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Species name

Diabrotica lacordairei Kirsch 1883: 199

 

Type locality

Bogota, Colombia

 

Type depository

MTD, lectotype, female, verified

 

Synonyms

morosa Jacoby 1887: 503 (figure and part of description, Panama records = lacordairei Kirsch)

 

Diagnosis

Body length 7.5-9.0 mm. Body width 4.1-4.5 mm. Head basic color black. Antennae filiform, bi- or tricolored, antennomeres 1-3 yellow, upper sides darkened, antennomeres 4-8 brussels brown, antennomeres 9-10 light cadmium, antennomere 11 brussels brown. Maxillary palpi black or piceous, labrum black. Pronotum yellow, mustard yellow or buff yellow, transverse, nonfoveate, not shagreened or with minute tubercles. Scutellum piceous or black. Elytra yellow or rufous, with three black bands, connected into four ring-shape maculae on each elytron, three of them on the disc and one on the side before the middle. Elytral epipleura completely black or tinged with piceous, sometimes apical half infuscated. Sutural angle of elytra dentiform, punctation dense, fine. Abdomen yellow or pygidium (at least the apex) black. Tarsi and tibiae black or chestnut. Femora bicolored, apex (approximately 1/3) is darkened with black or brown, or from 1/2 to 2/3 is darkened with black or brown. Aedeagus symmetric, with five internal sac sclerites.

 

Known distribution

Panama, Colombia, Brazil, Ecuador

 

Host plants

Unknown

 

Remarks

The lectotype and paralectotype of D. lacordairei in the Kirsch collection in MTD are females. We studied a long series of specimens (about 20) in the BMNH collection identified as 'lacordairei' and a series of specimens (11) in the MCZ collection identified as 'consentanea' (because on the handwritten label in the USNM collection J.L. Krysan noted that D. consentanea Baly is a possible synonym of D. lacordairei Kirsch). We studied the type of D. consentanea, female in the BMNH collection. At least 17 of studied specimens match with Kirsch's (1883), Jacoby's (1887) and Baly's (1890) descriptions of D. lacordairei. They are morphologically very similar to female types of D. lacordairei and D. consentanea too. However, the color of pygidium is black in all males and in a few females. Neither Kirsch, nor Jacoby and Baly mentioned black pygidium in D. lacordairei. It is the only feature distinguishing these male specimens from the type of D. lacordairei . We studied the female from Panama with yellow pygidium. No substantial differences were found between this female and the female type of D. lacordairei. Therefore, we assume that black pygidium is a color variety in D. lacordairei and we treat the males with black pygidium as the males of this species.

 

Potential problems with identification

Diabrotica lacordairei Kirsch is similar to D. morosa Jacoby. They can be separated by the following features: in D. lacordairei procoxa, mesocoxa, mesosternum, mesepisternum, mesepimeron and metepimeron are yellow; but in D. morosa procoxa, mesocoxa, mesosternum, mesepisternum and mesepimeron are black or brussels brown, metepimeron black or darken with brown (from yellow ocher to amber brown). D. morosa is more slender and substantially smaller than D. lacordairei.