Eriophyes spiraeae ( Nalepa, 1893 )

Kadono, Fujio, Takei, Madoka, Gotoh, Tetsuo, Kubota, Kenji, Hörweg, Christoph & Kagiwada, Satoshi, 2022, Supplementary descriptions of seven eriophyoid mite species (Acari: Eriophyoidea) recovered from the Viennese Nalepa collection and comparison with Japanese species, Acarologia 62 (2), pp. 273-301 : 282-284

Eriophyes spiraeae ( Nalepa, 1893)

Phytoptus spiraeae Nalepa, 1893 p. 105 ; Nalepa, 1895 pp. 635-636 t. 3 f. 7-8 (Additional description).

Eriophyes spiraeae: Nalepa, 1898 p. 29 ; Amrine & Stasny, 1994 p. 209 ; Xue et al., 2013 p. 18.

( Figs. 6 , 7 , Table 2)

Female (n=18) — Body vermiform, 169 (125-212), 49 (46-53) wide, 40 (27-48) thick.

Gnathosoma 20 (16-25), projecting obliquely downwards; chelicerae 18 (13-25), slightly curved down.

Prodorsal shield semicircular in dorsal view, 25 (17-36), 34 (29-39) wide, with a median line absent, admedian lines complete, divergent to rear, curving inwards posteriorly, first submedian lines complete, curving outwards at the middle of prodorsal shield, second and submedian lines on anterior half of prodorsal shield; scapular tubercles 18 (16-20) apart ahead of rear shield margin; scapular setae sc 14 (12-20, n=16), projecting forwards and convergently.

Leg I 32 (27-35), femur 10 (6-12), femoral setae bv 6 (4-9, n=15) on anterior 1/3 from the base of femur; genu 5 (4-6), genual setae l ″ 9 (7-15, n=9); tibia 6 (5-7), paraxial tibial setae l ′

4 (3-6, n=17) on anterior 1/2 from the base of tibia; tarsus 7 (4-8), tarsal solenidion ω 8 (6-11), curved with tiny knob apically, tarsal empodium em 6 (3-8), simple, 5–rayed.

Leg II 29 (26-31), femur 9 (7-13), femoral setae bv 5 (4-8, n=12) on anterior 1/3 from the base of femur; genu 5 (3-7), genual setae l ″ 7 (5-10, n=6); tibia 5 (3-6); tarsus 7 (6-8), tarsal solenidion ω 9 (8-12), curved with tiny knob apically, tarsal empodium em 5 (4-6), simple, 5–rayed.

Coxisternal plates smooth; prosternal apodeme entire, distinct. Anterior setae on coxisternum I 1b 5 (4-6, n=6), 8 (7-9) apart, near anterior margin of coxisternum I, far from proximal setae 1a on coxisternum I, 1a 6 (3-8, n=5), 8 (7-9) apart, a little ahead of line through proximal setae 2a on coxisternum II, proximal setae 2a 12 (11-13, n=5), 25 (23-26) apart.

External genitalia 13 (11-14), 21 (18-24) wide; coverflap subtriangular, with 7–11 longitudinal striae; setae 3a 12 (7-17, n=17), 17 (13-18) apart. Coxigenital region with 8 semiannuli, microtubercules.

Opisthosoma with subequal annuli: 65–78 dorsal, 64–72 ventral annuli with ellipsoid microtubercles on the margin. Opisthosomal setae c2 11 (7-19, n=8), 48 (45-51) apart on

10-13th annulus; d 11 (10-13, n=16), 33 (31-37) apart on 21–26th annulus; e 9 (7-13, n=17),

16 (15-18) apart on 40–45th annulus; f 9 (7-11, n=15), 25 (24-28) apart on 6–7th annulus from rear; h1 6 (5-7, n=17), 9 (7-12) apart and h2 25 (20-35, n=13), 13 (12-14) apart.

Male — Not found.

Specimens examined — 18 females on 18 microscopic slides of inventory nos. NHMW29905/1- 18 from vial no. 117 in Box S3 from the Nalepa mite collection deposited in the NHMW.

Host plant — Spiraea crenifolia (L.) Boiss. ( S. crenata L.).

Other host plants — Spiraea densiflora Nutt. ex Rydb. ( Keifer, 1952 ; Amrine & Stasny, 1994 ; Skoracka et al., 2005), Spiraea salicifolia L. ( Xue et al., 2013) ( Rosaceae ), Taxus baccata

L. ( Xue et al., 2013) ( Taxaceae ).

Type locality — Berlin, Germany. (Nalepa Collection Locality. Unknown).

Additional distribution — China ( Xue et al., 2013), USA ( Keifer, 1952), Poland ( Skoracka et al., 2005).

Remarks — According to Nalepa (1895), Eriophyes spiraeae had 6 longitudinal lines with a median line absent on the prodorsal shield and the admedian lines were jointed anteriorly. On the other hand, the topotype specimens had complete admedian lines, a pair of complete submedian lines and two pairs of short submedian lines anteriorly on prodorsal shield and admedian lines were not jointed anteriorly. Direction of scapular setae sc, position of scapular tubercles on the shield, number of abdominal annuli, number of rays on empodium em were not different between E. spiraeae and topotype specimens.

Figures

Figure 6 Drawing of Eriophyes spiraeae (Nalepa, 1893) (female). A – antero-lateral view of body; B – lateral view of abdomen; C – lateral view of telosoma; D – prodorsal shield; E – coxigenital region of female; F – empodium; G – internal genitalia of female.

Figure 7 Phase-contrast light microscope images of Eriophyes spiraeae. A; lateral view of body; B – dorsal view of prodorsal shield; C – coxigenital region of female.