Diabrotica underwoodi Bowditch

Species name

Diabrotica underwoodi Bowditch 1911: 95

Type locality

San Jose, Costa Rica

Type depository

MCZ, holotype, male, verified

Diagnosis

Body length 6.7-7.2 mm. Body width 3.1-3.5 mm. Head basic color black. Antennae filiformfiliform:
slender antennae with antennomeres of similar shape
, bi- or tricolored, antennomeres 1-3 yellow, antennomeres 4-8 cinnamon brown, antennomeres 9-11 light cadmium. Maxillary palpi black or chestnut, 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 mustard yellow, quadrate, weakly bifoveate, with wide shallow foveae, not shagreened. Scutellumscutellum:
small, usually triangular shield between the bases of elytra
black or amber brown. Elytra yellow or rufous, vittatevittate:
(here) marked by longitudinally extended maculae different from the basic color of elytron
with two black laterallateral:
located near the sides of the body
vittae and two black vittae on elytral disk reaching almost elytral apexapex:
<em>(pl. apices)</em> the far distal end of a structure; opposite of base
; there is usually a short sutural vitta. Elytral epipleura completely yellow, sutural anglesutural angle:
the posterior angle or apex of the elytron near the suture
of elytra round, punctation dense, fine. Abdomen yellow. Legs yellow. Aedeagusaedeagus:
the main sclerotized part of the male genitalia; "aedeagus" is used here instead of "median lobe of aedeagus"
symmetric, with five internal sac scleritessclerites:
(here) the sclerotized hooks, spines or plates in the internal sac
.

Known distribution

Costa Rica

Host plants

Unknown

Potential problems with identification

Diabrotica underwoodi Bowditch is similar to D. curvilineata Jacoby, D. c1n and D. pl1n. They can be separated by the following features: head is black in D. underwoodi, but yellow in D. curvilineata and D. c1n; scutellumscutellum:
small, usually triangular shield between the bases of elytra
is black or amber brown in D. underwoodi, but yellow in all other species; tibiae are yellow in D. underwoodi, but black in D. curvilineata and D. c1n; antennae are filiformfiliform:
slender antennae with antennomeres of similar shape
in D. underwoodi, serrateserrate:
in reference to antennae, saw-like, often with a sharp ridge on the outer margin
or moniliformmoniliform:
(here) antennae with bead-like, slightly elongate and swollen antennomeres
in D. pl1n.