Aphis (Aphis) confusa Walker, 1849

Kanturski, Mariusz & Bezděk, Aleš, 2019, The Knautia feeding species of Aphis (Insecta: Hemiptera: Aphididae) with notes on Aphis knautiae Holman nomen nudum, Bonn zoological Bulletin 68 (2), pp. 189-203 : 191-197

publication ID	https://doi.org/10.20363/BZB-2019.68.2.189
publication LSID	lsid:zoobank.org:pub:7EF7A263-F535-43F7-B6E5-94012D1CE048
persistent identifier	https://treatment.plazi.org/id/03A687E8-FFD5-FFF0-FF61-F613C3C9FAEB
treatment provided by	Felipe
scientific name	Aphis (Aphis) confusa Walker, 1849
status

Treatment

Aphis (Aphis) confusa Walker, 1849 View in CoL

Walker, 1849: XLV

Figs 1–7 View Fig View Fig View Fig View Fig View Fig View Fig View Fig ; Supplementary tables 1–4; Tables 1–2

Apterous viviparous female (n=27).

Colour in life: apterae are pale yellow, yellowish green, green or dark green, depending on location on host ( Blackman & Eastop 2019); pigmentation on slide: head sclerotized, brown. Antennae light brown with lighter ANT and basal part of ANT IV or ANT III, and basal part of ANT IV and V. Legs yellow to pale brown with brown distal parts of tibiae and tarsi (sometimes only slightly visible). Abdomen yellow with brown to dark brown SIPH and light brown cauda and anal plate ( Fig. 1a View Fig ).

HW 0.36–0.40 × ANT. Head setae 0.015 –0.025 mm long, 0.75–0.90 × BD III. ANT 0.51–0.58 × BL. ANT IV slightly shorter, as long as or slightly longer than ANT V. ANT VI with PT 2.45–3.00 × BASE. Other antennal ra- tios: VI:III 1.28–1.52, V:III 0.56–0.69, IV:III 0.56–0.76, PT:III 0.87–0.91, PT:IV 1.42–1.71, PT:V 1.55–1.80. ANT bearing very short and blunt setae ( Fig. 5a View Fig ). ANT III setae shorter than the width of the segment, 0.010 – 0.015 mm long, LS III 0.50–0.75 × BD III. ANT I with 4–5, ANT II with 3–5, ANT III with 4–9, ANT IV with 2–4, ANT V with 2–5, ANT VI with 2–3 basal setae. Rostrum reaching hind coxae. URS 0.37–0.50 × ANT III, 0.27–0.34 × ANT VI, 0.37–0.46 × PT, 1.09–1.37 × BASE and 1.00–1.22 × HT II. Mesosternal furca wide, fused basally. III FEMORA bearing long, slightly rigid setae with blunt or slightly expanded apices ( Fig. 5b View Fig ), 0.015 –0.032 mm long, III FEMORA LS 0.63–0.76 × trochantero-femoral suture length. Posterior seta on hind trochanter 0.76–1.00 × trochantero-femoral suture length ( Fig. 5c View Fig ). III TIBIAE bearing long and rigid setae with slightly blunt apices, 0.017 –0.030 mm long. HT II 0.37–0.44 × ANT III, 0.27–0.30 × ANT VI, 0.37–0.42 × PT and 1.00–1.12 × BASE. Abdomen with very small MTu on ABD IV. SIPH 1.60–1.88 × cauda, 0.13–0.18 × BL, and 1.09–1.30 × ANT III. Setae on ABD I–V 0.015 – 0.020 mm long, about 0.85 × BD III. Setae on ABD VI– VIII 0.017 –0.025 mm long, 0.85–1.13 × BD III. Genital plate anterior setae 0.035 –0.042 mm long, 1.75–2.00 × BD III. Cauda with 5–8 setae ( Fig. 6a, b View Fig ).

Alate viviparous female (n=4).

Colour in life: unknown; pigmentation on slide: head and thorax sclerotized, brown to dark brown. Antennae brown to light brown with paler basal half of ANT III, IV and V. Wings light brown with darker venation. Fore

