broadly rounded; diaphragm indiscernible; endophallus with long flagellum and with a few elongate paired lateral sclerites in sub-basal region, parameres slender and in lateral view curved, each with one moderately long apical seta.

Female. Unknown.

Distribution. Eastern Mindanao ( Fig. 19 ).

Etymology. Named after Candalaga Mountains.

Remarks. Among species known to occur in the Philippines, Cm. candalaganus has a similar body shape and a similar distribution of macrosetae to that of Cm. leyteanus (which has two more lateral pronotal pairs), but a clearly different aedeagus ( Fig. 19 ).

Figures

FIGURE 19. Distribution of nominal Cephennomicrus species within the Philippines, with aedeagus illustrated for each species.

FIGURES 1–6. Cephennomicrus apoensis sp. n. (1–2), Cm. candalaganus sp. n. (3–4), and Cm. talonoensis sp. n. (5–6). Dorsal habitus of holotype males (1, 3, 5); distribution of macrosetae (2, 4, 6).

FIGURES 7–18. Aedeagus in ventral (7, 9, 11, 13, 15, 17) and lateral (8, 10, 12, 14, 16, 18) views. Cephennomicrus apoensis sp. n. (7–10), Cm. candalaganus sp. n. (11–14), and Cm. talonoensis sp. n. (15–18).