Neoseiulella aceri (Collyer), 2004

Kanouh, M., Kreiter, S., Douin, M. & Tixier, M. - S., 2012, Revision Of The Genus Neoseiulella Muma (Acari: Phytoseiidae). Re-Description Of Species, Synonymy Assessment, Biogeography, Plant Supports And Key To Adult Females, Acarologia 52 (3), pp. 259-348 : 269-271

Neoseiulella aceri (Collyer)

( Figure 2 )

Typhlodromus aceri Collyer 1957: 199-200 ; Chant 1958: 626; Hirschmann 1962: 12; Livshitz and Kuznetsov 1972: 20; Chant and Yoshida-Shaul 1989: 1013. Typhlodromus (Typhlodromus) aceri (Collyer) Chant 1959: 65 ; Westerboer and Bernhard 1963: 565- 568. Typhloctonus aceri (Collyer) Muma 1961: 299 ; Denmark and Rather 1984: 166-167; Kolodochka 1986: 30-31; Moraes et al. 1986: 232; Kolodochka 2009: 486-487. Typhlodromus (Nesbitteius) aceri (Collyer) Wainstein 1962: 23 . Seiulus aceri (Collyer) Abbasova 1972: 22 ; Karg and Edland 1987: 387; Steeghs et al. 1993: 24. Seiulus (Typhloctonus) aceri (Collyer) Beglyarov 1981: 19 . Neoseiulella (Typhloctona) aceri (Collyer) Denmark and Rather 1996: 60. Neoseiulella aceri (Collyer) Moraes et al. 2004: 290 ; Chant and McMurtry 2007: 147.

Adult female ( Figure 2a – d )

Dorsal shield ( Figure 2a ) — Dorsal shield distinctly reticulated throughout: length 318 (312 – 326), width 170 (166 – 174) (at level of s4) and 201 (198 – 207) (at level of Z1). Five pairs of small solenostomes on the dorsal shield: gd1, gd2, gd6, gd8, and gd9. No poroid visible. Sub-lateral setae (r3 and R1) on the lateral margin. Dorsal shield bearing 19 pairs of setae, all serrated: j1 16 (15 – 17); j3 26 (25 – 26); j4 18 (17 – 18); j5 18 (17 – 18); j6 24 (23 – 25); J2 31 (30 – 31); J5 14 (13 – 14); z2 21 (20 – 22); z3 26; z4 27; z5 16 (15 – 16); Z1 30 (28 – 31); Z4 35; Z5 38 (37 – 39); s4 31; s6 31 (30 – 31); S2 31; S4 26 (25 – 26); S5 14 (13 – 15); sub-lateral setae r3 21 (20 – 21) and R1 20. A pair of dorsal setae J1 (32) on one of the syntype females examined. Peritreme extending anteriorly to the level of j3 or between z2-j3 .

Ventral shields ( Figure 2b ) — Sternal shield 37 (34 – 40) long and 53 (51 – 58) wide (at level of ST2), is smooth with three pairs of setae (ST1, ST2 and ST3) and two pairs of poroids (posterior to ST1; anterior to ST3). The pair of sternal setae ST3 on an elongate projection of the sternal shield. A pair of metasternal setae (ST4) on separate platelets with a pair of small poroids. Genital shield 126 (118 – 132) long and 60 (58 – 61) wide (at level of ST5), smooth. Four elongate platelets or genital sigilla between genital and ventrianal shields. One pair of poroids close to the genital shield (ST 5) and 4 pairs of poroids around the genital shield. Ventrianal shield subquadrate-shaped, 99 (96 – 101) long and 83 (82 – 86) wide (at level of ZV2), distinctly reticulated, with four pairs of preanal setae (JV1, JV2, JV3 and ZV2) and a pair of solenostomes gv3 posterior to JV3. Four pairs of caudoventral setae (ZV1, ZV3, JV4 and JV5) on the integument surrounding the ventrianal shield. JV5 14 (13 – 14) long, smooth. Primary metapodal plate or inguinal sigillum 30 (26 – 31) long and 3 (2 – 4) wide.

Spermatheca ( Figure 2c ) — Cervix 4 (3 – 5) long, cup-shaped, with an enlarged atrium.

Chelicera ( Figure 2d ) — Two teeth and a pilus dentilis on the fixed digit. Movable digit 22 (20 – 23) long, edentate. Legs. Measurements of legs: leg I 225 (210 – 231); leg II 204 (190 – 222); leg III 212 (190 – 225); leg IV 249 (233 – 270). Seven setae (2-2/0, 2/0-1) on the genu II. No macroseta on legs. Material examined. Four female syntypes deposited in the British Museum of Natural History = BMNH, Cromwell Road, London, UK .

Adult male ( Figure 2e, f )

Described by Collyer (1957), Chant (1958) and Denmark and Rather (1984, 1996). Dorsal shield chaetotaxy similar to the female. Ventrianal shield 97 long and 138 wide, distinctly reticulated and with five pairs of preanal setae and three pairs of poroids. Spermatodactyl with a terminal foot, and with a non-enlarged toe. This description is based on one male syntype.

Previous reports — N. aceri is only known from the West-Palaearctic and Nearctic areas. However, its occurrence in the Nearctic area (three records) might be due to an introduction. Countries from which this species is reported are: Azerbaijan ( Abbasova 1972); Belgium ( AndrØ 1986); Croatia ( Tixier et al. 2010); Czech Republic ( Kabicek 2003; Kabicek and Rehakova 2004; Kabicek 2005, 2010;); England ( Collyer 1957); Finland ( Tuovinen and Rokx 1991; Tuovinen 1993); France ( Chant and Yoshida-Shaul 1989); Germany ( Balder et al. 1999); Hungary ( Szabo 1980; Ripka 1998, 2006); Italy ( Ragusa and Paoletti 1985; Duso et al. 1993, 2004); Moldova ( Beglyarov and Malov 1977); Norway ( Karg and Edland 1987); Sweden (Steephs et al. 1993); Turkey ( Cobanoglu 1996, 2000); Ukraine ( Livshitz and Kuznetsov 1972; Akimov et al. 2007; Kolodochka and Omeri 2007; Kolodochka 2009); USA ( Chant 1959 b; Chant and Yoshida-Shaul 1989; Congdon 2002).

Neoseiulella aceri was collected from a wide range of plant supports: Acer campestre L., A. macrophyllum Pursh , A. platanoides L., A. pseudoplatanus L., Acer sp. ( Aceraceae ); Aesculus hippocastanum L. ( Hippocastanaceae ); Alnus incana (L.) Moench, Carpinus betulus L., Corylus avellana L. ( Betulaceae ); Juglans regia L. ( Juglandaceae ); Juniperus sabina L. ( Cupressaceae ); Morus alba L. ( Moraceae ); Prunus ( Cerasus ) sp., Prunus armeniaca L., Prunus sp., Rubus sp. ( Rosaceae ); Quercus ilex L. ( Fagaceae ); Trifolium pratense L. ( Fabaceae ); Zelkova sp. ( Ulmaceae ).

Figures

FIGURE 2: Neoseiulella aceri (Collyer). Female (syntype): a – dorsal shield; b – ventral shields; c – spermatheca; d – chelicera. Male (syntype): e – ventrianal shield; f – spermatodactyl.