Two new species of the aphid genus Uroleucon (Hemiptera: Aphididae) living on Grindelia in the USA
Author
Barjadze, Shalva
63ABE1B2-8A56-42C8-BC34-1119D3A2ECBC
Institute of Zoology, Ilia State University, Giorgi Tsereteli 3, 0162, Tbilisi 0159, Georgia.
shalva.barjadze@yahoo.com
Author
Kanturski, Mariusz
78C290A3-D07B-4AF9-9358-ED8C05A702BF
Zoology Research Team, Institute of Biology, Biotechnology and Environmental Protection, Faculty of Natural Sciences, University of Silesia in Katowice, Bankowa 9, 40 - 007 Katowice, Poland.
mariusz.kanturski@us.edu.pl
text
European Journal of Taxonomy
2020
2020-12-16
729
42
53
journal article
9284
10.5852/ejt.2020.729.1189
6ee5fe37-06bc-4b27-9d5c-64db6fb64d77
4341036
5D9A5938-4858-4F8D-A50D-6E2CF5623E69
Uroleucon
(
Lambersius
)
grindeliae
sp.
nov.
urn:lsid:zoobank.org:act:
714DE06E-C8CB-4404-8FDA-569C01524ADC
Figs 1
,
3
,
Table 1
Diagnosis
Apterous viviparous
females
of
Grindelia
-feeding
Lambersius
share the following combinations of characters: PT 3.31–3.61 ×BASE; ANT III with 7–16 secondary rhinaria (
Fig. 3
a–b); URS 1.03– 1.37 ×BASE and 1.19–1.37×HT II with 6–9 short, fine, pointed accessory setae (
Fig. 3d
); HT I with 5:5:5 setae; SIPH subcylindrical, slightly tapering without a flange (
Fig. 3e
); its reticulated zone 0.27– 0.31 ×SIPH. SIPH 1.37–1.77
×
cauda and 0.24–0.30 ×BL; scleroites on setal bases absent on ABD I–V, while the setae on ABD VI–VIII arising from barely visible, rounded scleroites; cauda tongue-shaped with evident constriction near its base and with 9–12 setae (
Fig.
3f
).
Etymology
The name of the new species is derived from the host plant genus
Grindelia
.
Material examined
Holotype
USA
•
♀
apterous viviparous;
Oregon
,
Salt Marsh
,
near Newport
;
44°39′ N
,
124°1′ W
; alt.
113 m
;
19 Apr. 1980
;
Hille Ris Lambers
leg.;
Grindelia stricta
(=
G
.
hirsutula
);
NHMUK 010121473
.
Paratypes
USA
•
1 ♀
alate viviparous; same collection data as for holotype;
NHMUK 010121473
•
2 ♀♀
apterous,
2 ♀♀
alate viviparous; same collection data as for holotype;
NHMUK 010121465
•
1 ♀
apterous viviparous,
1 ♀
alate viviparous; same collection data as for holotype;
NHMUK 010121476
•
1 ♀
apterous viviparous,
1 ♀
alate viviparous; same collection data as for holotype;
NHMUK 010121478
•
1 ♀
apterous viviparous,
1 ♀
alate viviparous; same collection data as for holotype;
NHMUK 010121474
•
1 ♀
apterous viviparous,
1 ♀
alate viviparous; same collection data as for holotype;
NHMUK 010121475
•
1 ♀
apterous viviparous,
1 ♀
alate viviparous; same collection data as for holotype;
NHMUK 010121477
•
3 ♀♀
apterous viviparous,
2 ♀♀
alate viviparous; same collection data as for holotype;
DZUS 010121479
•
1 ♀
apterous,
1 ♀
alate viviparous; same collection data as for holotype;
NHMUK 010121480
.
Fig. 3.
Uroleucon
(
Lambersius
)
grindeliae
sp. nov.
