Agrilaxia (Agrilaxia) guianensis, 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 : 677-678

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.5741184
persistent identifier	https://treatment.plazi.org/id/804287ED-1271-FFC5-FE6E-FF00FE016C24
treatment provided by	Marcus
scientific name	Agrilaxia (Agrilaxia) guianensis
status	sp. nov.

Treatment

Agrilaxia (Agrilaxia) guianensis sp. nov.

( Figs 13 View Figs 9–16 , 37 View Figs 30–39 )

Type locality. French Guiana, Antecume – Pata.

Type specimens. HOLOTYPE ( NMPC, J): “ Guyane Fr., 30.ii.2011, Antecume-Pata, ex larva, P.-H. Dalens leg.”.

Diagnosis. Medium-sized (5.7 mm), distinctly prognathous, subcylindrical, dark, matt with silky lustre ( Fig. 13 View Figs 9–16 ); dorsal surface black, head, pronotum and scutellum with violet lustre, elytra with green lustre; clypeus golden green, antennae and legs black, antennae and anterior legs with green lustre; ventral surface bronze, prosternum, metasternum and basal two ventrites with green lustre; entire body asetose.

Description of male holotype ( Fig. 13 View Figs 9–16 ). Head rather large, somewhat wider than anterior pronotal margin; clypeus trapezoidal, anterior margin straight; frons deeply, widely grooved, vertex slightly convex, 1.4 times as wide as width of eye; eyes large, elliptical, somewhat projecting beyond outline of head, inner margins strongly S-shaped; antennae short, reaching midlength of lateral pronotal margins when laid alongside; scape slightly claviform, flattened, slightly curved, 4 times as long as wide; pedicel ovoid, twice as long as wide; third antennomere very slightly triangular, 2.2 times as long as wide; antennomeres 4–10 triangular to trapezoidal, as long as wide; terminal antennomere rhomboid, 1.5 times longer than wide; sculpture of head consisting of small, polygonal cells with small, indistinct central grains, clypeus simply punctured.

Pronotum convex, 1.2 times as wide as long, with wide, rather deep lateroposterior depressions and shallow prescutellar pit; anterior margin deeply biarcuate with large medial lobe, posterior margin slightly biarcuate; lateral margins straight, emarginate in front of rectangular posterior angles; maximum width at anterior fifth; “agriloid” carinae short, only slightly developed, basal tubercles on both sides of prescutellar pit small; sculpture homogeneous, consisting of small, polygonal cells with fine central grains. Scutellum small, subcordiform, flat, microsculptured, about twice as wide as long.

Elytra convex, slightly depressed along suture, distinctly caudiform, 3.3 times as long as wide, without traces of longitudinal carinae; humeral swellings small, basal, transverse depression wide, deep, reaching scutellum; subhumeral carina weak, short, reaching posterior margin of metacoxae; elytral epipleura very narrow, parallel-sided, reaching caudiform part of elytra; lateral margins widely, shallowly emarginate at midlength, than regularly tapering towards caudiform, finely serrate, separately rounded apices; elytral sculpture fine, rather homogeneous, consisting of fine punctures and transverse rugae.

Ventral surface lustrous, finely ocellate with tiny central grains, 4 terminal ventrites almost glabrous; anal ventrite regularly rounded, finely serrate, anal tergite flat, rounded, with very fine apical serrations; prosternum flat to slightly convex, with short, rather deep, transverse depression at midwidth of anterior margin. Legs slender, moderately long, protibiae only very slightly curved with rather dense row of inner, preapical, pale bristles; meso- and metatibiae straight, slender, unmodified; all tarsi shorter than tibiae, with ventral, adhesive pads. Tarsal claws hook-shaped with rather strongly widened base.

Aedeagus ( Fig. 37 View Figs 30–39 ) very long, slender, slightly bent dorsoventrally, parameres finely emarginate in front of setiferous area, median lobe obtusely pointed apically.

Sexual dimorphism. Female unknown.

Measurements. Length: 5.7 mm; width: 1.2 mm.

Differential diagnosis. Agrilaxia guianensis sp. nov. belongs to the A. aeruginosa speciesgroup (see above). It somewhat resembles dark species of the group but it differs from them by the straight, almost subparallel pronotal margins, very slightly defined “agriloid” and subhumeral carinae, more caudiform elytra, very finely serrate anal tergite and by the very long aedeagus.

Etymology. The species is named after the country of the origin ( Guiana); adjective.

Distribution. French Guiana.