Alienosternus, Martins, 1976

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 : 23-24

Key to Alienosternus adults

According to the most recent key to Alienosternus species ( Martins 2003), the new species can be inserted as follows (translated and modified).

1. Head and prothorax reddish orange; elytra metallic green; antennae and legs black. Brazil (Rondônia, Mato Grosso) .............................................. Alienosternus metallicus Martins, 1976

– Overall colour brown to brownish red ................................................................................................ 2

2. Elytra with lateral carina from humerus to posterior fifth; elytral apex emarginate, with outer angle spiniform and rounded at sutural angle ( Figs. 1–4 ). Colombia (Bolívar) .............. ....................................... Alienosternus sanjacintero García, Botero, and Martínez , new species

– Elytra without lateral carina or with lateral carina restricted to anterior half, elytral apex truncate, and unarmed ............................................................................................................................ 3

3. Pronotum scabrous, microsculptured, with indistinct alveolus and a few granules; males with prosternal process elevated at centre and mesoventral process laterally elevated, ridged at centre, without setae in those elevations (males of A. wappesi unknown) .......................... 4

– Pronotum with alveolus and granules, sternal processes of males without modifications or with modifications different .................................................................................................................. 5

4. Surface of prosternum and prosternal process microsculptured, subrugose; prosternal process wider (width at narrowest point about half of procoxal cavity width) ( Figs. 5–8 ). Bolivia (Santa Cruz) ........................ Alienosternus wappesi García, Botero, and Martínez , new species

– Surface of prosternum only microsculptured laterally; prosternal process smooth, and narrower (about 1/4 of procoxal cavity width). Brazil (Mato Grosso, Goiás, Maranhão, Minas Gerais, Bahia) .................................................... Alienosternus solitarius (Gounelle, 1909)

5. Antennae of males without sexual pilosity; males with posterior half of prosternum with transverse row of setae. Females with wide prosternal process, not narrowed between the procoxae. Brazil (Mato Grosso, Mato Grosso do Sul, Goiás, Maranhão, Alagoas, Sergipe, Piauí, Bahia, Minas Gerais) ................................................ Alienosternus cristatus (Zajciw, 1970)

– Antennae of males with sexual pilosity; males with sternal processes without row of setae. Females with prosternal process laminiform between the coxae. Argentina (Salta, La Rioja, San Juan) ................................................................................ Alienosternus simplex Martins, 1976 .

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.