, paratype, apterous viviparous female (NHMUK 010121474).
a
. ANT III.
b
. Secondary rhinaria on ANT III.
c
. ANT VI.
d
. Ultimate rostral (III–V) segments.
e
. Siphunculus.
f
. Cauda.
Description
Apterous viviparous female (n = 12)
COLOR IN LIFE. Unknown.
PIGMENTATION OF CLEARED SPECIMENS ON SLIDE. Body generally yellow to pale brown; ANT yellow with light brown ANT III (very basal part pale) or ANT yellow with darker apices of ANT III–V; coxae and trochanters pale; femora of legs yellow with very distal part light brown or uniformly yellow; tibiae yellow to light brown with slightly darker distal ends; tarsi light brown; SIPH pale to yellow with darker distal half; cauda pale (
Fig. 1b
).
MORPHOMETRIC CHARACTERS. HW 0.20–0.25 ×ANT. Head with thick, rigid setae with flat or narrowly capitate apices,
0.035
–0.049
mm
long. ANT tubercles each with 3 setae. ANT 0.82–0.96 ×BL. ANT III with 7–16 rounded secondary rhinaria of different sizes with sclerotized rims (
Fig. 3
a–b), ANT IV longer than ANT V. PT 3.31–3.61×BASE (
Fig. 3c
). Other antennal ratios: VI:III 0.90–1.18, V:III 0.57– 0.66, IV:III 0.65–0.72, PT:III 0.70–0.92, PT:IV 1.07–1.35 and PT:V 1.22–1.35. ANT chaetotaxy: ANT bearing thick, rigid setae with blunt or narrow capitate apices. ANT III setae
0.020
–0.042
mm
long, LS ANT III 1.00–1.20 ×BD III. ANT I with 4–6, ANT II with 3–4, ANT III with 12–15, ANT IV with 6–10 and ANT V with 5–8 setae. ANT VI with 3–4 basal, 3–4 apical and 3–5 setae on PT. Rostrum reaching hind coxae. URS 0.22–0.31×ANT III, 0.23–0.30×ANT VI, 0.29–0.38× PT, 1.03–1.37× BASE and 1.19–1.37×HT II with 6–9 short, fine, pointed accessory setae (
Fig. 3d
). Mesosternal furca fused, wide, T-shaped. Hind femora bearing medium length, thick, rigid setae with narrow capitate or slightly pointed setae,
0.020
–0.040
mm
long. Hind tibiae bearing thick, rigid setae with mostly slightly pointed or blunt, shorter than width of tibiae,
0.025
–0.050
mm
long. HT I with 5:5:5 setae, HT II 0.18–0.23 ×ANT III, 0.18–0.21×ANT VI, 0.23–0.27 ×PT and 0.80–1.00×BASE. SIPH subcylindrical, slightly tapering, straight with distinct zone of subapical reticulation and without a flange (
Fig. 3e
). Reticulated zone 0.27– 0.31 ×SIPH. SIPH 1.37–1.77×cauda, 0.24–0.30 ×BL and 1.08–1.33 ×ANT III. Abdomen membranous with medium length, thick rigid setae with narrowly capitate or blunt apices,
0.035
–0.045
mm
long on ABD I-V and
0.035
–0.050
mm
long on ABD VI–VIII. ABD VIII with 4 setae. Scleroites on setal bases absent on ABD I–V, while setae on ABD VI–VIII arising from very poorly visible, rounded and pale scleroites. Genital plate with two anterior setae longer than others, 7–10 posterior setae. Cauda tongueshaped with evident constriction near base, 1.55–2.52×its width at base and 0.14–0.19× BL, with 9–12 long and fine setae (
Fig. 3f
).
Alate viviparous female (n = 11)
COLOR IN LIFE. Unknown.
PIGMENTATION OF CLEARED SPECIMENS ON SLIDE. Head and thorax slightly sclerotized, pale to pale yellow; ANT yellow with light brown ANT III (except base) and brown basal part of ANT IV; coxae and trochanters pale; femora of legs yellow with very distal ends light; tibiae brown with paler middle section; tarsi yellow to light brown; SIPH yellow to brown with paler bases; cauda pale (
Fig. 1c
).
