Ericaphis voegtlini, Barjadze, Shalva, Jensen, Andrew S. & Kanturski, Mariusz, 2018

Barjadze, Shalva, Jensen, Andrew S. & Kanturski, Mariusz, 2018, Ericaphisvoegtlini, a new, unusual aphid species from the USA (Hemiptera, Aphididae), ZooKeys 785, pp. 133-143 : 134-138

Ericaphis voegtlini sp. n. Figures 1, 2, 3, 4; Table 1

Diagnosis.

Apterous viviparous females differ from other Ericaphis by having a well–developed quadrangular median frontal tubercle, and long and rigid dorsal setae on head, thorax, and abdominal dorsum. The siphunculus is also unusually swollen and has 4-7 rows of polygonal cells in its subapical zone. The new species shares with E. avariolosa (David, Rajasingh & Narayanan, 1971), E. leclanti Remaudière, 1971, and E. wakibae (Hottes, 1934) some features of the siphunculus (e.g. slightly swollen with row(s) of polygonal cells in the subapical zone) but differs in the other above-mentioned characters.

Type material.

Holotype: UNITED STATES OF AMERICA, California: Calaveras Co., Board’s Crossing, Stanislaus N. F. (38°18'13"N; 120°14'54"W, 1180 m a.s.l.), 15 April 2014, on Chamaebatia foliolosa , A. Jensen leg., 1 apterous viviparous female marked as holotype ( “H”) and circle on the slide, AJ7029, USNM. Paratypes: the same data as the holotype, 2 apterous viviparous females, AJ7029, AJ; 3 apterous viviparous females, AJ7032, AJ; 4 apterous viviparous females, AJ7030, AJ; Sheep Ranch Rd. near Avery (38°12'02"N; 120°23'52"W, 1086 m a.s.l.), 15 April 2014, on Ch. foliolosa , A. Jensen leg., 2 apterous viviparous females, AJ7019; Placer Co., 3 mi. S.W. Dutch Flat HWY 80 (39°11'14"N; 120°50'47"W, 972 m a.s.l.), 22 April 1978, on Ch. foliolosa , D. Hille Ris Lambers no 33 leg., 1 apterous viviparous female, BM 1984-340, BMNH; near Dutch Flat (39°11'14"N; 120°50'47"W, 972 m a.s.l.), 22 April 1978, on Ch. foliolosa , D. Hille Ris Lambers no 31 leg., 3 apterous viviparous females, BM 1984-340 (1 - present marking), DZUS; 3 mi. S.W. Dutch Flat HWY 80 (39°11'14"N; 120°50'47"W, 972 m a.s.l.), 23 May 1978, on Ch. foliolosa , D. Hille Ris Lambers (culture) leg., 2, 1, 2, 2, 2, 2, 2, 2, 2, 2 alate viviparous females (11 slides with the same data and number), BM 1984-340, BMNH; 3 alate viviparous females BM 1984-340, DZUS; El Dorado Co., Sand Mtn. Blodgett (38°54'22"N; 120°39'30"W, 1349 m a.s.l.), 21 August 1974, on Ch. foliolosa , D. Voegtlin leg., 2, 2, 2, 2, 2, 2, 2, 2, 2 apterous viviparous females (9 slides with the same data and number), BM 1984-340, BMNH; 2 apterous viviparous females, BM 1984-340, ISU; Sand Mtn. Blodgett (38°54'22"N; 120°39'30"W, 1349 m a.s.l.), 21 August 1974, on Ch. foliolosa , D. Voegtlin leg., 2 alate viviparous females, BM 1984-340, ISU; Sand Mtn. Blodgett (38°54'22"N; 120°39'30"W, 1349 m a.s.l.), 21 August 1974, on Ch. foliolosa , D. Voegtlin leg.

Description.

Apterous viviparous female (n = 34). Colour in life: dark green. On slide: body in general sclerotised, pale yellow to yellow. ANT yellow with brown distal part of ANT IV and whole ANT V–VI. Tibiae yellow with brown to dark brown distal parts (but the very apex of tibiae lighter). Tarsi light brown to brown. SIPH pale to yellow basally and brown to dark brown distally (Figure 1a).

