Agrilus occultus, Jendek & Nakládal, 2019

Jendek, Eduard & Nakládal, Oto, 2019, Revision of the Agrilus vittatus species-group (Coleoptera, Buprestidae, Agrilinae), Zootaxa 4629 (1), pp. 77-95 : 82-83

Agrilus occultus sp.nov.

( Figs. 2A , 3G , 5E, 5F )

Description of holotype. Size: 4.9 mm. Body dorsally dark-green; eyes slightly smaller than width of vertex (dorsal view); frons golden bluish-green; pronotum widest at anterior margin, anterior pronotal lobe very weak; elytra without pubescent stripes, glabrous; elytral apices separately shallowly rounded with denticulate margin; prosternal lobe large and arcuate; metasternal projection impressed.

Variability. Body length: 3.9–5 mm; color of paratypes violet-black, bronze-green or dark-green; elytra glabrous or with vestigial perisutural strips in apical third; elytral apices separately deeply rounded. Diagnosis. The species is homomorphic with A. babaulti and A. viridicupreus from which it can be distinguished only by the shape of medial lobe (penis) of aedeagus which is narrowly rounded or subacuminate at apex ( Figs. 3G , 5E, 5F ).

T ype material. Type locality: Laos North, Phongsaly province, 21°41’-2’N, 102°06’-08’E, Phongsaly env., altitude 1500m. Type specimens. Holotype ♂ (EJCB): “Lao-N, Phongsaly prov., 21°41’-2’N, 102°06’-08’E, Phon- gsaly env., 28.v.-20.vi.2003, 1500m, P. Pacholátko leg.” . Paratypes. LAOS. Houaphan. “Laos-NE, Hua Phan Province, Ban Saleui, Phou Pan ( Mt ), 20°12’N, 104°01’E, 1-31.v.2011, 1300-1900m, leg. C. Holzschuh ” 1 ♂ PT, 1 ♀ PT ( EJCB) . THAILAND. Chiang Mai. “NW Thailand, 19-23, Chiang Mai, 4.1991, Doi Suthep to Doi Pui, J. Horák leg.” 1 ♂ PT ( EJCB) . Mae Hong Son. “NW Thailand, 19.19N, 97.59E, Mae Hong Son, 1991, Ban Huai Po, 1600-2000m, 30.iv.-5.v., L. Dembický leg.” 1 ♂ PT ( EJCB) . “ Thai 10-13/5.1993, 19°27’N, 98°20’E, Soppong, 1550 m, Vít Kubáň leg.” 2 ♂ PT ( EJCB) . “ Thailand , 1- 8.5.1993, Soppong-Pai, 1800 m, Pacholátko & Dembický leg.” 1 ♂ PT ( EJCB) .

Distribution. LAOS: Houaphan, Phôngsali; THAILAND: Chiang Mai, Mae Hong Son.

Host plant. Unknown.

Etymology. The specific name is derived from the Latin adjective occultus (difficult to see) which refers to the species homomorphy (see Diagnosis).

Figures

FIGURES 2A–2H. Habitus of Agrilus. 2A, A. occultus sp.nov.; 2B, A. presbys Jendek. 2011; 2C, A. striatocollis Kerremans, 1892; 2D, A. terraereginae Blackburn, 1892; 2E, A. viridicupreus Saunders, 1866; 2F, A. viridifrons Kerremans, 1893; 2G, A. vittatus Deyrolle, 1864; 2H A. yunnanicola Obenberger, 1936.

FIGURES 3A–3J. Dry preserved aedeagus of Agrilus. 3A, Agrilus acacivorus sp.nov.; 3B, A. albizivorus sp.nov.; 3C, A. aurigaster Jendek, 2011; 3D, A. babaulti Théry, 1930; 3E, A. coco sp.nov.; 3F, A. monadikos sp.nov.; 3G, A. occultus sp.nov.; 3H, A. presbys Jendek. 2011; 3I A. striatocollis Kerremans, 1892; 3J, A. terraereginae Blackburn, 1892.

FIGURES 5A–5I. Aedeagus of Agrilus mounted in DMHF. 5A–5C, 5E, 5I medial lobe (penis) exposed, 5D, 5F, 5H medial lobe (penis) in natural position. 5A, Agrilus acacivorus sp.nov.; 5B, A. albizivorus sp.nov.; 5C, A. babaulti Théry, 1930; 5D, A. monadikos sp.nov.; 5E, A. occultus sp.nov.; 5F, A. occultus sp.nov.; 5G, A. terraereginae Blackburn, 1892; 5H, A. viridicupreus Saunders, 1866; 5I, A. viridifrons Kerremans, 1893.