A key to the Mymaridae (Hymenoptera) egg parasitoids of proconiine sharpshooters (Hemiptera: Cicadellidae) in the Nearctic region, with description of two new species of GonatocerusAuthorTriapitsyn, Serguei V.textZootaxa20061203138journal article5080310.5281/zenodo.172335076b5447-7740-4af0-aef5-e34d9724424f11755326172335Anagrus eposGirault, 1911
(
Fig. 2
)
Anagrus epos
Girault 1911: 292
–293.
Anagrus epos
Girault
: Triapitsyn 1998: 99–103
(redescription, diagnosis, distribution, host
associations
); Hoddle and Triapitsyn 2004b: 343.
Type
locality
Centralia, Marion Co., Illinois,
USA
.
Material examinedUSA
. CALIFORNIA: Riverside Co., Riverside, UCR Quarantine Lab., numerous females and males from the colony on
Homalodisca coagulata
(Say)
eggs in leaves of
Euonymus japonica
, reared during
vi–ix.2004
by V.V. Berezovskiy and S.V. Triapitsyn and since
ix.2004
by R. Krugner; originally from: MINNESOTA, Clay Co., ca.
4 mi
. SEE Glyndon, Bluestem Prairie (Nature Conservancy Preserve, moist tallgrass prairie),
46.85521°N
,
96.47353°W
,
31.v–1.vi.2004
, R.A. Rakitov (ex. egg masses of
Cuerna fenestella
Hamilton
on
Solidago
sp. and
Zigadenus
sp.; emerged in UCR quarantine
8–14.vi.2004
, coll. by S.V. Triapitsyn and V.V. Berezovskiy) [numerous females and males,
UCRC
]. MASSACHUSETTS, Middlesex Co., Cambridge,
27.viii.1942
, H.L. Dozier (“reared from blackberry infested with
Erythroneura maculata
”) [
1 female
,
USNM
]. MINNESOTA, Clay Co., ca.
4 mi
. SEE Glyndon, Bluestem Prairie (Nature Conservancy Preserve, moist tallgrass prairie),
46.85521°N
,
96.47353°W
,
1–3.vi.2004
, R.A. Rakitov [
1 male
,
UCRC
].
Diagnosis
Body length 300–600. Body mostly yellow, with a conspicuous dark band across the gaster in the specimens from Minnesota (
Fig. 2
). Female antenna with F1 subglobular, less than half length of pedicel; F2–F5 usually subequal, F6 longest of funicular segments; F3–F5 usually with 1 longitudinal sensillum each, F6 with 2, and clava with 5 longitudinal sensilla. Mesoscutum with a pair of adnotaular setae. Forewing 8.0–9.5x as long as wide; with 1 to 3 irregular rows of discal setae (1 such row on basal 1/3 of blade beyond venation), leaving a well differentiated bare area in broadest part of blade near posterior margin. Ovipositor at least slightly, sometimes markedly exserted beyond apex of metasoma. Outer plates of ovipositor each with 3 setae, rarely with 2. Ovipositor: foretibia ratio 2.4–3.1:1. Male similar to female except for normal sexually dimorphic characters and a darker body color.
DistributionMexico
(Baja California and Sonora) and
USA
(Colorado, Illinois, Kentucky, Massachusetts (new record), Minnesota, New
Mexico
, and New York) (Triapitsyn 1998). Recently released in California against
H. coagulata
(
Pilkington
et al.
2005
)
.
HostsCuerna fenestella
Hamilton (
Triapitsyn and Rakitov 2005
)
as well as
Dikrella
sp.,
Erythroneura aclys
McAtee
,
E. bistrata
McAtee
,
E. comes
(Say)
,
Erythroneura maculata
Gillette
(new record),
E. variabilis
Beamer
,
E. vulnerata
Fitch
, and undetermined
Erythroneura
spp. (Triapitsyn 1998); also
Homalodisca coagulata
(Say)
(under laboratory conditions only) (
Hoddle and Triapitsyn 2004b
;
Triapitsyn and Rakitov 2005
).
Comments
A colony of this species successfully reproduced on
H. coagulata
eggs at UCR Quarantine Laboratory and is considered a potentially promising biological control agent for introduction against glassywinged sharpshooter in California (
Hoddle and Triapitsyn 2004b
). The colony was established from the specimens collected in Minnesota, which emerged in UCR quarantine (see “Material Examined”); mated females were then exposed to fresh eggs of
H. coagulata
(laid in leaves of
Euonymus japonica
) on
9.vi.2004
, and the next generation emerged
29–30.vi.2004
(vouchered in UCRC are
5 females
and
1 male
of these first generation wasps).