Diabrotica undecimpunctata undecimpunctata Mannerheim

Species name

Diabrotica undecimpunctata undecimpunctata Mannerheim 1843: 310

Common name

Western spotted cucumber beetle

Type locality

Neu-Californiens [from title of work]

Type depository

FMNH-UH, lectotype, male, verified

Synonyms

soror LeConte 1865: 212 (type locality: California; type depository: MCZ, lectotype, female, verified)

Diagnosis

Body length 4.8-6.9 mm. Body width 2.4-3.9 mm. Head basic color black. Antennae filiformfiliform:
slender antennae with antennomeres of similar shape
, bi- or tricolored, antennomeres 1-3 yellow, upper sides darkened, antennomeres 4-11 black. Maxillary palpi and labrumlabrum:
the "upper lip" of beetles, a movable sclerite joined under clypeus
black. Pronotumpronotum:
the notum of the prothorax with highly sclerotized pronotal disc
yellow or sulphur yellow, subquadrate, bifoveate, with small round foveae, shagreened with minute wrinkles. Scutellumscutellum:
small, usually triangular shield between the bases of elytra
black. Elytra green, yellow or rufous, maculatemaculate:
(here) marked by maculae or patches of a different shape and size, usually clearly separated from each other
with 12 round black maculae. Elytral epipleura completely yellow, sutural anglesutural angle:
the posterior angle or apex of the elytron near the suture
of elytra round, punctation scattered, fine. Abdomen black. Legs black. Aedeagusaedeagus:
the main sclerotized part of the male genitalia; "aedeagus" is used here instead of "median lobe of aedeagus"
symmetric, with four internal sac scleritessclerites:
(here) the sclerotized hooks, spines or plates in the internal sac
.

Known distribution

USA: AZ, CA, OR, WA

Host plants

Beta vulgaris L., cantaloupe, cucumber, squash, gourd, sweet peas, beans, Austrian winter field pea (Lathyrus hirsutus L.), barley, rice, wheat, corn, tomato, potato, Cucurbitaceae, Fabaceae, Poaceae (Clark et al., 2004)

Potential problems with identification

Diabrotica undecimpunctata undecimpunctata can be separated from other subspecies by the following features: legs and abdomen entirely black in D. undecimpunctata undecimpunctata, partly pale in other subspecies.