Aphis (Aphis) holmani, Kanturski & Bezděk, 2019

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 : 197-200

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-FFDF-FFF3-FF60-F256C052F8C6
treatment provided by	Felipe
scientific name	Aphis (Aphis) holmani
status	sp. nov.

Treatment

Aphis (Aphis) holmani View in CoL sp. nov.

Aphis knautiae Holman View in CoL in Holman & Pintera, 1981: 50 (nomen nudum)

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

Description

Apterous viviparous female (n=63).

Colour in life: unknown; pigmentation on slide: head slightly sclerotized, light brown. Antennae yellow or light yellow with ANT I and ANT II and light brown, apical part of ANT V and BASE and PT pale brown. Legs yellow with light brown distal parts of tibiae and tarsi. Abdomen yellow with light brown to brown SIPH, cau- da and anal plate ( Fig. 1b View Fig ). HW 0.36–0.45 × ANT. Head setae 0.015 –0.035 mm long, 0.83–1.25 × BD III. ANT 0.46–0.52 × BL in 5-segmented specimens and 0.60–0.62 × BL in 6-segmented specimens. In 6-segmented specimens ANT IV slightly shorter or as long as ANT V. ANT VI with PT 1.75–2.20 × BASE. Other antennal ratios: VI:III 0.86–1.33, V:III 0.45–0.62, IV:III 0.54–0.57 (in 6-segmented specimens), PT:III 0.55–0.91, PT:IV 1.26– 1.69, PT:V 1.16–1.57. ANT bearing very short and point- ed setae ( Fig. 5d View Fig ). ANT III setae shorter than the width of the segment, 0.010 –0.125 mm long, LS III 0.50–1.00 × BD III. ANT I with 4–6, ANT II with 3–5, ANT III with 5–11, ANT IV with 3–5, ANT V with 2–4, ANT VI with 1–2 basal and 4 apical setae. Rostrum reaching from hind coxae to ABD I. URS 0.36–0.54 × ANT III, 0.40– 0.43 × ANT VI, 0.59–0.66 × PT, 1.16–1.30 × BASE and 1.40–1.52 × HT II with 2–4 accessory setae. Mesosternal furca separated or slightly fused, wide. III FEMO- RA bearing long, fine, hair-like setae with pointed apices ( Fig. 5e View Fig ), 0.015 –0.050 mm long, III FEMORA LS 0.045 – 0.050 mm long, 0.90–1.11 × trochantero-femoral suture length. Posterior seta on hind trochanter, 1.00–1.22 × trochantero-femoral suture length ( Fig. 5f View Fig ). III TIBIAE bearing long setae with pointed apices, 0.010 –0.040 mm long. HT I with 3–3–2 ventral setae, HT II 0.26–0.35 × ANT III, 0.26–0.30 × ANT VI, 0.38–0.47 × PT and 0.83– 0.90 × BASE. Abdomen membranous, with well-devel- oped marginal tubercles on ABD I and ABD VII and sometimes small marginal tubercles on ABD IV. SIPH tubular, very slightly tapering towards apex, 1.05–1.50 × cauda, 0.09–0.14 × BL, and 0.59–0.91 × ANT III. Dor- sal setae very short and pointed, 0.015 –0.030 mm long, 0.83–1.25 × BD III on ABD I–V and 0.020 –0.055 mm long, 1.11–1.76 × BD III on ABD VI–VIII. Anterior setae on genital plate 0.045 –0.050 mm long, 2.25–2.94 × BD III. Cauda with 6–9 setae ( Fig. 6c, d View Fig ).

Alate viviparous female (n=5).

