Agrilus stigmula, Jendek & Nakládal, 2017

Jendek, Eduard & Nakládal, Oto, 2017, Revision of the Agrilus wittemani species - group (Coleoptera: Buprestidae: Agrilini) with description of three new species from India and Myanmar, Zootaxa 4365 (4), pp. 480-486 : 484

Agrilus stigmula sp. nov.

( Figs 1D , 2C )

Description of holotype. Size: 4.1 mm. Body. Shape: cuneiform, Build: robust, Profile: convex, Color (dorsally): unicolored. Head. Size: very large, Modification: strongly convex, Medial impression: absent, Vertex Sculpture elements: punctures, Sculpture density: dense, Sculpture intensity: superficial, 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. Pronotum. Shape: visually transverse, Sides: markedly arcuate, Maximal width: at middle, Anterior margin: subequal to posterior, Anterior lobe Development: obvious, Shape: arcuate, Width: broad, Position: projecting beyond anterior angles, Posterior angles Shape: obtuse, Apex: blunt, Disk Convexity: strongly convex, Impressions: posterolateral, Prehumerus Development: carinal, Shape: bisinuate, Extent: beyond 1/2 of pronotal length, Anterior end: adjoining to lateral carina, Posterior end: joined with posterior angle or margin, Arc: moderate, Lateral carinae Convergence: subparallel, Junction: absent, Modifications: submarginal carina anteriorly and posteriorly obliterate. Elytra. Color: unicolored, Humeral carina: absent, Apices Arrangement: separate, Shape: arcuate, Pubescence Pairs of spots: medial, Color: unicolored, Extent: entire ornamental. Sternum. Pubescence Strip of erect pubescence: absent, Prosternal lobe Size: large, Distal margin: subtruncate, Prosternal process Shape: subparallel, Sides: straight, Angles: obtuse, Disc: flat, Projection (length): protruding distinctly beyond angles, Metasternum Metasternal projection: impressed. Abdomen. Tomentum: present, Basal ventrite Modifications: without modifications, Pygidium Apical margin: arcuate, Last ventrite Shape: with wide apex, Disk: impressed, Sternal groove Extent: on apical ventrite, Shape on apex of last ventrite: angulately sinuate, Sinuosity (depth): markedly deep. Genitalia. Aedeagus Symmetry: symmetric, Shape: widest in apical part.

Variability. Known only from holotype.

Diagnosis. The species is very similar to A. stigmulifer sp. nov. by size and general habitus, but it differs from it mainly by having eyes larger and by prehumerus carinal and long. See also characters in the key.

Type material. Type locality: Myanmar, Yangon, Yangon [16°53'03”N, 096°08'35”E]. Type specimens . Holotype ♂ ( EJCB): “ Rangoon ”.

Distribution. Myanmar (Yangon).

Etymology. The specific name is a noun in apposition, which is derived from the Latin noun stigma (mark) and the suffix - ula (small). The name refers to round spot on each elytron of the species.

Figures

FIGURE 2. Aedeagi of Agrilus wittemani species–group. A: amorphus Kerremans, specimen from west Sumatra; B: A. amplinotus sp. nov., holotype; C: A. stigmula sp. nov. holotype; D: A. stigmulifer sp. nov. holotype; E: wittemani Jendek, holotype.

FIGURE1.Habitus of species of Agrilus wittemanispecies–group.A: A.amorphus Kerremans, specimen from west Sumatra; B: A. amplinotus sp. nov., holotype; C: A. chiangdaoensis Jendek, holotype; D: A. stigmula sp. nov., holotype; E: A. stigmulifer sp. nov., holotype; F: A.wittemani Jendek, holotype.