Agrilus siberuticola, Jendek, 2018

Jendek, Eduard, 2018, Revision of the Agrilus gratiosus species-group (Coleoptera, Buprestidae, Agrilinae), Zootaxa 4433 (3), pp. 478-490 : 486

Agrilus siberuticola sp. nov.

( Fig. 2B )

Description of holotype Size: 6.4 mm. BODY. Shape: cuneiform, Build: robust, Profile: convex, Color (dorsally): unicolored. HEAD. Size: very large, Modification: strongly convex, Medial impression: shallow. Vertex Medial impression: present, Sculpture elements: rugae, Sculpture aspect: arcuate. Eyes Size: subequal or larger than width of vertex (dorsal view), Lower margin: in line or below antennal socket, Median orbit: subparallel. Antennae Serration: from antennomere 4. PRONOTUM. Shape: visually transverse, Sides: slightly arcuate, Maximal width: at posterior margin, Anterior margin: narrower than posterior. Anterior lobe Development: obvious, Width: broad, Position: projecting beyond anterior angles. Posterior angles Shape: acute, Apex: sharp. Disk Impressions: medial and lateral, Medial impression: entire, Lateral impressions (depth): deep, Lateral impressions (width): broad. Prehumerus Development: carinal, Shape: arcuate, Extent: to 1/2 of pronotal length, Anterior end: distant from lateral carina, Posterior end: joined with posterior angle or margin, Arc: weak. Lateral carinae Interspace: narrow, Convergence: moderate, Junction: present, Narrowest point: at posterior 1/5–1/4 of marginal carina. ELYTRA. Color: unicolored, Humeral carina: absent. Apices Arrangement: conjoint, Shape: arcuate, Modifications: margin obviously denticulate. Pubescence Extent: entire ornamental. STERNUM. Prosternal lobe Size: large, Distal margin: arcuate. Prosternal process Width: wide, Shape: subparallel, Sides: straight, Angles: obtuse, Angles (tips): blunt, Disc: flat, Projection (length): protruding distinctly beyond angles. Metasternum Metasternal projection: flat. ABDOMEN. Pygidium Apical margin: arcuate. Last ventrite Shape: with narrow apex. Sternal groove Extent: on all ventrites, Shape on apex of last ventrite: arcuate. LEGS. Metatarsus Length to metatibia: distinctly shorter. GENITALIA. Ovipositor Shape: elongate.

Variability. Size: 6.2–6.6 mm. Sexual dimorphism. Male unknown.

Diagnosis. Among A. gratiosus species –group, A. siberuticola sp. nov. belongs to subgroup with transverse pubescent band at apical third of elytra. The species is distinctive by larger size and by bright blue color of elytra.

Type material. Type locality. Mentawai Islands., South Siberut island, altitude 0–50 m, Salapa village env. Type specimens. Holotype ♀ ( EJCB): “ Indonesia, Mentawai Isls., S. Siberut isl., x.2006 , 0–50m, Salapa vill. env., S. Jákl leg.”; 1 ♀ paratype ( EJCB): “ Mentawai Islands , S Siberut Isl., 3–4.2005, 50–100 m ” ; 1 ♀ paratype ( EJCB): “ Indonesia, 12–2006, Mentawai Isls., N. Siberut Isl., Bojakan vill.”.

Distribution. INDONESIA: West Sumatra (Mentawei Islands, Siberut Island).

Etymology. The name is combination of Siberut (the island from the type locality) and the Latin verb colo (to dwell, inhabit).

Figures

FIGURES 2A–2D. Habitus of species of Agrilus gratiosus species–group. A: A. gratiosus Deyrolle, 1864, specimen from Malaysia: Sabah, 5.3 mm; B: A. siberuticola sp. nov., holotype, 6.4 mm; C: A. pergratus sp. nov., holotype, 5.4 mm; D: A. transverus Kerremans 1894, specimen from Indonesia: Java, 5.4 mm.