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Species name

Diabrotica sedata Baly 1890: 48

 

Type locality

Brazil

 

Type depository

BMNH, lectotype, male, verified

 

Diagnosis

Body length 7.4-7.7 mm. Body width 4.0-4.2 mm. Head basic color yellow. Antennae filiform, bi- or tricolored, antennomere 1 yellow, upper sides darkened, antennomeres 2-8 uniformly cinnamon brown, antennomeres 9-10 yellow, partly infuscated, antennomere 11 dark apically. Maxillary palpi yellow or yellow ocher, labrum black or amber brown. Pronotum yellow or mustard yellow, subquadrate, weakly bifoveate, with wide shallow foveae, shagreened with minute wrinkles. Scutellum yellow. Elytra yellow or rufous, with two small black or chestnut spots in apical area and short humeral and sutural vittae. Elytral epipleura completely yellow, sutural angle of elytra obtuse-angled, punctation dense, fine. Abdomen yellow. Legs yellow. Aedeagus symmetric, with four internal sac sclerites.

 

Known distribution

Guatemala, Brazil

 

Host plants

Unknown

 

Potential problems with identification

Diabrotica sedata Baly is very similar to D. apicicornis Jacoby, D. brevilineata Jacoby, D. palpalis Jacoby, D. fulvicornis Jacoby and D. septemliturata Erichson. They can be separated by the following features: the head and maxillar palpi are black in D. palpalis and D. fulvicornis, yellow in D. sedata; the femora and maxillar palpi of D. apicicornis are black, but yellow in D. sedata; the labrum of D. brevilineata is yellow, but black or amber brown in D. sedata; D. sedata larger on average than all other species. However, the most reliable feature that allows distinguishing D. sedata is the armament of internal sac, which in D. sedata bears four sclerites, while only five in all other mentioned species.