Cecidophyes truncatis, Xue & Song & Hong, 2011

Xue, Xiao-Feng, Song, Zi-Wei & Hong, Xiao-Yue, 2011, Three new species of Cecidophyinae (Acari: Eriophyidae) from China, Journal of Natural History 45 (19 - 20), pp. 1199-1211 : 1200-1204

Cecidophyes truncatis sp. nov.

( Figures 1–3 )

Female

Body fusiform, 215 (200–223), 70 (70 – 72) wide, 68 (65–68) thick; light yellow. Gnathosoma 26 (26 – 27), projecting obliquely down, pedipalp coxal seta (ep) 3 (2–3), dorsal pedipalp genual seta (d) 6 (5–6), cheliceral stylets 23 (22–23). Prodorsal shield 44 (44–46), 37 (36–39) wide; anterior shield lobe broad; median, admedian and submedian lines complete and connected by lines at basal two-fifths and three-fifths, with many granules on lines. Scapular tubercles and setae (sc) absent. Coxal plates with curved lines, anterolateral setae on coxisternum I (1b) 6 (6–7), 12 (12–13) apart, proximal setae on coxisternum I (1a) 15 (15–16), 12 (11–12) apart, proximal setae on coxisternum II (2a) 42 (40–43), 27 (26–27) apart. Prosternal apodeme 3 (3–4). Legs with usual series of setae. Leg I 32 (32–34), femur 8 (8–9), basiventral femoral seta (bv) 14 (13–14); genu 5 (4–5), antaxial genual seta (l ́́) 32 (30–33); tibia 7 (7–8), paraxial tibial seta (ĺ) 7 (6–7), located one-third from dorsal base; tarsus 7 (6–7), paraxial, fastigial, tarsal seta ft́ 17 (17–18), antaxial, fastigial, tarsal seta ft ́́ 18 (17–18), paraxial, unguinal, tarsal seta ú 5 (4–5); tarsal empodium (em) 5 (5–6), simple, four-rayed, tarsal solenidion (ω) 6 (5–6), knobbed. Leg II 29 (29–32), femur 8 (8–9), basiventral femoral seta (bv) 14 (13–14); genu 4 (4–5), antaxial genual seta (l ́́) 6 (5–6); tibia 6 (5–6); tarsus 6 (5–6), paraxial, fastigial, tarsal seta ft́ 6 (5–6), antaxial, fastigial, tarsal seta ft ́́ 21 (20–22), paraxial, unguinal, tarsal seta ú 4 (4–5); tarsal empodium (em) 5 (5–6), simple, four-rayed, tarsal solenidion (ω) 6 (5–6), knobbed. Opisthosoma: opisthosoma dorsally with 66 (66–70) annuli, with round microtubercles on rear annular margin, ventrally with 70 (68–73) annuli, with round microtubercles on rear annular margin. Setae c2 11 (11–13) on ventral annulus 11 (11–13), 67 (65–67) apart; setae d 72 (70–76) on ventral annulus 22 (22–23), 45 (44–45) apart; setae e 9 (8–9) on ventral annulus 38 (38–41), 28 (26–28) apart, setae f 26 (25–27) on eighth ventral annulus from rear, 24 (22–24) apart. Setae h1 absent, h2 72 (70–81). Female genitalia 17 (16–17), 27 (26–28) wide, coverflap with two rows of ridges, the upper one with 12 longitudinal ridges, the other with 10 longitudinal ridges, proximal setae on coxisternum III (3a) 13 (13–14), 21 (20–21) apart.

