Neoseiulella glenfieldensis (Schicha), 1986

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 : 290

Neoseiulella glenfieldensis (Schicha)

( Figure 13 )

Typhlodromus glenfieldensis Schicha 1980: 18 ; Schicha, 1987: 140-142; Chant and Yoshida-Shaul 1989: 1034-1037. Neoseiulella glenfieldensis (Schicha) Moraes et al. 1986: 201 ; Moraes et al. 2004: 294; Chant and McMurtry 2007: 147.

Adult female ( Figure 13a – e )

Dorsal shield ( Figure 13a ) — Dorsal shield smooth: length 418 (415 – 421); width 231 (230 – 232) (at level of s4), 240 (238 – 242) (at level of Z1), with five pairs of solenostomes: gd2, gd4, gd5, gd6, and gd9. Four pairs of poroids. Sub – lateral setae (r3 and R1) on the lateral margin. Dorsal shield bearing 19 pairs of setae, all smooth, except Z5 which is slightly serrated: j1 35 (34 – 36); j3 40; j4 11; j5 14 (13 – 14); j6 15 (14 – 16); J2 18 (17 – 18); J5 12 (11 – 12); z2 16; z3 25 (23 – 26); z4 21 (20 – 21); z5 14 (13 – 14); Z1 16 (15 – 16); Z4 52 (50 – 53); Z5 171 (166 – 176); s4 28 (27 – 28); s6 19; S2 22 (21 – 23); S4 18; S5 20 (19 – 20); sub – lateral setae r3 19 and R1 18 (17 – 18). Presence of few visible muscles marks (sigilles) on the dorsal shield. Peritreme extending anteriorly to the level of j1 .

Ventral shields ( Figure 13b ) — Sternal shield 93 (91 – 95) long and 92 (91 – 93) wide (at level of ST2), smooth with three pairs of setae (ST1, ST2 and ST3) and two pairs of poroids. A pair of metasternal setae (ST4) on separate platelets accompanied by a pair of small poroids. Genital shield 141 (140 – 141) long and 83 (82 – 83) wide (at level of ST5), smooth. Four elongate platelets or genital sigilla separating genital and ventrianal shields folded under the genital shield. One pair of poroids close to the genital shield (ST 5) and 4 pairs of poroids around the genital shield. Ventrianal shield longer than wide, 133 (132 – 133) long and 112 (111 – 112) wide (at level of ZV2), smooth, with three pairs of preanal setae (JV1, JV2 and ZV2; JV3 absent), and a pair of small circular solenostomes gv3. Four pairs of caudoventral setae (ZV1, ZV3, JV4 and JV5) on the integument surrounding the ventrianal shield. JV5 50 (49 – 50) long, smooth. Primary metapodal plate or inguinal sigillum 23 (22 – 23) long and 7 wide.

Spermatheca ( Figure 13c ) — Cervix 5 long, cupshaped.

Chelicera ( Figure 13d ) — Twelve teeth and a pilus dentilis on the fixed digit. The movable digit, 40 (39 – 40) long, bearing three teeth.

Legs ( Figure 13e ) — Measurements of legs: leg I 391 (387 – 395); leg II 371 (368 – 374); leg III 349 (344 – 354); leg IV 462 (460 – 463). Seven setae (2-2/0, 2/0-1) on the genu II. Two macrosetae 39 (37 – 40) and 32 (31 – 32) long, on genu and tibia III, respectively. Three other macrosetae, 72 (69 – 75), 68 (66 – 69), 54 (53 – 55) long, on genu, tibia and basitarsus IV, respectively.

Material examined — The female holotype and one female paratype deposited in NSW Department of Primary Industries , Agricultural Scientific Collections Unit (Acarology), Orange Agricultural Institute, Australia .

Adult male

Described by Schicha (1980). We were not able to borrow the male type specimen of this species.

Previous reports — N. glenfieldensis is only known from Australia (New South Wales). Plants on which this species was collected are: Citrus sp. ( Rutaceae ); Malus domestica Borkh (Rosaceae) and Quercus sp. ( Fagaceae ).

The present examination of the type materials of N. manukae and N. glenfieldensis shows two main differences. The first one concerns the dentition of the fixed digit (11 teeth in N. manukae ; 12-13 teeth in N. glenfieldensis ). However, Schicha (1980) mentioned that N. glenfieldensis has 11-13 teeth on the fixed digit; we do not thus consider this difference to be significant. The second difference relates to the length of the seta Z5 (Z5 134 on N. manukae ; Z5 171 on N. glenfieldensis ). Even if this difference is quite high, high intraspecific vatiations have been previously observed for idiosomal seta lengths in the family Phytoseiidae ( Tixier et al. 2003, 2008). Furthermore, it would be the unique diagnostic characters to separate these two species. We thus propose that N. manukae is a senior synonym of N. glenfieldensis , in accordance with the conclusions of Denmark and Rather (1996), but not with those of Schicha (1980) and Chant and Yoshida-Shaul (1989). However, an examination of other female paratype specimens of both species and/or molecular studies would be useful to determine the reliability of the length of Z5 for species diagnosis.

Figures

FIGURE 13: Neoseiulella glenfieldensis (Schicha). Female (holotype): a – dorsal shield; b – ventral shields; c – spermatheca; d – chelicera; e – leg IV.