A new species of Polyamia DeLong (Hemiptera: Cicadellidae: Deltocephalinae: Deltocephalini) representing the first record of the genus from South America
Author
Duan, Yani
Author
Dietrich, Christopher H.
text
Zootaxa
2018
2018-08-10
4457
4
557
567
journal article
29045
10.11646/zootaxa.4457.4.5
cfb865bd-ba49-471b-92fa-4ee0e8843f11
1175-5326
1458041
9F90D5DD-7E59-4983-A640-6B9F0BCBF4F6
Polyamia
(
Polyamia
)
choromorica
sp. n.
(
Figs 5–6
)
Length.
Male: 3.0–
3.1 mm
; female:
3.2–3.6 mm
.
Coloration and morphology.
Ground colour pale brownish marked with brown, fuscous (
Fig. 5A–C
). Crown white with brown, fuscous marks. Pronotum with small paired fuscous spots anteriorly and six longitudinal brown stripes. Mesonotum and scutellum with fuscous marks (
Fig. 5A–B
). Face mostly dark brown, with paired white arcs (
Fig. 5D
). Forewing pale brownish, veins white, cell borders dark brown (
Fig. 5A–C
). Mesosternum dark brown. Femora and tibiae with fuscous marks (
Fig. 5C–D
).
Head wider than pronotum, anterior margin distinctly angulate in dorsal view. Crown longer than distance between eyes (
Fig. 5A–B
). Clypeal sulcus absent. Anteclypeus tapering to apex, extending beyond normal curve of genae. Lorum semicircular, narrower than anteclypeus, well separated from lateral margin of face (
Fig. 5D
). Pronotum slightly longer than vertex or nearly as long as vertex (
Fig. 5A–B
). Forewing exposing apex of pygofer or not, with numerous extra crossveins, especially in clavus (
Fig. 5A–C
).
Male genitalia.
Pygofer lobe long, apex rounded, with numerous macrosetae in distal half (
Fig. 6A–B
). Valve angulate caudally. Subgenital plate
3x
length of valve, subtriangular, lateral margin incurved, apex acute, with macrosetae arising laterally (
Fig. 6C
). Style with short articulatory arm; preapical lobe rectangular; apophysis digitate, apex acute, slightly laterally curved (
Fig. 6D
). Connective slightly shorter than aedeagus. Aedeagus with shaft in lateral view moderately long and slender, slightly tapered from base to apex and curved slightly dorsad, apex obliquely tapered; in ventral view slightly tapered, apex truncate with pair of small lateral projections (
Fig. 6E–F
).
Female.
Sternite VII with posterior margin undulate, without posteriolateral lobes (
Fig. 5E
).
Material
examined.
Holotype
:
♂
,
Argentina
:
Tucumàn
, 23 rd km
W Choromoro
,
1180 m
,
26°23′41"S
,
65°31′19"W
,
20 January 2008
,
C.H. Dietrich
, vacuum, AR29–1 (
MLP
)
.
Paratypes
:
2♂
,
2♀
, same data as holotype (
INHS
)
.
Remarks.
This species runs to
P
. (
P
.)
randa
DeLong & Thambimuttu
(couplet 1) in the key of
Sinada and Blocker (1994)
and is similar to that species, recorded from
Mexico
and
Panama
, in form and coloration, including structure of the male genitalia and female abdominal sternite VII.
Polyamia
(
P
.)
choromorica
sp. n.
is easily distinguished by the much less strongly curved aedeagal shaft, the vestigial dorsal aedeagal apodeme, and lack of a distinct emargination at the shaft apex.
Polyamia
(
P
.)
randa
DeLong & Thambimuttu
has the distal half of the aedeagal shaft oriented perpendicularly to the basal part and connective in lateral view.
Distribution.
Argentina
Etymology.
The specific epithet is based on the
type
locality.