Protoconnus volcanbaru, Jałoszyński, 2018

Jałoszyński, Paweł, 2018, Revision of the Neotropical genus Protoconnus Franz (Coleoptera: Staphylinidae: Scydmaeninae), Zootaxa 4392 (1), pp. 41-82: 77-78

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Protoconnus volcanbaru

sp. n.

Protoconnus volcanbaru   sp. n.

( Figs 14–17 View FIGURES 14–17 , 84 View FIGURES 84–85 , 86–87 View FIGURES 86–89 , 101 View FIGURE 101 )

Type material. Holotype: PANAMA (Chiriquí Province): ♂, two labels: " PANAMA, Chiriqui Prov. / Volcan Baru, 2300-2500 m / 8.848°N, 82.526°W / 0 1.05.2014, litter layer / leg. Tim Struyve" [white, printed], " PROTOCONNUS   / volcanbaru   m. / P. JAŁOSZYŃSKI, 2018 / HOLOTYPUS " [red, printed] ( MNHW).

Diagnosis. BL 1.45 mm; body slender, elytra 1.80 times as broad as pronotum, which is as long as broad; frons in male between supraantennal tubercles flat; vertex unmodified, flattened at middle and with straight posterior margin; pronotal base with distinct transverse groove and five pits; lateral pronotal carinae distinct in posterior half; humeral carinae indistinct, rounded; aedeagus in ventral view with basal capsule oval, distal region broader than basal capsule, strongly broadened near middle, apical margin slightly emarginate.

Description. Body of male ( Fig. 84 View FIGURES 84–85 ) strongly convex, brown, covered with setae distinctly lighter than cuticle; BL 1.45 mm.

Head ( Fig. 14 View FIGURES 14–17 ) broadest at extremely large, strongly convex and coarsely faceted eyes, HL 0.23 mm, HW 0.35 mm; tempora absent; vertex convex but at middle slightly flattened, with its posterior margin straight; frons flat and moderately broad between small supraantennal tubercles. Punctures on frons and vertex inconspicuous; setae relatively long, dense and suberect. Antennae conspicuously long and slender, AnL 0.80 mm, distinctly longer than half BL, club indistinctly delimited; antennomere I three times as long as broad, II about twice as long as broad, III –X each slightly to strongly elongate, XI slightly longer than X, about 1.7 × as long as broad.

Pronotum ( Fig. 14 View FIGURES 14–17 ) as long as broad, subtrapezoidal, broadest at base; PL 0.38 mm, PW 0.38 mm. Anterior margin nearly straight, lateral margins weakly rounded in anterior third, slightly sinuate in posterior half, so that posterior corners are slightly projecting posterolaterad, posterior margin distinctly bisinuate; lateral carinae distinct in posterior half; transverse antebasal groove and five antebasal pits distinct. Punctures on pronotal disc inconspicuous; setae dense, long, suberect.

Elytra much more convex than pronotum, oval, broadest at middle; EL 0.85 mm, EW 0.68 mm, EI 1.26; humeral carinae indistinct, rounded. Punctures and setae similar to those on pronotum.

Legs moderately long and slender, unmodified.

Aedeagus ( Figs 86–87 View FIGURES 86–89 ) stout; AeL 0.25 mm; in ventral view basal capsule slightly shorter than distal region, oval; distal region laterally delimited from sides of basal capsule by constriction, strongly broadened near middle, much broader than basal capsule, with apical margin slightly concave at middle, in lateral view distal half slightly bent dorsad; in lateral view area above parameral bases forming a short subtriangular projection; parameres slightly divergent distad, each with one short apical and one long subapical seta.

Female unknown.

Distribution. Western Panama ( Fig. 101 View FIGURE 101 ).

Etymology. Locotypical, after Volcán Barú, the highest mountain of Panama (noun in apposition). Remarks. This species can be easily identified on the basis of its unusual body shape and long, slender antennae with indistinctly delimited club; its aedeagus is similar to that of P. inexpectatus   , but externally these species are strikingly different (cf. Figs 84, 85 View FIGURES 84–85 ).