Alienosternus wappesi García, Botero, and Martínez, 2020

García, Kimberly, Botero, Juan Pablo & Martínez, Neis José, 2020, New species and new geographical records in South American Piezocerini (Coleoptera: Cerambycidae) with revised keys to species of Alienosternus and Hemilissa, The Canadian Entomologist 152 (1), pp. 18-35 : 22-23

Alienosternus wappesi García, Botero, and Martínez , new species

http://zoobank.org/ urn:lsid:zoobank.org:act:B6ACC9CD-4CD8-4843-89D1-70E5A1B46C0C .

Figures 5–8 .

Type material

Holotype female. BOLIVIA, Santa Cruz: Reserva Natural Potrerillo del Guenda , (Snake Farm, 400 m, 17°40 0 15 00 S, 63°27 0 26 00 W), 2–3.x.2013, Wappes and Skillman ( FSCA).

Diagnosis

This species can be distinguished from other species in the genus by the pronotum scabrous and microsculptured, with indistinct alveolus; surface of prosternum microsculptured and subrugose; prosternal process microsculptured, about half procoxal cavity width; elytral apex unarmed.

Description

Female. Integument dorsally dark brown. Head, basal antennomeres, pronotum, base and apex of femora, and tibiae darker; ventrites lighter.

Head. Dorsally entirely reticulate, microsculptured, and glabrous. Frons reticulate, microsculptured and with short, sparse setae, lacking median groove. Antennal tubercles weakly elevated, apex rounded. Anterior area of the gulamentum depressed, finely, transversely striate. Mandibles with long, sparse setae on base of outer surface. Distance between upper eye lobes six times width of one upper eye lobe. Antennae reaching elytral apex at antennomere XI. Antennomeres III–IV filiform, antennomeres V–X serrate, more so towards apical antennomeres, antennomere XI subglobose. Scape subalveolate, scabrous; with sparse setae on outer side. Antennal formula (ratio) based on length of antennomere III: scape = 0.71; pedicel = 0.21; IV = 1.00; V = 1.00; VI = 0.88; VII = 0.71; VIII = 0.58; IX = 0.54; X = 0.54; XI = 0.67.

Thorax. Prothorax subquadrate; sides rounded, posterior quarter distinctly constricted. Pronotum coarsely scabrous, with moderately long, erect, gold setae. Sides of prothorax with sculpture and setae as on pronotum. Prosternum microsculptured, subrugose, with moderately long, sparse setae. Prosternal process narrowed at middle and expanded laterally at apex; width at narrowest point about half of procoxal cavity width. Mesoventrite scabrous, with short, sparse setae. Mesoventral process wider than mesocoxal cavity width. Metanepisternum glabrous. Scutellum glabrous, with posterior margin rounded. Elytra coarsely, deeply, abundantly punctate in basal half, sparser and finer in posterior fourth; with moderately long, sparse setae throughout; apex unarmed, truncate. Legs with sparse, long setae, denser on apical half of ventral surface of tibiae. Femoral peduncle longitudinally sulcate ventrally and dorsally. Tibiae distinctly carinate.

Abdomen. Ventrites microsculptured laterally; with fine, shallow, sparse punctures, and short setae interspersed with long setae; ventrite I about as long as ventrites II–III together; apex of ventrite V rounded.

Measurements. Holotype, female, total length: 7.4 mm, prothorax length: 1.7 mm, prothorax width at widest point: 1.7 mm, elytral length: 5.2 mm, humeral width: 2.1 mm.

Etymology

Named for James Wappes ( ACMT), one of the collectors of the holotype who kindly provided the specimen for study .

Remarks

Alienosternus wappesi is similar to A. solitarius by the surface of pronotum scabrous, not forming alveolus; the other species of the genus have the surface of pronotum clearly alveolate. The new species differs from A. solitarius by the surface of prosternum and prosternal process microsculptured, subrugose, and the prosternal process wider (width at narrowest point about half of procoxal cavity width). In A. solitarius , the surface of prosternum is only microsculptured laterally, prosternal process is smooth and narrower (width at narrowest point about 1/4 of procoxal cavity width). According to Tavakilian and Chevillotte (2019), Alienosternus is from Brazil and Argentina; therefore, we first record this genus in Bolivia.

Figures

Figs. 1–8. 1–4, Alienosternus sanjacintero new species, holotype, female: 1, dorsal view; 2, ventral view; 3, lateral view; 4, details of head, frontal view. 5–8, Alienosternus wappesi new species, holotype, female: 5, details of head, frontal view; 6, dorsal view; 7, ventral view; 8, lateral view.