Agrilus xia, 2019

Jendek, Eduard & Grebennikov, Vasily V., 2019, Twenty more new species of Agrilus (Coleoptera: Buprestidae: Agrilinae) from the Oriental region, Zootaxa 4564 (2), pp. 449-469 : 462-463

Agrilus xia sp. nov.

( Figs. 1A , 5A )

Description of holotype. Body length: 7.3 mm. BODY. Shape: subparallel, Color (dorsally): unicolored. HEAD. Size: very large, Modification: strongly convex. Vertex. Medial impression: present, Sculpture elements: rugae, Sculpture aspect: arcuate, Sculpture density: dense. Eyes. Size: subequal or larger than width of vertex (dorsal view), Lower margin: in line or below antennal socket, Median orbit: converging ventrally. Antennae. Serration: from antennomere 4, Antennomeres 7–10: with obvious petiole. PRONOTUM. Shape: visually elongate or square, Sides: slightly arcuate, Maximal width: at middle, Anterior margin: subequal to posterior. Anterior lobe. Development: obvious, Shape: arcuate, Width: broad, Position: at level with anterior angles. Posterior angles. Shape: obtuse, Apex: sharp. Disk. Convexity: flat, Impressions: medial and lateral, Medial impression: entire, Lateral impressions (depth): shallow, Lateral impressions (width): narrow. Prehumerus. Development: obsolete, Extent: adjoining posterior angle, Posterior end: joined with posterior pronotal angle or margin. Lateral carinae. Convergence: moderate, Junction: present, Narrowest point: at posterior 1/5–1/4 of marginal carina. Scutellum. Size: robust. ELYTRA. Humeral carina: absent. Apices. Arrangement: separate, Shape: arcuate. Pubescence. Extent: distal only, Distal (shape): perisutural stripe. STERNUM. Pubescence. Strip of erect pubescence: absent. Prosternal lobe. Size: large, Distal margin: arcuately emarginate, Emargination (depth): shallow, Emargination (width): wide. Prosternal process. Width: wide, Shape: markedly dilated, Sides: straight, Angles: obtuse, Angles (tips): blunt, Disc: flat, with cluster of setae, Projection (length): protruding distinctly beyond angles. Metasternum. Modification: with cluster of setae above metacoxal plates. ABDOMEN. Tomentum: absent. Basal ventrite. Modifications: with tubercle(s). Pygidium. Apical margin: arcuate. Sternal groove. Extent: on all ventrites, Shape on apex of last ventrite: arcuately sinuate. LEGS. Metatarsus. Length to mesotarsus: obviously longer, Length to metatibia: somewhat shorter. Metatarsomere 1. Length to following tarsomeres: subequal or longer than 2–4. GENITALIA. Aedeagus. Symmetry: symmetric, Shape: widest in apical part, Modifications: parameres with obvious membranous lobes.

Variability. The species is known only from the holotype.

Diagnosis. Agrilus xia sp. nov. is similar to the Palaearctic A. graminis Kiesenwetter, 1857 by the habitus, by the pattern of the elytral pubescence, and by the clusters of setae on the prosternum. The new species can be distinguished by the unmodified antennae in the males, by the obsolete prehumerus, by the large prosternal lobe, by two clusters of setae on the prosternum, with the larger cluster at the base and the smaller cluster on the apex of prosternal process (one cluster in A. graminis ), and by the presence of a single hook-like tubercle in the middle of the basal ventrite.

Type material. Type locality: North Laos, Phongsaly province, Phongsaly env., 21°41'–2'N, 102°06'–08'E, altitude ~ 1500m. Type specimens. Holotype ♂ ( EJCB): “Lao-N, Phongsaly prov., 21°41'–2'N, 102°06'–08'E, 28.v.–20.vi.2003 Phongsaly env., ~ 1500m, Vít Kubáň leg.”.

Distribution. LAOS: Phôngsali.

Figures

FIGURES 1A–1F. Holotypes of Agrilus, habitus in dorsal view. 1A, A. xia sp. nov. (7.3 mm); 1B, A. hergovitsi sp. nov. (5.4 mm); 1C, A. zao sp. nov. (6.0 mm); 1D, A. wos sp. nov. (5.7 mm); 1E, A. uxo sp. nov. (5.7 mm); 1F, A. xen sp. nov. (5.0 mm).

FIGURES 5A–5N. Aedeagi of Agrilus holotypes. 5A, A. xia sp. nov.; 5B, A. hergovitsi sp. nov.; 5C, A. zao sp. nov.; 5D, A. wos sp. nov.; 5E, A. uxo sp. nov.; 5F, A. xen sp. nov.; 5G, A. yuk sp. nov.; 5H, A. xis sp. nov.; 5I, A. qom sp. nov.; 5J, A. jum sp. nov.; 5K, A. ika sp. nov.; 5L, A. kon sp. nov.; 5M, A. hik sp. nov.; 5N, A. yoa sp. nov.