MORPHOMETRIC CHARACTERS. HW 0.18–0.20×ANT. Head with thick rigid setae with blunt or narrow capitate apices,
0.020
–0.035
mm
long. ANT tubercles each with 2–4 setae. ANT 0.81–1.13× BL. ANT III with 20–26 rounded secondary rhinaria of different sizes with sclerotized rims, ANT IV longer than ANT V. PT 3.33–3.83× BASE. Other antennal ratios: VI:III 0.89–1.09, V:III 0.62–0.68, IV:III 0.65– 0.76, PT:III 0.70–0.84, PT:IV 1.06–1.11 and PT:V 1.09–1.22. ANT bearing medium length thick and rigid setae with blunt or narrowly capitate apices. ANT III setae
0.020
–0.040
mm
long, LS ANT III 0.94–1.33 ×BD III. ANT I with 5–6, ANT II with 3–4, ANT III with 12–16, ANT IV with 7–10, ANT V with 7–8 setae. ANT VI with 3–4 basal, 4–5 apical and 3–4 setae on PT. Rostrum reaching mesosternum. URS 0.23–0.26×ANT III, 0.23–0.28 ×ANT VI, 0.31–0.35×PT, 1.03–1.37 ×BASE and 1.29–1.41 ×HT II with 7–9 fine-pointed accessory setae. Hind femora bearing medium length, thick rigid setae with narrowly capitate or slightly pointed setae,
0.020
–0.037
mm
long. Hind tibiae bearing thick, rigid setae with most slightly pointed or blunt, shorter than width of tibiae,
0.025
–0.050
mm
long. HT I with 5:5:5 setae, HT II 0.17–0.19 ×ANT III, 0.18–0.20×ANT VI, 0.23–0.25× PT and 0.78–0.97 ×BASE. SIPH subcylindrical, slightly tapering, straight with distinct zone of subapical reticulation and without a flange. Reticulated zone 0.32–0.40×SIPH. SIPH 1.55–1.71 ×cauda, 0.22–0.29×BL and 0.89– 1.00 ×ANT III. Abdomen membranous with medium length thick, rigid setae with narrowly capitate or blunt apices,
0.025
–0.045
mm
long on ABD I–V and
0.030
–0.052
mm
long on ABD VI-VIII. ABD VIII with 4 setae. Scleroites on setal bases absent on ABD I–V, while setae on ABD VI–VII arising from very poorly visible, rounded scleroites. Genital plate with two anterior setae longer than others, 8–10 posterior setae. Cauda tongue-shaped with evident constriction near base, 1.95–2.92×its width at base and 0.12–0.18×BL with 9–12 long, fine setae.
Remarks
Of the six
Grindelia
-feeding aphids of
Uroleucon
, only
U. penderum
,
U. robinsoni
sp. nov.
and
U. grindeliae
sp. nov.
have shared characters: (1) ANT III has the majority of the secondary rhinaria on the basal half, (2) their URS/HT II ratio is 1.15 or more and (3) the coxae and trochanters are pale (
Robinson 1986
;
Blackman & Eastop 2020
).
The apterous viviparous females of
U. grindeliae
sp. nov.
differ from the same morphs of
U. penderum
and
U. robinsoni
sp. nov.
in the following characters: (1) their ANT PT/BASE ratio is
3.31–3.58 in
U. grindeliae
, while it is
3.6–6.5 in
U. penderum
and
U. robinsoni
and (2) their ANT PT/CAUDA ratio is 1.00–
1.20 in
U. grindeliae
, while it is 1.5–2.0 in
U. penderum
and
U. robinsoni
(
Blackman & Eastop 2020
)
.
Biology and distribution
Representatives of this species live on
Grindelia hirsutula
in
Oregon
,
USA
. Other morphs and the life cycle of the new species are unknown.