Chevrolatia iberica, Jałoszyński, 2019

Jałoszyński, Paweł, 2019, A new Iberian species of Chevrolatia Jacquelin du Val (Coleoptera, Staphylinidae, Scydmaeninae), Zootaxa 4691 (2), pp. 177-180 : 178-179

Chevrolatia iberica sp. n.

( Figs 1–8 )

Type material. Holotype: Spain: ♂, two labels: "Prov. Alicante / Puerto de Tudons / 19 V 66 1100 m. / Cl. Beuchet " [white, printed and handwritten]; " CHEVROLATIA / iberica m. / det. P. Jałoszyński, 2019 / HOLOTYPUS" [red, printed] ( MHNG).

Diagnosis. Elongate median area of vertex and frons strongly elevated, at middle about as broad as eye; pronotal base with arcuate, anteriorly convex transverse groove interrupted at middle by longitudinal carina; male protrochanters unmodified; aedeagus with a pair of strikingly tiny apical projections, in lateral view median lobe strongly bent in sub-basal region; endophallus with vesicular structure confined to distal half of median lobe; parameres with short setae scattered evenly along posterior margin.

Description. Body of male ( Fig. 1 ) strongly elongate and slender, distinctly flattened, moderately dark brown with indistinctly lighter appendages; setae yellowish; BL 1.98 mm.

Head ( Fig. 2 ) elongate, broadest at large, strongly convex and finely faceted eyes, HL 0.33 mm, HW 0.28 mm; vertex and frons confluent, their median area strongly elevated, at middle about as wide as eye, narrowest posteriorly and broadening anterad, at anterior margin about twice as broad as at base; sides of head flattened. Punctures on frons and vertex fine, inconspicuous, cuticle glossy; setae moderately long and dense, suberect; postocular tufts of setae dense and long; vertexal pits obscured by dense setae on lateral surface of median elevation. Antennae slender, nearly half as long as body, weakly thickened; AnL 0.95 mm, antennomere I about three times as long as broad and indistinctly broadened distad, II weakly elongate, III about as long as broad, IV and V each weakly elongate, VI–IX each about as long as broad, X indistinctly transverse, XI slightly shorter than IX–X combined, about 1.8 × as long as broad.

Pronotum ( Fig. 2 ) bell-shaped, broadest near anterior third; PL 0.43 mm, PW 0.34 mm. Anterior margin nearly straight; sides weakly rounded near anterior third and shallowly concave in posterior third; posterior margin shal- lowly bisinuate; lateral carinae sharply marked from base up to anterior fourth of PL, each accompanied in posterior half by narrow elongate mesal impression; pronotal base with transverse arcuate, anteriorly convex groove inter- rupted at middle by median longitudinal carina extending from base to nearly middle of pronotum, but distinct only shortly in front of posterior margin, laterally transverse groove not reaching lateral pronotal carinae. Punctures on pronotal disc fine and inconspicuous, cuticle glossy; setae moderately long, sparse and suberect.

Elytra together oval, broadest distinctly in front of middle, evenly convex; EL 1.05 mm, EW 0.61 mm, EI 1.71; humeral calli distinct but small; narrow adsutural area on each elytron strongly and abruptly raised at elytral base, narrowing and becoming gradually less elevated toward apices; elytral apices separately, broadly rounded. Punc- tures on elytra slightly more distinct than those on pronotum but fine and inconspicuous; setae indistinctly thicker than those on pronotum, moderately dense and suberect. Hind wings short and narrow, not functional.

Pygidium slightly broader than long; length 0.18 mm.

Legs ( Fig. 1 ) long and slender; protrochanter ( Fig. 3 ) unmodified; protibia ( Fig. 4 ) with distinct apical projec- tion on mesal margin.

Aedeagus ( Figs 5–8 ) relatively stout, AeL 0.29 mm; median lobe in ventral view with shallow constriction in submedian region, in lateral view strongly curved near base, apical projections conspicuously small, parameres with numerous setae of subequal length and nearly evenly distributed along posterior margin, parameral apices asetose.

Female. Unknown.

Distribution. SE Spain.

Etymology. After the Iberian Peninsula.

Remarks. Nine species of Chevrolatia were previously known to occur in the Palaearctic region; males of sev- en of them have conspicuously modified protrochanters, which are prolonged by a distoventral projection of various shapes (illustrated by Orousset (2008)). Males of only three Palaearctic species have unmodified protrochanters: C. hispanica Franz, 1970 , C. sylvanica Hernando & Castro, 2015 , and the newly described C. iberica , all recorded from southern Spain. Chevrolatia sylvanica is most conspicuous and easily distinguishable by its unusually stout aedeagus with broad parameres, each bearing a large tuft of long and dense setae in its subapical region (illustrated by Hernando & Castro (2015)). All remaining Palaearctic species of Chevrolatia have the parameral setae short and more or less evenly and sparsely distributed. Chevrolatia hispanica and C. iberica clearly differ in the shape of the median lobe (in ventral view gradually narrowing toward apex and with straight lateral margins in C. hispanica vs. broadly and shallowly constricted, with sinuate lateral margins in C. iberica ; in lateral view not curved in sub-basal region in C. hispanica vs. strongly curved in C. iberica ), the apical projections (as long as about 1/5 of median lobe in C. hispanica vs. conspicuously short, about as long as 1/9 of the median lobe in C. iberica ), and the capsular component of the endophallus (together with flagellum nearly as long as, or only slightly shorter than median lobe in C. hispanica vs. slightly shorter than half length of median lobe in C. iberica ).

Figures

FIGURES 1–4. Chevrolatia ibericasp. n., holotype male.Dorsal habitus (1); head andpronotum indorsal view (2); protrochanter (3); apex of protibia and protarsus (4).

FIGURES 5–8. Chevrolatia iberica sp. n., holotype male. Aedeagus in ventral (5, 7) and lateral (6, 8) views.