Male

Body fusiform, 180–193, 68 – 69 wide; light yellow. Gnathosoma 22 – 23, projecting obliquely down, pedipalp coxal seta (ep) 2–3, dorsal pedipalp genual seta (d) 5–6, cheliceral stylets 20–21. Prodorsal shield 37–38, 32–33 wide; anterior shield lobe broad; median, admedian and submedian lines complete and connected by lines at basal twofifths and three-fifths, with many granules on lines. Scapular tubercles and setae (sc) absent. Coxal plates with curved lines, anterolateral setae on coxisternum I (1b) 7–8, 10–11 apart, proximal setae on coxisternum I (1a) 12–13, 10–11 apart, proximal setae on coxisternum II (2a) 35–36, 23–24 apart. Prosternal apodeme 3–4. Legs with usual series of setae. Leg I 30–31, femur 7–8, basiventral femoral seta (bv) 13–14; genu 4–5, antaxial genual seta (l ́́) 25–27; tibia 7–8, paraxial tibial seta (ĺ) 6–7, located onethird from dorsal base; tarsus 5–6, paraxial, fastigial, tarsal seta ft́ 12–13, antaxial, fastigial, tarsal seta ft ́́ 15–16, paraxial, unguinal, tarsal seta ú 4–5; tarsal empodium (em) 4–5, simple, four-rayed, tarsal solenidion (ω) 5–6, knobbed. Leg II 27–28, femur 8–9, basiventral femoral seta (bv) 12–13; genu 4–5, antaxial genual seta (l ́́) 5–7; tibia 5–6; tarsus 5–6, paraxial, fastigial, tarsal seta ft́ 4–5, antaxial, fastigial, tarsal seta ft ́́ 18–19, paraxial, unguinal, tarsal seta ú 4–5; tarsal empodium (em) 5–6, simple, fourrayed, tarsal solenidion (ω) 5–6, knobbed. Opisthosoma dorsally with 55–57 annuli, with round microtubercles on rear annular margin, ventrally with 57–59 annuli, with round microtubercles on rear annular margin. Setae c2 15–17 on ventral annulus 15–16, 60–61 apart; setae d 50–51 on ventral annulus 28–29, 37–38 apart; setae e 8–9 on ventral annulus 48–49, 22–23 apart, setae f 22–23 on eighth ventral annulus from rear, 20–21 apart. Setae h1 absent, h2 65–71. Female genitalia 20–21 wide, proximal setae on coxisternum III (3a) 11–12, 16–17 apart.

Type material

Holotype, female (slide number NJAUAcariEri11, marked Holotype), from Acer truncatum Bunge (Aceraceae) , Taishan Mountain, Tai’an City, Shadong Province, China, 36 ◦15́17 ́́ N, 117 ◦ 06́15́́ E, 17 August 2003, coll. Xiao-Feng Xue and Xiao-Yue Hong. Paratypes, 15 females and 3 males (slide number NJAUAcariEri11), with the same data as holotype; 10 females (slide number NJAUAcariEri184), from Acer truncatum Bunge (Aceraceae) , Baotianman, Neixiang County, Henan Province, China, 33 ◦31́00 ́́ N, 111 ◦ 55́85́́ E, elevation 1382 m, 25 July 2004, coll. Xiao-Feng Xue.

Relation to host

Vagrant on leaf surface. No damage to the host was observed.

Etymology

The specific designation truncatis is from the species name of host plant, truncatum .

Differential diagnosis

This species is similar to C. naulti Styer, 1975 (from Acer rubrum ), but can be differentiated from the latter by median, admedian and submedian lines connected by lines at basal two-fifths and three-fifths (median and admedian lines connected at basal onefifth in C. naulti ), empodium four-rayed (empodium five-rayed in C. naulti ), coverflap with 12 longitudinal ridges above and 10 longitudinal ridges below (coverflap with 18 longitudinal ridges above and 15 longitudinal ridges below in C. naulti ).

Figures

Figure 1. Cecidophyes truncatis sp. nov. D, dorsal view of female; LO, lateral microtubercles.

Figure 2. Cecidophyes truncatis sp. nov. LM, lateral view of female; L1, leg I; L2, leg II; em, empodium.

Figure 3. Cecidophyes truncatis sp. nov. CG, coxae and female genitalia; CGM, coxae and male genitalia.