Agrilus ecalcaratus, Jendek, 2017

Jendek, Eduard, 2017, Revision of the Agrilus humilis species-group (Coleoptera: Buprestidae: Agrilini) with description of thirteen new species from Southeastern Asia, Zootaxa 4363 (2), pp. 249-271 : 261-262

Agrilus ecalcaratus sp. nov.

( Figs. 2A , 5F )

Description of holotype. Size: 3.6 mm. Body. Shape: cuneiform; Build: robust; Posterior tapering part: short with broad apex; Color (dorsally): unicolored. Head. Medial impression: absent; Epistoma: in plane with frons. Vertex: Sculpture elements: rugae; Sculpture aspect: arcuate. Eyes: Size: subequal to half 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 middle; Anterior margin: narrower than posterior. Anterior lobe: Development: obvious; Shape: arcuate; Width: broad; Position: at level with anterior angles. Posterior angles: Shape: rectangular. Disk: Convexity: strongly convex; Impressions: lateral only; Lateral impressions (depth): shallow. Prehumerus: Development: carinal; Shape: arcuate; Extent: to 1/3 of pronotal length; Anterior end: distant from lateral carina; Posterior end: joined with posterior angle or margin; Arc: moderate. Lateral carinae: Convergence: moderate; Junction: present; Narrowest point: at posterior 1/5–1/4 of marginal carina. Scutellum: Size: robust. Elytra. Color: unicolored; Humeral carina: absent. Apices: Arrangement: conjoint; Shape: arcuate. Pubescence: Color: unicolored; Character: homogenous; Extent: proximal and distal; Proximal (shape): like V, X, Y, T; Distal (shape): preapical. Sternum. Pubescence: Strip of erect pubescence: absent. Prosternal lobe: Size: large; Position to sternum: markedly declivous; Distal margin: arcuately emarginate; Emargination (depth): deep; Emargination (width): wide. Prosternal process: Shape: subparallel; Sides: straight; Angles: obtuse; Disc: flat; Projection (length): protruding distinctly beyond angles. Metasternum: Metasternal projection: flat. Abdomen. Tomentum: absent. Basal ventrite: Modifications: with impression(s). Pygidium: Apical margin: arcuate. Last ventrite: Disk: impressed. Sternal groove: Extent: on apical ventrite; Shape on apex of last ventrite: arcuately sinuate; Sinuosity (delimitation): angulate; Sinuosity (depth): markedly deep; Sinuosity (width): markedly wide. Legs. Metatarsus: Length to metatibia: distinctly shorter. Tarsomere 1: Length to following tarsomeres: shorter or subequal to 2–3. Genitalia. Aedeagus ( Fig. 5F ): Symmetry: symmetric; Shape: widest in basal part; Profile: convex; Modifications: markedly bent.

Variability. Size: 3.2–4.1 mm. The extent and shape of elytral pubescence varies considerably in both, proximal and distal part. Sexual dimorphism. The male has the basal ventrite with feeble impression. Frons, antennae, legs and pronotal sides has golden–green hue.

Diagnosis. Agrilus ecalcaratus sp. nov. belongs to the group of species with expanded proximal part of aedeagus ( Tab. 1) ( Fig. 5F ). It differs from them by lacking cluster of setae on apex of metatibiae.

