Cephennodes (Cephennodes) cordilaminatus, Jałoszyński, 2017

Jałoszyński, Paweł, 2017, Ant-like stone beetles on the roof of the world. Cephenniini of Nepal and Bhutan (Coleoptera, Staphylinidae, Scydmaeninae), Zootaxa 4349 (1), pp. 1-120 : 73-74

Cephennodes (Cephennodes) cordilaminatus sp. n.

( Figs 160 , 211–214 , 229 )

Type material. Holotype: NEPAL (Parbat District): ♂, one label: " NEPAL Parbat / Distr. Ghoropani / Pass N slope / 2700m 6.X.1983 / Smetana & Löbl" [white, printed] ( MHNG).

Diagnosis. BL 1.30 mm; abdominal sternite II with posterior microserrate marginal carina which has straight posterior margin, sternite III with very broad and long basal lamina with bisinuate posterior margin strongly expanded posteriorly at middle, where it forms a subtriangular rounded lobe, from under which arises a massive projection on a short 'stalk', projection in ventral view inversely heart-shaped, with strongly concave posterior margin, its ventral surface covered with tiny denticles; apex of median lobe of aedeagus subtriangular, blunt; apical projection of aedeagus distant from apex of median lobe, with distal margin strongly recurved and strongly oblique in relation to the long axis of aedeagus, apical portion of apical projection narrowly subtriangular and rounded.

Description. Body of male ( Fig. 160 ) dark brown, moderately stout, with shallow constriction between pronotum and elytra, strongly convex, covered with light brown setae; BL 1.30 mm.

Head subtrapezoidal, HL 0.20 mm, HW 0.35 mm; vertex and frons confluent and weakly, evenly convex, vertex with a pair of tiny but distinct tubercles; supraantennal tubercles small, weakly elevated; eyes moderately large, strongly convex, coarsely faceted. Punctures on vertex and frons small and shallow but distinct, moderately sharply marked, nearly evenly and densely distributed, separated by spaces slightly shorter than diameters of punctures; setae sparse, short, suberect. Antennae moderately long and moderately thickened, AnL 0.68 mm, pentamerous club indistinctly delimited; antennomere I about 1.2 × as long as broad; II narrower but slightly longer than I, 1.5 × as long as broad; III slightly narrower and much shorter than II, about as long as broad, IV–VI each as broad as III and indistinctly longer, about 1.1 × as long as broad; VII slightly broader and indistinctly longer than VI, about 1.1 × as long as broad; VIII distinctly broader than VII but comparable in length, about as long as broad; IX and X each distinctly larger than preceding ones, each about as long as broad; XI distinctly broader than X, slightly shorter than IX–X together, about 1.6 × as long as broad.

Pronotum in dorsal view subtrapezoidal, broadest near anterior third, PL 0.38 mm, PW 0.60 mm; anterior margin in strictly dorsal view arcuate; lateral margins indistinctly microserrate, strongly rounded in anterior half, weakly so in posterior third and weakly but distinctly convergent toward nearly right-angled hind corners; posterior margin shallowly bisinuate; lateral carinae distinct but narrow, fused with lateral margins; antebasal pits small and shallow, each much closer to posterior than to lateral pronotal margin. Punctures on disc fine and inconspicuous; setae moderately long, dense, suberect.

Elytra elongate, oval, broadest near middle, EL 0.73 mm, EW 0.68 mm, EI 1.07. Humeral calli weakly elevated; subhumeral lines distinct, divergent posteriorly, equal to about 0.3 EL, each developed as moderately sharp stepwise border between more convex humeral region and less convex adsutural area; basal pit on each elytron connected to shallow and diffuse arcuate impression extending posteromesally; apices of elytra separately rounded. Punctures slightly more distinct than those on pronotum but superficial and inconspicuous; setae similar to those on pronotum.

Hind wings not studied.

Metaventrite with moderately large, sharply delimited postmesocoxal impressions, with median area covered with fine, dense punctures.

Abdomen ( Figs 211–212 ) strongly modified; abdominal sternite II with posterior microserrate marginal carina which has straight posterior margin, sternite III with very broad and long basal lamina with bisinuate posterior margin strongly expanded posteriorly at middle, where it forms a subtriangular rounded lobe, from under which arises massive projection on a short 'stalk', projection in ventral view inversely heart-shaped, with strongly concave posterior margin, its ventral surface covered with tiny denticles.

Legs unmodified.

Aedeagus ( Figs 213–214 ) slender, AeL 0.18 mm, apex of median lobe subtriangular and blunt; apical projection distant from apex of median lobe, its distal margin strongly recurved and so strongly oblique in relation to the long axis of aedeagus that it becomes lateral margin; apex of apical projection narrowly subtriangular and rounded; parameres very slender, slightly unequal in length, one reaching and one slightly exceeding apex of median lobe, each with one subapical seta.

Female. Unknown.

Distribution ( Fig. 229 ). Central Nepal.

Etymology. The name cordilaminatus refers to the heart-shaped projection or lamina on the abdomen (after Latin cor, the heart).

Remarks. This Cephennodes is most similar to C. ghorepanianus ; differences are discussed in remarks for the latter species.

Figures

FIGURES 156 – 162. Dorsal habitus of Cephennodes (s. str.) paralalitpuranus sp. n. (156), C. (s. str.) bahrabisensis sp. n. (157), C. (s. str.) bilaminatus sp. n. (158), C. (s. str.) ghorepanianus sp. n. (159), C. (s. str.) cordilaminatus sp. n. (160), C. (s. str.) mangmayanus sp. n. (161), and C. (s. str.) bilobatus sp. n. (162).

FIGURES 211 – 222. Abdomen of male in right lateral (211, 215, 219) and ventral (212, 216, 220) views and aedeagus in ventral (213, 217, 221) and lateral (214, 218, 222) views. Cephennodes (s. str.) cordilaminatus sp. n. (211 – 214), C. (s. str.) mangmayanus sp. n. (215 – 218), and C. (s. str.) bilobatus sp. n. (219 – 222).

FIGURES 229 – 230. Distribution of Cephennodes (s. str.) cordilaminatus sp. n. (229, circle), C. (s. str.) mangmayanus sp. n. (229, triangle), C. (s. str.) bilobatus sp. n. (230, circle).