Agrilaxia (Agrilaxia) cordicollis, Bílý & Brûlé, 2013

Bílý, Svatopluk & Brûlé, Stéphane, 2013, A study on the genus Agrilaxia of French Guiana (Coleoptera: Buprestidae: Anthaxiini), Acta Entomologica Musei Nationalis Pragae 53 (2), pp. 657-686 : 672-673

publication ID	https://doi.org/ 10.5281/zenodo.5740762
publication LSID	lsid:zoobank.org:pub:9F7EF462-1756-4F5D-A7C2-9C6A8FCD81B1C
DOI	https://doi.org/10.5281/zenodo.5741178
persistent identifier	https://treatment.plazi.org/id/804287ED-126A-FFC0-FE8E-FDE0FE786EEC
treatment provided by	Marcus
scientific name	Agrilaxia (Agrilaxia) cordicollis
status	sp. nov.

Treatment

Agrilaxia (Agrilaxia) cordicollis sp. nov.

( Figs 6 View Figs 1–8 , 32 View Figs 30–39 )

Type locality. French Guiana, Montagne des Chevaux.

Type specimen. HOLOTYPE ( NMPC, J): “ Guyane Fr., Montagne des Chevaux , 30.vii.2006, Eclos // Ex. coll. P. H. Dalens, Coll. S. Brûlé, No GF 0205”.

Diagnosis. Medium-sized (6.5 mm), slightly prognathous, long, stout, narrowly wedgeshaped, matt ( Fig. 6 View Figs 1–8 ); dorsal surface black, clypeus bright green, pronotum with weak violet lustre, elytra with green lustre; ventral surface green-bronze, metacoxae and laterotergites dark golden-orange; legs black, antennae black with violet lustre; entire body asetose except for tibiae which bear inner (protibiae) or inner and outer (meso- and metatibiae) rows of stiff bristles.

Description of male holotype ( Fig. 6 View Figs 1–8 ). Head large, distinctly wider than anterior pronotal margin; clypeus trapezoidal, anterior margin straight; frons shallowly, widely depressed, narrowest part at anterior third; vertex finely grooved, 0.8 times as wide as width of eye; eyes large, suboval, distinctly projecting beyond outline of head, inner margins slightly Sshaped; sculpture of head almost homogeneous consisting of small, oval or polygonal cells with very small, almost indistinct central grains; antennae relatively short, reaching anterior third of pronotal margins when laid alongside; scape very long, slightly pyriform, somewhat curved, 4 times as long as wide; pedicel suboval, 1.5 times as long as wide; third antennomere small, subcylindrical, 1.3 times as long as wide; fourth antennomere triangular, as long as wide, antennomeres 5–10 trapezoidal, distinctly wider than long, terminal antennomere axe-shaped.

Pronotum rather strongly convex, 1.2 times as wide as long, with deep prescutellar pit and laterobasal depressions; anterior margin rather strongly biarcuate with large, wide medial lobe, posterior margin very slightly biarcuate; lateral margins slightly S-shaped, deeply emarginate in front of sharp posterior angles (pronotum more or less cordiform); maximum pronotal width at anterior fifth; posterior margin with two large tubercles on both sides of prescutellar pit; “agriloid carina” at posterior angles rather sharp, well defined, reaching posterior third of pronotal length; pronotal sculpture rather homogeneous consisting of small, rounded or polygonal cells without central grains. Scutellum relatively large, cordiform, twice as wide as long, microsculptured.

Elytra narrowly wedge-shaped, 2.9 times as long as wide, convex, somewhat depressed along suture, with two very weak, almost indistinct traces of longitudinal carinae; subhumeral carina well defined, reaching almost elytral midlength; humeral swellings well-developed, basal transverse depression deep, wide, reaching scutellum; elytral margins emarginate at anterior third then regularly tapering towards separately rounded apices; apices slightly caudiform, very finely, almost indistinctly serrate; elytral epipleura very narrow, parallelsided, reaching caudiform part of elytra; sculpture consisting of very fine punctures which are transversely fused, forming short, zig-zag rugae.

Ventral surface very lustrous, finely ocellate, anal ventrite roughly punctate, obtusely rounded, with fine, lateral serrations; anal tergite rounded, very sharply serrate. Legs moderately long, protibiae slightly curved, widened distally, bearing brush-like, inner row of dense, cream-white bristles; mesotibiae somewhat flattened, widened distally, with inner row of short, sparse bristles; metatibiae straight, slightly flattened with short, sparse bristles on inner margin and row of dense bristles on posterior half of outer margin; tarsi relatively short (all tarsi shorter than tibiae), tarsomeres 1–4 with adhesive pads. Tarsal claws short, hook-shaped, slightly enlarged at base.

Aedeagus ( Fig. 32 View Figs 30–39 ) widely spindle-shaped, flat; setiferous, apical part of parameres strikingly narrowed, long (almost one third of length of parameres); median lobe sharply pointed, without lateral serration.

Sexual dimorphism. Female unknown.

Measurements. Length: 6.5 mm; width: 1.6 mm.

Differential diagnosis. Agrilaxia cordicollis sp. nov. belongs to the A. bivittata species-group and it is similar (and probably related) to the following species, A. elegans sp. nov. ( Fig. 5 View Figs 1–8 ) and to A. claudei ( Fig. 3 View Figs 1–8 ). From both it strongly differs by its colouration (completely black body – Fig. 6 View Figs 1–8 ), almost cordiform pronotum, by the finer, homogeneous pronotal ocellation, more parallel elytra and from A. elegans sp. nov. also by the shape of the male genitalia ( Figs 31 View Figs 30–39 vs. 32).

Etymology. The specific epithet is an adjective derived from the Latin nouns cor (heart) and collum (neck) to stress the cordiform shape of the pronotum.

Distribution. French Guiana.