Slide–mounted specimens: HW 0.23-0.36 × ANT. Head chaetotaxy: head with three dorsal pairs of setae; median tubercle with 4-5, ANT tubercles each with 3-5 long, rigid, thick setae with blunt or narrow capitate apices, 0.017-0.052 mm long. Frontal setae 0.037-0.050 mm long (Figure 2a). ANT 0.70-1.04 × BL. ANT III without secondary rhinaria, ANT IV slightly shorter or slightly longer than ANT V. ANT V with ciliated primary rhinarium at the distal part. PT 3.00-3.54 × BASE. Other antennal ratios: VI:III 1.31-1.87, V:III 0.67-0.78, IV:III 0.66-0.81, PT:III 1.02-1.45, PT:IV 1.30-1.93, PT:V 1.30-1.93. ANT chaetotaxy: ANT bearing very short and rigid setae with blunt apices. ANT III setae shorter than the width of the segment, 0.007-0.020 mm long, LS III 0.41-0.90 × BD III. ANT I with 7-10, ANT II with 4-5, ANT III with 11-17, ANT IV with 7-16, ANT V with 7-12 setae. ANT VI with 3-5 basal, 3 apical and 5-6 setae on the PT. Rostrum reaching from metasternum to ABD I. URS 0.36-0.60 × ANT III, 0.35-0.47 × PT, 1.20-1.50 × BASE and 1.66-1.87 × HT II with 11-19 fine and pointed accessory setae (Figure 2b). Mesosternal furca fused, wide, Y–shaped. III FEMORA bearing short, thick, rigid setae with ragged or pointed apices, 0.010-0.035 mm long. III TIBIAE bearing thick, rigid setae with ragged or flat apices, shorter than the width of tibiae, 0.007-0.041 mm long (Figure 2c). HT I with 3 –3– 3 ventral setae, HT II 0.21-0.35 × ANT III, 0.20-0.27 × PT and 0.70-0.82 × BASE. SIPH tubular, slightly curved, swollen from about mid–length with distinct zone of subapical reticulation formed from 4-7 rows (Figure 2d). The reticulated zone 0.07-0.16 × SIPH. SIPH 2.08-2.76 × cauda, 0.18-0.32 × BL, and 1.24-1.60 × ANT III. Abdomen sclerotised with long and thick setae in spinal, pleural and marginal positions. Dorsal setae with capitate apices, 0.015-0.047 mm long on ABD I–V and 0.040-0.065 mm long on ABD VI–VIII (Figure 2e). ABD VII with 0-2 and ABD VIII with 1-2 spinal tubercles (Figures 3 a–d). Marginal tubercles on ABD II–VII, sometimes poorly–visible (Figure 3e). ABD VIII usually with 4-5 setae. Genital plate with two anterior setae which are longer than the others, 6-12 setae in the middle and 9-12 posterior setae. Cauda 1.30-2.00 × its width at base and 0.09-0.12 × BL, with 5-7 long and fine setae (Figure 2f).

Alate viviparous female (n=22). Colour in life: unknown. On slide: head and ANT light brown to brown with basal part of Ant III and PT lighter. Pronotum light brown, rest of thorax brown. Wings hyaline with light brown veins (cubital veins slightly darker). Femora brown with pale proximal part and dark distal part. Tibiae yellow to light brown with brown to dark distal part. Abdomen with brown sclerotisation, SIPH brown with lighter apical part, cauda brown (Figure 1b).

Slide–mounted specimens: HW 0.18-0.21 × ANT. Head chaetotaxy: head with four dorsal pairs of long, rigid, thick setae with capitate apices, 0.022-0.050 mm long. Frons with four setae, ANT tubercles with 2-4 setae (Figure 4a). ANT 1.01-1.12 × BL. ANT III with 6-9 secondary rhinaria (Figures 4b, c), ANT IV longer than ANT V without secondary rhinaria. ANT V with primary rhinarium with ciliated rim. PT 3.60-4.66 × BASE. Other antennal ratios: VI:III 1.43-1.74, V:III 0.72-0.87, IV:III 0.81-1.02, PT:III 1.12-1.43, PT:IV 1.25-1.53, PT:V 1.27-1.75. ANT chaetotaxy: ANT with short and rigid setae with blunt apices. ANT III setae shorter than the width of the segment, 0.015-0.017 mm. LS III 0.68-0.87 × BD III. ANT I with 7-11, ANT II with 4-5, ANT III with 14-20, ANT IV with 12-16, ANT V with 9-12 setae. ANT VI with 3-4 basal, 3-4 apical and 5-8 additional setae on the PT. Rostrum reaching mesosternum. URS 0.31-0.38 × ANT III, 0.25-0.30 × PT, 1.03-1.16 × BASE and 1.58-1.88 × HT II with 15-18 fine and pointed accessory setae. III FEMORA bearing thick, rigid setae with pointed or blunt apices, 0.015-0.027 mm long. III TIBIAE bearing long, slightly rigid, pointed or blunt setae, shorter or longer than the width of tibiae, 0.012-0.045 mm long. HT II (Figure 4d) 0.18-0.21 × ANT III, 0.14-0.18 × PT and 0.56-0.70 × BASE. SIPH 2.67-3.06 × cauda and 0.23-0.27 × BL. Abdomen with two crossbars on ABD I and II and a large spino–pleural sclerotic patch on ABD III–VIII and pleuro–marginal sclerites on ABD V–VII (Figure 4e). Dorsal setae long, thick, and rigid with pointed or slightly blunt apices, 0.017-0.049 mm long on ABD I–VI and 0.037-0.067 mm long on ABD VII–VIII. ABD VII and VIII with spinal tubercles (Figure 4f). ABD VIII with 4-5 setae. Subgenital plate with 19-23 setae. Cauda length 1.41-1.51 × width at base, with 5-6 setae.

Etymology.

The authors have the pleasure in naming the new species to honour Dr. David Voegtlin, an aphid specialist from the Illinois Natural History Survey (University of Illinois, Urbana–Champaign, USA), who was also the first collector.

Biology and distribution.

The new aphid species is associated with Chamaebatia foliolosa Benth. ( Rosaceae ). Its sexual morphs and life history are unknown, but probably it is monoecious holocyclic. The aphid species is presumably endemic to California, as is its host plant.