Revision of the Australian planthopper genus Chidaea Emeljanov with a redescription of Cixius sidnicus Stål, 1859 (Hemiptera: Auchenorrhyncha: Fulgoromorpha: Cixiidae)
Author
Löcker, Birgit
Author
Holzinger, Werner E.
text
Zootaxa
2019
2019-11-04
4691
5
401
443
journal article
24992
10.11646/zootaxa.4691.5.1
1bdb44ea-c474-40cc-83a2-e0e4b45310aa
1175-5326
3527426
5B0FFE9A-AF71-49E3-85D4-5F0CF3C07CF7
Chidaea wilarra
sp. nov.
(
Figs 16
,
30
,
31D
)
Zoobank Registration: http://zoobank.org/
urn:lsid:zoobank.org:act:
49CCCC44-4D5F-4EB8-865B-460910583956
Types.
Holotype
,
♂
,
AUSTRALIA
, NSW:
Barren Ground
[s],
16.xi.1958
(
C.E. Chadwick
) (
ASCU
ASCT00180039
)
.
Paratypes
,
NSW
:
1 ♂
, same data as holotype (
ASCU
)
;
1 ♂
,
Clyde Mountain
(near top of highway pass),
28.xii.1994
(
A. Sundholm
,
R. De Keyzer
) (
ANIC
)
.
Etymology.
The term ‘wilarra’ means ‘moon or crescent’ in Yindjibarndi, an Aboriginal language spoken in
Western Australia
(
Thieberger & McGregor 1994
). Named after the crescent-shaped aedeagal spines.
Colour.
Entire specimen with a reddish brown tinge. Vertex mid or dark brown with slightly paler carinae. Frons mid brown, slightly darker near frontoclypeal suture; carinae concolorous or only slightly paler. Post- and anteclypeus darker than frons, dark brown to black with concolorous carinae. Pronotum light brown to reddish brown. Mesonotum slightly darker than pronotum, mid brown with concolorous carinae. Forewings light brown, tubercles and veins concolorous light brown. Legs and body light brown.
Morphology.
Body length:
♂
5.9–6.6 mm
.
FIGURE 16.
Chidaea wilarra
: A habitus; B–D head.
Head: Vertex 2.2–2.3 x wider than long; median carina of vertex covering 1/3–3/4 of basal compartment of vertex; absent in apical compartment. Frons 1.0–1.1 x longer than wide; position of maximum width distinctly dorsad of centre of frontoclypeal suture; lateral carinae of frons in facial view convex, rectilinear apically or convex, evenly rounded. Frontoclypeal suture strongly semicircular, bent upwards, median part just or just not reaching lower margin of antennal scape. Postclypeus with median carina well developed. Anteclypeus with median carina moderately developed or evanescent. Rostrum reaching hind coxae.
Thorax: Hind margin of pronotum obtusely angled or rectangular. Mesonotum with median carina moderately developed, evanescent near posterior end; lateral carinae moderately developed. Forewing 3.3–3.5 x longer than wide; concavity at costal border absent; costal margin with 24–25 tubercles; fork of ScP+RA and RP basad of fork CuA1 and CuA2; tubercles of forewing dark or pale, concolorous with veins; ScP+RA apically bifid or unforked; RP trifid; additional subapical cell between branches of MP1 and MP2 absent; MP1+2 and MP3+4 trifid; 12 apical cells; 6 subapical cells. Hind leg: tibia with 6 apical spines; 1
st
tarsomere
with 8 apical teeth and no platellae; 2
nd
tarsomere with 10 apical teeth and 8 platellae.
FIGURE 17.
Chidaea algida
: A aedeagus left lateral; B aedeagus ventral; C aedeagus right lateral; D–E anal tube; F–G genital styles.
FIGURE 18.
Chidaea armidalensis
: A aedeagus left lateral; B aedeagus ventral; C aedeagus right lateral; D–E anal tube; F–G genital styles.
FIGURE 19.
Chidaea belairensis
: A aedeagus left lateral; B aedeagus ventral; C aedeagus right lateral; D–E anal tube; F–G genital styles.
FIGURE 20.
Chidaea bobadeenensis
: A aedeagus left lateral; B aedeagus ventral; C aedeagus right lateral; D–E anal tube; F–G genital styles.
Male genitalia: Anal tube as in
Figs 30
D–E. Pygofer and genital styles as in
Figs 30
F–G. Aedeagus (
Figs 30
A–C): Phallotheca narrow, near base with a bifurcate ventral process on a prominent stalk that is strongly curved in lateral view; phallotheca left laterally with a medium sized, strongly curved (sickle-shaped) spine (a) that is partly concealed by the phallotheca in ventral view; phallotheca with a slightly longer, strongly curved (sickle-shaped) spine (b) that arises ventro-laterally. Aedeagal spines not reaching bifurcate ventral process.
Diagnosis.
Chidaea wilarra
shares the following combination of characters with
Ch. armidalensis
,
Ch. dickinsonorum
,
Ch. dayi
and
Ch. pulyonna
: absence of platellae on the first hind tarsomere and tubercles on the forewing that are concolorous with veins. See diagnosis section of
Ch. dayi
and
Ch. pulyonna
for details on how to differentiate these species from
Ch. wilarra
.
Both,
Ch. wilarra
and
Ch. dickinsonorum
have spine (b) arising a little bit further down the aedeagus shaft (closer to base of aedeagus) than spine (a) and its tip also reaching further down. This gives the aedeagus an asym- metrical appearance which resembles a person with uneven shoulders. These two species can be distinguished by the curvature of spine (b): in
Ch. wilarra
both spines are about equally strongly curved, whereas in
Ch. dickinsonorum
spine (a) is strongly curved whilst spine (b) is almost straight in lateral view. These species also differ in the insertion of spine (b): in
Ch. wilarra
spine (b) arises ventro-laterally, in
Ch. dickinsonorum
laterally.
Distribution:
NSW.