Amblyseius rademacheri Dosse, 1958

Kolodochka, L. A. & Gwiazdowicz, D. J., 2016, Redescription of three species of phytoseiid mites (Acari, Mesostigmata) from Poland, Acarologia 56 (4), pp. 625-632 : 628

Amblyseius rademacheri Dosse, 1958

( Figure 2 )

Amblyseius rademacheri Dosse, 1958: 44 , figs. 1-5

For full extensive bibliography of this widespread species see Demite et al., 2015.

Material examined — One female, from litter, no AG 59/1, data 23.07.2013, Wielkopolska National Park (52°14’48"N, 16°50’42"E), coll. D.J. Gwiazdowicz.

Description. Female. Dorsal shield ( Fig. 2A ) elongate, widened caudally, without constrictions at level of R 1, moderately sclerotized, reticulate, with 7 pairs of small solenostomes (gd1, gd2, gd4, gd5, gd6, gd8, gd9) and 17 pairs of setae. Dorsal setae acute, short and smooth with the exception of setae s4, Z4, Z5 much longer than others as well as setae Z4 and Z5 thick and roughly serrated. Seta j3 slightly shorter than distance between own base and base of seta z2. Seta z2 subequal in length to z4 (z2 1 to 2 µm longer). Setae S2 and S4 equal, and longer than S5. Seta Z5 more than 10 times longer than S5. All ventral setae thin, smooth, and pointed except JV5 serrated ( Fig. 2B ). Sternal shield with 2 pairs of solenostomes and 3 pairs of setae (St1-St3); St4 placed on separate metasternal platelets. Ventrianal shield broader than genital shield, scutiform with anterior and lateral margins slightly concave, lightly reticulated, with three pairs of preanal setae JV1, JV2 and ZV2. Anal pores distinct, inclined, disposed between setae JV2 and slightly behind their level. Four pairs of ventral setae (ZV1, ZV3, JV4 and JV5) on integument surrounding ventrianal shield. Long peritremes extend forward beyond bases of setae j1 ( Fig. 2A ). Chelicerae ( Fig. 2C ) normal in relation to body sizes. Fixed digit with 9 denticles, movable digit with 2. Posterior metapodal plates semi-oval, anterior platelets smaller and oblong ( Fig. 2D ). Funnel of spermatheca cup-shaped with large sedentary atrium, neck absent ( Fig. 2E ). Posterior part of peritremal shield as on Fig. 2F . Three elongate pointed macrosetae on leg IV ( Fig. 2G ), longest on basitarsus. Genu of legs I-III each with one short macroseta. Genu II with 8 short setae (1 - 2, 2 / 1, 1 - 1).

Measurements — Lds 385, Wds 235, Lvas 120,

Wvas 105, Lian 32, Ltar IV 123.

Setae — j1 23, j3 34, j4, j5 7, j6 9; J2 9, J5 9; s4 61; z2 16, z4 14, z5 8; Z1 11; Z4 82, Z5 98; S2 12, S4 12, S5 8; r3 19; R1 8; JV5 45; MCh IV: ge 64, ti 45, tar 81; MCh III: ge 34, ti 27; MCh II: ge 27; MCh I: ge 32 .

Males were absent in investigated material.

Notes — Features which distinguish A. rademacheri from A. krantzi were given in notes for A. krantzi . Females of A. rademacheri may be differentiated from similar A. andersoni by dorsal shield distinctly reticulated, presence of 2 teeth on moveable digit of chelicerae, and dorsal setae Z4 and Z5 roughly serrate and thick, as against in A. andersoni dorsal shield smooth, moveable digit of chelicerae with 3 teeth, and dorsal setae Z4 and Z5 slightly serrate and thin.

Amblyseius rademacheri inhabits mainly herbaceous plants, and also may be found on trees and shrubs. This species is widespread in many countries - Armenia, Austria, Azerbaijan, China - Jiangxi, Czech Republic, Denmark, Georgia, Germany, Hungary, Iran, Italy, Japan, Latvia, Moldova, Netherlands, Russia - Moscow Province, Primorsky Territory; Yaroslavl Province; Slovakia, Slovenia, South Korea, Spain, Switzerland, Ukraine ( Demite et al., 2015).

Figures

FIGURE 2: Amblyseius rademacheri (Dosse, 1958). Female: A – dorsal shield; B – fragment of ventral body surface; C – chelicera; D – metapodal plates; E – spermatheca; F – caudal part of peritremal shield; G – fragment of leg IV (bottom-up: tibia, genu, fragment of tarsus).