and middle femora uniformly yellow to light brown, hind femora yellow to light brown with darker distal half. Tibiae yellow to light brown with brown distal ends and tarsi. Abdomen pale with brown sclerite, plates, SIPH, cau- da and anal plate ( Fig. 2a View Fig ). HW 0.34–0.36 × ANT. Head setae 0.012 –0.015 mm long, 0.76–0.88 × BD III. ANT 0.62–0.67 × BL. ANT III with 4–5 secondary rhinaria, ANT IV slightly shorter or slightly longer than ANT V. ANT VI with PT 2.28–2.90 × BASE. Other antennal ra- tios: VI:III 1.32–1.70, V:III 0.57–0.77, IV:III 0.62–0.69, PT:III 0.92–1.20, PT:IV 1.33–1.93, PT:V 1.55–1.70. ANT bearing very short and blunt setae. ANT III setae shorter than the width of the segment, 0.010 –0.012 mm long, LS III 0.58–0.83 × BD III. ANT I with 4–5, ANT II with 4–5, ANT III with 5–7, ANT IV with 4–6, ANT V with 4–6, ANT VI with 2–3 basal setae. Rostrum reach- ing mesosternum. URS 0.42–0.45 × ANT III, 0.26–0.31 × ANT VI, 0.37–0.45 × PT, 0.90–1.10 × BASE and 1.10– 1.17 × HT II. III FEMORA bearing medium sized to long, slightly rigid setae with blunt apices, 0.017 –0.027 mm long, III FEMORA LS 0.59–0.67 × trochantero-femoral suture length. Posterior seta on hind trochanter 0.40–0.81 × trochantero-femoral suture length. III TIBIAE bearing long and rigid setae with blunt apices, 0.017 –0.027 mm long. HT II 0.38–0.39 × ANT III, 0.22–0.28 × ANT VI, 0.32–0.41 × PT and 0.77–0.95 × BASE. Abdomen with solid sclerotic bar on ABD I, small spinal and spinopleu- ral sclerites on ABD ABD II–V. ABD V without presi- phuncular sclerites. ABD VI with large spinal plate. ABD VII with small spinal plate ( Fig. 7a View Fig ). SIPH 1.50–1.61 × cauda, about 0.13 × BL, and 0.87–0.95 × ANT III. Setae on ABD I–V 0.010 –0.015 mm long, 0.66–0.88 × BD III. Setae on ABD VI–VIII 0.015 –0.020 mm long, 0.88–1.17 × BD III. Genital plate anterior setae 0.020 –0.040 mm long, 1.47–2.35 × BD III. Cauda with 5–7 setae.

Oviparous female (n=4).

Colour in life: unknown; pigmentation on slide: head slightly sclerotized, yellow to light brown. Antennae yel- low or pale with ANT I, ANT II, apical part of ANT V, BASE and PT light brown. Legs yellow with light brown distal parts of tibiae and tarsi. Hind tibiae uniformly light brown. Abdomen yellow with brown SIPH, cauda and anal plate ( Fig. 3a View Fig ). HW 0.47–0.50 × ANT. Head setae 0.010 –0.012 mm long, 0.58–0.62 × BD III. ANT about 0.48 × BL. ANT IV slightly shorter than ANT V. ANT VI with PT about 2.50 × BASE. Other antennal ratios: VI:III 2.00–2.33, V:III 0.85–0.91, IV:III 0.64–0.83, PT:III 1.42–1.66, PT:IV 2.20–2.22, PT:V 1.66–1.81. ANT bearing very short and blunt setae. ANT III setae shorter than the width of the segment, 0.007 –0.010 mm long, LS III 0.58–0.62 × BD III. ANT I with 5, ANT II with 3, ANT III with 5–6, ANT IV with 2, ANT V with 3–4, ANT VI with 2–3 basal setae. Rostrum reaching hind coxae. URS 0.67–0.83 × ANT III, 0.33–0.35 × ANT VI, 0.47–0.50 × PT, 1.18–1.25 × BASE and 1.18–1.33 × HT II. Mesosternal furca separated or slightly fused, wide. Posterior seta on hind trochanter 0.64–1.00 × trochantero-femoral suture length. III FEMORA with 60–89 pseudosensoria, bearing medium sized to long, slightly rigid setae with slightly blunt apices which are mostly pointed on the dorsal side, 0.010 –0.075 mm long, III FEMORA LS 0.59–0.77 × trochantero-femoral suture length. III TIBIAE with 60–89 mostly circular, different in size pseudosensoria and with long and rigid setae with blunt apices, 0.010 –0.030 mm long. HT II 0.57–0.62 × ANT III, 0.26–0.28 × ANT VI, 0.37–0.40 × PT and 0.93– 1.00 × BASE. Abdomen with small marginal tubercles on ABD I, V and VII. SIPH 1.23–1.28 × cauda, about 0.11 × BL, and 1.28–1.33 × ANT III. Setae on ABD I–V 0.010 –0.015 mm long, about 0.62–0.88 × BD III. Setae onABD VI–VIII 0.015 –0.025 mm long, 0.93–1.00 × BD III. Genital plate anterior setae 0.026 –0.035 mm long, 1.52–2.18 × BD III. Cauda with 6–7 setae.