Colour in life: unknown; pigmentation on slide: head and thorax sclerotized, brown. ANT light brown with brown ANT I and ANT II and slightly paler basal half of ANT III–V. Fore and middle legs light brown with slight- ly darker distal parts of tibiae. Hind legs with brown femora with paler proximal parts and light brown tibiae with darker distal part of tibiae and tarsi. Wings with light brown pterostigma and veins. Abdomen pale with light brown sclerotization, brown SIPH and cauda ( Fig. 2b View Fig ). HW about 0.32 × ANT. Head setae 0.017 –0.027 mm long, 0.11–0.14 × BD III. ANT 0.65–0.76 × BL. ANT III with 4–6 secondary rhinaria. ANT IV as long as or slightly shorter, as long as than ANT V with 0–1 sec- ondary rhinaria. ANT VI with PT 2.40–2.47 × BASE. Other antennal ratios: VI:III 1.40–1.61, V:III 0.57–0.66, IV:III 0.51–0.61, PT:III 1.00–1.14, PT:IV 1.73–1.84, PT:V 1.71–1.73. ANT bearing very short and blunt se- tae. ANT III setae shorter than the width of the segment, 0.012 –0.015 mm long, LS III 0.80–1.00 × BD III. ANT I with 4–5, ANT II with 3–5, ANT III with 6–10, ANT IV with 3–6, ANT V with 4–6, ANT VI with 2 basal setae. Rostrum reaching from hind coxae to ABD I. URS 0.51– 0.59 × ANT III, about 0.36 × ANT VI, 0.51–0.52 × PT, 1.25–1.28 × BASE and 1.50–1.56 × HT II. III FEMORA bearing long, fine and pointed setae, 0.012 –0.032 mm long, III FEMORA LS 0.80–0.86 × trochantero-femoral suture length. Posterior seta on hind trochanter 0.80–1.00 × trochantero-femoral suture length. III TIBIAE bearing long, fine and pointed setae, 0.012 –0.032 mm long. HT II 0.34–0.38 × ANT III, 0.23–0.26 × ANT VI, 0.33–0.34 × PT and 0.80–1.00 × BASE. Abdomen with sclerite on ABD I, small spinal sclerites on ABD ABD II–IV. ABD V with solid or broken presiphuncular sclerites. ABD VI with large spinal plate. ABD VII with wide spino-pleural plate. ABD IV and VI with small MTu ( Fig. 7b View Fig ). SIPH 1.14–1.636 × cauda, 0.09–0.10 × BL, and about 0.57 × ANT III. Setae on ABD I–V 0.020 –0.025 mm long, about 1.33 × BD III. Setae on ABD VI–VIII 0.025 –0.040 mm long, about 1.66 × BD III. Genital plate anterior setae 0.030 –0.040 mm long, 2.00–2.66 × BD III. Cauda with 8 setae.

Oviparous female (n=47).

Colour in life: unknown; pigmentation on slide: head sclerotized, brown. Antennae pale with ANT I, ANT II, apical part of ANT V and ANT VI brown. Legs yellow with slightly darker very apical parts and tarsi. Abdomen yellow with brown SIPH, cauda and anal plate ( Fig. 3b View Fig ). HW 0.44–0.46 × ANT. Head setae 0.017 –0.040 mm long, 0.85–1.47 × BD III. ANT 0.51–0.56 × BL. ANT IV shorter than ANT V. ANT VI with PT 2.68–3.06 × BASE. Other antennal ratios: VI:III 2.00–2.18, V:III 0.87–0.92, IV:III 0.70–0.85, PT:III 1.48–1.51, PT:IV 1.86–2.09, PT:V 1.64–1.75. ANT bearing very short and pointed se- tae. ANT III setae shorter than the width of the segment, 0.011 –0.015 mm long, LS III 0.60–0.88 × BD III. ANT I with 4–5, ANT II with 4, ANT III with 3–4, ANT IV with 2–3, ANT V with 2–3, ANT VI with 2–3 basal setae. Rostrum reaching hind coxae. URS 0.70–0.81 × ANT III, 0.35–0.37 × ANT VI, 0.35–0.37 × PT, 1.37–1.43 × BASE and 1.22–1.43 × HT II. Mesosternal furca fused and wide. III FEMORA with 25–42 pseudosensoria, bearing long, fine and pointed setae, 0.015 –0.050 mm long, III FEMORA LS 0.84–1.00 × trochantero-femoral suture length. Posterior seta on hind trochanter 0.74–1.11 × trochantero-femoral suture length. III TIBIAE bearing long, fine and pointed setae, 0.017 –0.045 mm long. HT II 0.50–0.62 × ANT III, 0.24–0.29 × ANT VI, 0.32–0.39 × PT and 1.00–1.12 × BASE. SIPH 1.07–1.12 × cauda, 0.08–0.09 × BL, and 0.87–0.96 × ANT III. Setae on ABD I–V 0.022 –0.027 mm long, 1.10–1.29 × BD III. Setae on ABD VI–VIII 0.032 –0.075 mm long, 1.88–2.00 × BD III. Genital plate anterior setae 0.050 –0.055 mm long, 2.50–3.23 × BD III. Cauda with 6–10 setae.

Male (n=16). Colour in life: unknown: pigmentation on slide: head slightly sclerotized, brown. Antennae light rown to

