Diabrotica paradoxa Jacoby 1887: 506
Teleman, Vera Paz, Guatemala
BMNH, lectotype, female, verified
Body length 5.4-6.4 mm. Body width 2.7-3.3 mm. Head basic color black. Antennae filiform, with thickened antennomeres 4-6, bi- or tricolored, antennomeres 1-3 yellow, upper sides darkened, antennomeres 4-8 brussels brown, antennomeres 9-10 yellow ocher, antennomere 11 dark apically. Maxillary palpi and labrum black. Pronotum yellow or mustard yellow, subquadrate, weakly bifoveate, with wide shallow foveae, not shagreened. Scutellum yellow. Elytra yellow or rufous, with three black bands on each elytron, sometimes separated by suture into two parts. Elytral epipleura completely yellow, sutural angle of elytra obtuse-angled, punctation scattered, fine. Abdomen yellow. Tarsi and tibiae black or chestnut, femora yellow. Aedeagus symmetric, with five internal sac sclerites.
We studied the type series of D. paradoxa in BMNH and in MCZ. The male paratype from Yzabal in BMNH and female paratype from Teleman in MCZ are different species.
Potential problems with identification
Diabrotica paradoxa Jacoby is very similar to D. pulchra (Sahlberg), D. p2n, D. p3n and D. p4n. They can be separated by the following features: there are three black bands on elytra in D. paradoxa, but four black bands on elytra in all other species; scutellum is yellow in D. paradoxa, but black or amber brown in all other species.