Agrilaxia (Agrilaxia) prolonga, 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 : 679-680

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.5741186
persistent identifier	https://treatment.plazi.org/id/804287ED-1273-FFC7-FE5D-FF00FE026E6C
treatment provided by	Marcus
scientific name	Agrilaxia (Agrilaxia) prolonga
status	sp. nov.

Treatment

Agrilaxia (Agrilaxia) prolonga sp. nov.

( Figs 12 View Figs 9–16 , 36 View Figs 30–39 )

Type locality. French Guiana, Montagne de Kaw, Régina.

Type specimens. HOLOTYPE ( NMPC, J): “ Guyane ( Régina ), Montagne de Kaw, PK 32+2.5, 1.viii.2003 // piège lumineux, G. Moragues leg” . ALLOTYPE ( NMPC, ♀): “ Guyane ( Régina ), Montagne de Kaw, PK 36, 22.vii.1998, G. Moragues leg.// piège lumineux” . PARATYPES: “ Guyane Fr., Montagne des Singes , ex larva, viii.2008, Touroult” (1 J, NMPC) ; “ Guyane Fr., 6.viii.2011, Savane Matiti, Comm. de Macouria , PIV, J.-L. Giuglaris leg.” (1 ♀, NMPC) .

Diagnosis. Large (6.7–6.9 mm), moderately prognathous, very elongate, tapering posteriorly, matt with silky lustre, rather convex ( Fig. 12 View Figs 9–16 ); dorsal surface olive-green, elytra with violet tinge; pronotum with two large, black-violet stripes reaching both anterior and posterior margin, narrow space between them and lateral margins golden green; clypeus golden green, frons golden green with longitudinal, medial, black spot in male or clypeus golden-orange and frons black with narrow, green or blue-green stripe along eyes in female; vertex black and scutellum golden green in both sexes; ventral surface very lustrous, tricoloured: prosternum dark golden green, metasternum, metepimeres, posterior coxae and laterosternites 2–5 bright golden-orange, laterosternite 1 blue-green or violet, ventrites golden-bronze; antennae and legs golden green, meso- and metafemora golden-orange; entire body asetose.

Description of male holotype ( Fig. 12 View Figs 9–16 ). Head large, distinctly wider than anterior pronotal margin; clypeus trapezoidal, anterior margin very slightly emarginate; frons deeply grooved medially, narrowest part at anterior third; vertex slightly grooved, 1.2 times as wide as width of eye; eyes large, elliptical, slightly projecting beyond outline of head; antennae short, scarcely reaching midlength of lateral pronotal margins when laid alongside; scape slightly claviform, very slightly curved, 4 times longer than wide; pedicel shortly ovoid, 1.4 times as long as wide; third antennomere slightly triangular, 1.5 times as long as wide; antennomeres 4–10 trapezoidal, slightly wider than long, terminal antennomere rhomboid, almost twice as long as wide; sculpture of head consisting of rounded or slightly polygonal cells with indistinct central grains.

Pronotum convex, slightly cordiform, 1.2 times as wide as long; anterior margin deeply biarcuate, posterior margin slightly biarcuate; lateral margins S-shaped, regularly rounded at anterior two thirds, deeply emarginate in front of sharp posterior angles which are distincly projecting outwards; lateroposterior depressions wide, deep, “agriloid” carina well defined, almost reaching midlength of lateral margins; prescutellar pit wide, shallow, basal tubercles on both sides of pit small but well defined; pronotal sculpture rather homogeneous, consisting of polygonal cells with small central grains. Scutellum very small, cordiform, about twice as wide as long, microsculptured, flat.

Elytra very slender, moderately convex, 3.2 times as long as wide, distinctly caudiform; humeral swellings relatively large, basal transverse depression wide, reaching scutellum; lateral margins deeply, widely emarginate at anterior third, than regularly tapering to caudiform, separately rounded, finely serrate apices; subhumeral carina very weak, almost indistinct; elytral epipleura very narrow, reaching serrate part of elytral apices; sculpture very fine, rather homogeneous, consisting of fine, transverse, zig-zag rugae which are finer and sparser on posterior half than those on anterior half of elytra.

Ventral surface lustrous, rather roughly ocellate, only three posterior ventrites finely ocellate; prosternum flat, only very slightly, transversely depressed along anterior margin; anal ventrite obtusely rounded, finely serrate, anal tergite flat with two groups of rather long, needle-like spines separated by deep, medial notch. Legs long, slender, anterior tibiae slightly curved, with inner, terminal row of short, pale bristles; mesotibiae almost straight, somewhat widened distally, metatibiae straight, inner margin slightly emarginate at distal third; meso- and metatarsi prolonged, slightly longer than tibia, basal tarsomere of hind tarsi as long as remaining tarsomeres together. Tarsal claws thin, hook-shaped, slightly enlarged at base.

Aedeagus ( Fig. 36 View Figs 30–39 ) spindle-shaped, flattened, only slightly bent dorsoventrally, both parameres and median lobe sharply pointed apically.

Sexual dimorphism. The female differs from the male by the much wider frons and vertex, smaller eyes with almost parallel inner margins, slightly different colouration (see above), straight, unmodified meso- and metatibiae which are somewhat longer than tarsi and by the concave anal tergite bearing much shorter spines.

Measurements. Length: 6.7–6.9 mm (holotype 6.7 mm); width: 1.3–1.4 mm (holotype 1.3 mm).

Variability. The pronotal width (1.2–1.3 times as wide as long) and the elytral length (3.2–3.3 times as long as wide) vary only slightly; a male paratype (Montagne des Singes) is distinctly darker having also rather uniform ventral colouration (bronze with somewhat more vivid colouration of metasternum and laterotergites).

Differential diagnosis. Agrilaxia prolonga sp. nov. cannot be attributed to any species-group of the genus Agrilaxia . It is quite characteristic and isolated from other species first of all by the prolonged, very slender body, absence of posthumeral carina, quite glabrous elytra and by the prolonged meso- and metatarsi which are longer than tibiae.

Etymology. The specific epithet is the Latin adjective prolongus (prolonged) to describe the prolonged body-shape of the species.

Distribution. French Guiana.