Diabrotica matina Bechyne

Species name

Diabrotica matina Bechyné 1958: 548

Type locality

Costa Rica: Matina

Type depository

NMB, holotype, male, verified

Diagnosis

Body length 6.5-7.6 mm. Body width 3.1-3.9 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 4-8 and 11 brussels brown, antennomeres 9-10 light cadmium. Maxillary palpi and labrumlabrum:
the "upper lip" of beetles, a movable sclerite joined under clypeus
black or piceous. Pronotumpronotum:
the notum of the prothorax with highly sclerotized pronotal disc
yellow or mustard yellow, transverse, nonfoveate, shagreened with minute wrinkles. Scutellumscutellum:
small, usually triangular shield between the bases of elytra
piceous or black. Elytra yellow or rufous, with three black bandsbands:
(here) transverse maculae on the beetle elytra
, connected into four ring-shape maculae on each elytronelytron:
<em>(pl. elytra)</em> the fore highly sclerotized wing of beetle
, three of them on the discdisc:
the middle, more uniform area of a structure (usually elytra or pronotum) which is visible dorsally
and one on the side before the middle. Elytral epipleura yellow, darkened basally from 1/3 to 1/2. Sutural anglesutural angle:
the posterior angle or apex of the elytron near the suture
of elytra round, punctation dense, coarse. Abdomen yellow. Tarsi and tibiae black or piceous, femora bicolored, yellow, idarkened with black or brown from 1/2 to 2/3. 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

Costa Rica

Host plants

Unknown

Potential problems with identification

Diabrotica matina Bechyné is very similar to D. morosa Baly and D. f2n. They can be separated by the following features: procoxaprocoxa:
the first segment of fore legs
and mesocoxamesocoxa:
the first segment of middle legs
are black or brussels brown in D. matina, but yellow in D. f2n; mesosternummesosternum:
ventral plate of the mesothorax
and mesepisternummesepisternum:
anterior part of the mesothoracic pleuron before the pleural suture
yellow in D. matina, but black in D. morosa; mesepimeronmesepimeron:
posterior part of the mesothoracic pleuron
black or brussels brown in D. matina, but yellow in D. f2n. Elytral epipleura yellow, darkened basally in D. matina, but usually completely black with a pale narrow interior edge or (rarer) basally darkened in D. f2n and completely black or tinged with piceous in D. morosa. Femora bicolored, yellow, partially darkened with black or brown in D. matina; in D. f2n profemoraprofemora:
the femora of fore legs
bicolored, partially darkened with black or brown; meso- and metafemorametafemora:
femora of the hind legs
are bicolored, only apices are oartially darkened with black or brown; femora are black in D. morosa.