Type material. Type locality: Vietnam, Lam Dong, Dalat city [11°56'00”N, 108°27'00”E]. Type specimens. VIETNAM . Holotype ♂ ( FWPC), 15 PT ( EJCB): “ Vietnam, 21–27.iv.1994, Dalat city, Pacholátko & Dembický leg.”. 12 PT ( EJCB): “S Vietnam, 11.54N – 108.27E, 10 km S of Dalat , 1500 m , 16.IV.1995, Pacholátko & Dembický leg.”. INDIA . 3 ♂ PT ( EJCB): “NE India, Meghalaya, ~ 8 km N of Shillong , 25°38’ N 91°54’ E; ~ 1200m , L. Dembický leg., 7.–9.v.2004 ”. LAOS . 1 ♀ PT ( EJCB): “ Muong P[omh] [illegible text] 20.iii.64, Laos ( Baudon )” ; 1 ♂ PT ( EJCB): “ Pak Ca Dinh, 15.v.63, Laos ( Baudon )” ; 1 ♂ PT ( EJCB): “ Laos –NE, Hua Phan Province, Ban Saleui, Phou Pan ( Mt ), 20°12'N, 104°01'E, 7.iv–25.v.2010, 1300–1900m, leg. C. Holzschuh ” ; 1 ♀ PT ( EJCB): “ Laos, Hua Phan prov. 2004, Ban Saluei env., alt. 1500m , 30 km S of Xam Neua , Phu Phan Mt., 6– 17.5.2004, 103°59'33''E, 20°13'39'' N, P. Kresl leg.” ; 1 ♀ PT ( EJCB): “ 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 ( EJCB): “ Laos –N, 23.iv.1999, Louangphrabang prov. 20°42' N 102°54'E, 25 km E Muang Ngoy , 1000 m , Vít Kubáň leg.”; 1 ♂, 1 ♀ PT ( EJCB): “ Laos C, Vientiane prov., 55km N Vientiane, Ban Vangheua , 1000 m , Phou Khao Khouay N.P., 102°49'E, 18°27'N, 4–18.v., P. Kresl leg. 2005”. THAILAND . 3 ♂, 2 ♀ PT ( EJCB): “NW Thai, 25.4.– 5.5.1992, Soppong–Pai pass, P. Pacholátko leg.” ; 1 ♂, 2 ♀ PT ( EJCB): “ Thailand, 1– 8.5.1993, Soppong–Pai , 1800 m, Pacholátko & Dembický leg.” ; 1 ♂ PT ( EJCB): “ Thailand 10– 13.5.1993, 19°27'N, 98°20'E, Soppong , 1550 m , L. Bocák leg.”; 1 ♂ PT ( EJCB): “ Thai 10–13/5.1993, 19°27'N, 98°20'E, Soppong , 1550 m , Vít Kubáň leg.”; 1 ♀ PT ( EJCB): “ Thailand, Prov. Prachin Buri, Sakaerat Ecol. Research Institute , 16.vi.2001 ” ; 1 ♂ PT ( EJCB): “ Thai, 28.IV.–6.V.1991, Umphang riv., 1000 m, 16°07'N, 99°00'E, Vít Kubáň leg.”.

Distribution. India (Meghalaya); Laos (Bolikhamxai, Houaphan, Louangphabang, Vientiane); Thailand (Mae Hong Son, Nakhon Ratchasima, Tak); Vietnam (Lam Dong).

Etymology. The specific name is an adjective and is derived from the Greek ek (out of) and Latin calcar (spur). It refers to lacking spur–like cluster of setae on metibiae, which is frequently present in species of A. humilis species group.

Figures

FIGURE 2. Habitus of species of Agrilus humilis species–group. A: A. ecalcaratus sp. nov., holotype; B: A. incrassatus sp. nov., holotype; C: A.korbicola sp. nov., holotype;D:A.oidemasp.nov., holotype;E: A.sphenopterus sp.nov., holotype; F: A. suturistriatus sp. nov., holotype;

FIGURE5. Aedeagi of primary types of Agrilus humilis species–group.A: A. aruensis sp. nov.; B: A. bicoloripennis sp. nov.; C: A. chloros sp. nov.; D: A. dilatometatibialis Jendek; E: A. duffelsorum sp. nov.; F: A. ecalcaratus sp. nov.; G: A. humilis Kerremans; H: A.incrassatussp. nov.; I: A.korbicolasp. nov.; J: A. oidemasp. nov.; K: A.pilosotibialis Descarpentries; L: A. richardae Descarpentries & Villiers; M: A. sphenopterus sp. nov.; N: A.suturistriatus sp. nov.; O: A. thailandicus sp. nov.; P: A.traymanyi Baudon; Q:A. vogti sp. nov.