Protoconnus bolivianus Franz

Jałoszyński, Paweł, 2018, Revision of the Neotropical genus Protoconnus Franz (Coleoptera: Staphylinidae: Scydmaeninae), Zootaxa 4392 (1), pp. 41-82 : 51-52

Protoconnus bolivianus Franz

( Figs 21 , 28–29 , 92 , 101 )

Protoconnus bolivianus Franz, 1980: 195 , fig. 178a, b.

Type material. Holotype: BOLIVIA (Manuel María Caballero Province): ♂, three labels ( Fig. 92 ): "Nebewald b. / Comarapa, Peru / lg.H.Franz" with "SA143" on the reverse side and "Peru" overwritten with "Boliv." [white, printed], " Protoconnus / bolivianus / m. / det.H.Franz" [white, handwritten and printed], "Typus" [red, handwritten] (NHMW).

Revised diagnosis. BL 0.94 mm; body relatively slender, elytra 1.64 times as broad as transverse pronotum; frons in male slightly impressed between supraantennal tubercles; vertex unmodified; pronotal base with distinct pits and groove; lateral pronotal carinae distinct in posterior third; humeral carinae rounded; aedeagus in ventral view very slender, nearly gradually narrowing from the broadest site of basal capsule to narrow and pointed apex, parameres in subapical region bent laterad at an obtuse angle.

Redescription. Body of male ( Fig. 21 ) strongly convex, brown, setae distinctly lighter than cuticle; BL 0.94 mm.

Head broadest at large, strongly convex and coarsely faceted eyes, HL 0.18 mm, HW 0.20 mm; tempora in lateral view as long as about half of the longest diameter of eye; vertex distinctly convex, posterior margin of vertex demarcated from the 'neck' region by a weakly elevated and rounded ridge laterally confluent with evenly rounded tempora; frons indistinctly impressed between prominent supraantennal tubercles. Punctures on frons and vertex inconspicuous; setae short, moderately dense and suberect. Antennae slender, AnL 0.43 mm, less than half as long as body, club distinctly delimited; antennomeres I and II each about twice as long as broad; III–X each transverse, XI slightly longer than X, about 1.1 × as long as broad.

Pronotum slightly transverse, subtrapezoidal, broadest at base; PL 0.23 mm, PW 0.28 mm. Anterior margin weakly convex, lateral margins weakly rounded; lateral carinae distinct in posterior third; transverse antebasal groove and pits distinct. Punctures on pronotal disc inconspicuous; setae sparse, short, suberect.

Elytra much more convex than pronotum, oval, broadest in front of middle; EL 0.54 mm, EW 0.45 mm, EI 1.19; humeral carinae indistinct, rounded. Punctures and setae similar to those on pronotum.

Legs moderately long and slender, unmodified.

Aedeagus ( Figs 28–29 ) very slender; AeL 0.25 mm; in ventral view basal capsule as long as 1/3 of distal region, gradually narrowed distad; distal region laterally confluent with sides of basal capsule, slender, subtriangular, with narrow, pointed apex, in lateral view its distal half distinctly recurved; in lateral view area above parameral bases forming a long subtriangular projection; parameres with apices bent laterad at an obtuse angle, each with one long apical and one short subapical seta.

Female unknown.

Distribution. Central Bolivia ( Fig. 101 ).

Remarks. The aedeagus of P. bolivianus is very similar to that of P. comarapae ; in both species the median lobe is extremely slender and pointed at apex, the diaphragm is well-demarcated, broadly U-shaped and located on the ventral wall, and the dorsal wall of median lobe forms a prominent projection, which is subrectangular in ventral view and subtriangular in lateral view. Differences in the aedeagal structures between these two sympatric species are small, although clear (the dorsal projections and parameres have different shapes). Externally, P. bolivianus differs from P. comarapae in distinctly larger eyes, and consequently shorter tempora, which are about half as long as the longest diameter of eye in lateral view (in P. comarapae , the tempora are distinctly longer than half diameter of eye).

In the original description, Franz (1980) gives additional collecting data for the type series, not included in the labels: 0 7.10.1968.

Figures

FIGURE 101. Distribution of nominal Protoconnus species.

FIGURES 18–23. Dorsal habitus of Protoconnus species. Protoconnus andicola Franz (18); P. venezolanus Franz, holotype (19) and paratype (20); P. bolivianus Franz (21); P. comarapae Franz (22); P. princeps (Franz) (23).

FIGURES 24–33. Aedeagi of Protoconnus species. Protoconnus andicola Franz (24–25); P. venezolanus Franz (26–27); P. bolivianus Franz (28–29); P. comarapae Franz (30–31); P. princeps (Franz) (32–33).

FIGURES 90–100. Original labels of primary type specimens of previously described Protoconnus species. Protoconnus andicola Franz (90); P. venezolanus Franz (91); P. bolivianus Franz (92); P. comarapae Franz (93); P. princeps (Franz) (94); P. araguanus Franz (95); P. paraguayanus Franz (96); P. peruensis Franz (97); P. robustus Franz (98); P. minutus Franz (99); P. minutissimus Franz (100).