Male (n=5). Colour in life: unknown; pigmentation on slide: head sclerotized, light brown. Antennae light brown with slightly paler basal part of ANT III. Legs with yellow or light brown femora and pale to yellow tibiae with brown distal parts and tarsi. Abdomen pale with light brown SIPH, cauda and genitalia ( Fig. 4a View Fig ). HW 0.39–0.40 ×

ANT. Head setae 0.010 –0.017 mm long, 0.50–0.76 × BD III. ANT 0.76–0.80 × BL. ANT III with 0 (on one segment)–14, ANT IV shorter, than ANT V with 2–12, ANT V with 1–11 secondary rhinaria. ANT VI with PT 2.64–2.73 × BASE. Other antennal ratios: VI:III 1.64– 1.77, V:III 0.76–0.80, IV:III 0.61–0.71, PT:III 1.20– 1.28, PT:IV 1.80–1.95, PT:V 1.57–1.60. ANT bearing very short and blunt setae. ANT III setae shorter than the width of the segment, about 0.010 mm long, LS III 0.50–0.76 × BD III. ANT I with 4–5, ANT II with 3, ANT III with 4–5, ANT IV with 3, ANT V with 1–3, ANT VI with 1–2 basal setae. Rostrum reaching from hind coxae to ABD I. URS 0.48–0.50 × ANT III, 0.27–0.30 × ANT VI, 0.37–0.41 × PT, 1.00–1.33 × BASE and 1.21–1.30 × HT II. Mesosternal furca separated. Posterior seta on hind trochanter 1.00–1.40 × trochantero-femoral suture length. III FEMORA bearing short to medium sized and rigid setae with mostly blunt apices which are pointed on the dorsal side, 0.015 –0.032 mm long, III FEMORA LS 0.78–0.80 × trochantero-femoral suture length. III TIBIAE bearing short to medium sized and rigid setae with blunt apices, 0.010 –0.025 mm long. HT II 0.38–0.40 × ANT III, 0.22–0.23 × ANT VI, aout 0.31 × PT and 0.82– 0.86 × BASE. Abdomen with small marginal tubercles on ABD IV. SIPH 1.00–1.22 × cauda, 0.09–0.11 × BL, and 0.57–0.64 × ANT III. Setae on ABD I–V 0.010 – 0.013 mm long, 0.50–0.76 × BD III. Setae on ABD VI– VIII 0.015 –0.030 mm long, 0.75–1.15 × BD III. Cauda with 4–6 setae.

Material examined. CZECH REPUBLIC: Český Krum- lov-Vyšné, 27 May 1987, on Knautia arvensis, J. Holman leg., 2 al, 19705, IECA ; Karlštejn , 10 October 1971, on K. arvensis, J. Holman leg., 4 ♀, 5 ♂, 13289, IECA ; FRANCE: Nevache (1600m), dépt. Hautes-Alpes, 25 June 1969, on K. arvensis, F. Leclant leg., 2 apt, L3120, IECA ; HUNGARY: Nagykovácsi : Nagyszénás, 17 June 1964, on Scabiosa sp. , H. Szelegiewicz leg., 6 apt, 2225, R344, ZMPA ; on S. ochroleuca, H. Szelegiewicz leg., 6 apt, 2782, R434, ZMPA ; POLAND: Ługwałd near Olsztyn, 27 June 1964, on K. arvensis, S. Huculak leg., 3 apt (per one on each slide), 189, R341, ZMPA ; Kaletnik near Suwałki, 09 July 1955, on K. arvensis, H. Szelegiewicz leg., 4 apt, 32 R348, 1 al, 32 R439, ZMPA ; SLO- VAKIA: Vrbovce , 20 May 1967, on K. arvensis, J. Holman leg., 4 apt, 10879 (apt. 33–36), IECA ; SWEDEN: Växjö, S. Åreda , 06 June 1981, R. Danielsson leg., 2 apt, 1 al, 5132: 24, IECA .

Host plants. Dipsacus sp. D . fullonum, Knautia arvensis , K. integrifolia , K. dinarica , K. dipsacifolia , K. longifolia , Scabiosa sp. , S. argentea , S. atropurpurea , S. canescens , S. columbaria , S. comosa , S. ochroleuca , S. sosnowskyi , S. pratensis ( Holman 2009)

Biology. This is a monoecious and holocyclic species with sexuales in September and October. The aphids occur on upper parts of stems and inflorescences or on un- dersides of leaves and at base of stems or on roots ( Heie 1986).

Distribution. Aphis confusa is a common and widely distributed species in Europe (except Balkans).