brown with yellow ANT III, basal part of ANT IV and ANT V. Legs yellow with light brown very distal parts of tibiae and tarsi. Abdomen pale with light brown to brown SIPH, cauda and anal plate ( Fig. 4b View Fig ). HW 0.31–0.36 × ANT. Head setae 0.017 –0.025 mm long, 1.11–1.33 × BD III. ANT 0.87–1.06 × BL. ANT III with 10–16 secondary rhinaria. ANT IV as long as or slightly longer than ANT V with 12–18 secondary rhinaria. ANT V with 11–13 secondary rhinaria. ANT VI with PT 2.94–3.28 × BASE. Other antennal ratios: VI:III 1.76–1.86, V:III 0.82–0.83, IV:III 0.82–0.88, PT:III 1.35–1.38, PT:IV 1.56–1.64, PT:V 1.64–1.66. ANT bearing very short and pointed setae. ANT III setae shorter than the width of the seg- ment, 0.011 –0.012 mm long, LS III about 0.83 × BD III. ANT I with 4–5, ANT II with 4, ANT III with 4–5, ANT IV with 3, ANT V with 2–3, ANT VI with 2 basal setae. Rostrum reaching from hind coxae to ABD I. URS about 0.55 × ANT III, 0.29–0.31 × ANT VI, 0.40–0.41 × PT, 1.17–1.35 × BASE and 1.33–1.35 × HT II. III FEMORA bearing long, fine and pointed setae, 0.017 –0.040 mm long, III FEMORA LS 1.06–1.08 × trochantero-femoral suture length. Posterior seta on hind trochanter 1.00–1.06 × trochantero-femoral suture length. III TIBIAE bearing long, fine and pointed setae, 0.012 –0.032 mm long. HT II about 0.41 × ANT III, 0.22–0.23 × ANT VI, about 0.30 × PT and 0.88–1.00 × BASE. Abdomen with small marginal tubercles on ABD VI. SIPH 0.88–0.90 × cauda, 0.08–0.10 × BL, and 0.47–0.50 × ANT III. Setae on ABD I–V 0.022 –0.027 mm long, 1.46–1.80 × BD III. Setae on ABD VI–VIII 0.030 –0.052 mm long, 2.00–2.46 × BD III. Cauda with 5–6 setae.

Diagnosis

From so far known Aphis species feeding on Knautia , apterous viviparous females of A. holmani sp. nov. are most similar to A. confusa by hind femora and hind trochanter setae lengths (which are longer than 0.50 × trochantero-femoral suture length) and genital plate anteri- or setae lengths (which are longer than 1.00 × BD III). Both species differ from A. thomasi in those characters (0.20–0.50 × trochantero-femoral suture setae length and 0.20–0.50 × BD III respectively). The new species differ from A. confusa by:

• Pointed setae on femora, head and antennae (setae with blunt apices in A. confusa )

• longer anterior setae on the genital plate, 2.25–2.94 × BD III (1.00–2.00 in A. confusa )

• higher ratio of URS/HT II, 1.40–1.52 (1.00– 1.22 in A. confusa )

• lower ratio of PT/BASE, 1.75–2.20 (2.45–3.00 in A. confusa )

• lower ratio of SIPH/cauda, 1.05–1.50 (1.60–1.88 in A. confusa )

Detailed morphological differences between particular morphs of both species are given in Tables 1 and 2.

Etymology. The authors have the pleasure to give the name to honour the late Jaroslav Holman (1931–2014) – an outstanding European aphidologist and a long-time employee of the Biology Centre CAS in České Budějov- ice, Czech Republic.

Biology and distribution. The new aphid species is associated with Knautia drymeia Heuff. , from which it was collected in Central (the Czech Republic) and South-Eastern Europe ( Bulgaria and Romania). It is a holocyclic aphid with the sexual phase in September.

Material examined. HOLOTYPE: CZECH REPUB- LIC, Jihomoravský kraj, Pustý žleb, Moravský kras, 20 June 1967, on Knautia drymeia, J. Holman leg., 1 apt, 10838 B (apt. 8), IECA . PARATYPES: CZECH REPUB- LIC, the same data as in the holotype, 11 slides (1 apt on each slide), 10838 B (apt. 1–7, 9–12); Macocha , 19 May 1967, on K. drymeia, J. Holman leg., 1 apt, 10877 (apt. 1), 16 apt (two on each slide), 10877 (apt. 2–17), IECA , slide no apt.2 DZUS; Pustý žleb, 22 September 1970, on K. drymeia, J. Holman leg., 40 ♀ (four on each slide), 12885 (♀ 21–48, ♀ 61–68) 6 ♀, 10877 (73–78); 12 ♂ (four on each slide), 12885 (♂ 1–12), 1 ♀, 4 ♂ (♂ 13– 16, ♀ 49), IECA ; BULGARIA, Mt. Vitoša nr. Simeno- vo, 22 May 1990, on K. drymeia, J. Holman leg., 2 apt, 21725 A (apt. 1–2), 4 apt, 21725 (apt. 3–6), 16 apt (four on each slide), 21722 B (apt. 1–16), 2 al, 21722 B (al. 1–2), 3 al, 21722 B (al. 3–5), IECA ; ROMANIA, Băile Herculane jud. Caraş-Sev, 20 July 1976, on K. drymeia, J. Holman leg., 12 apt (six per each slide), 16309 (apt. 1–12), IECA .