Aculus gebeliae, Kiedrowicz, Agnieszka, Denizhan, Evsel, Bromberek, Klaudia, Szydło, Wiktoria & Skoracka, Anna, 2016

Kiedrowicz, Agnieszka, Denizhan, Evsel, Bromberek, Klaudia, Szydło, Wiktoria & Skoracka, Anna, 2016, Eriophyoid mites (Acari: Prostigmata: Eriophyoidea) from Turkey: description of five new species, Zootaxa 4066 (3), pp. 255-270 : 264

Aculus gebeliae n. sp. Denizhan & Skoracka

( Figs. 7 & 8 )

Description. FEMALE (n=11). Body spindleform, 270 (260–310); 75 (62–80) wide. Gnathosoma curved downwards, 21 (20–22), dorsal pedipalpal genual seta d 8 (6–10), palpcoxal seta ep 2 (2), cheliceral stylets 20 (20– 30). Prodorsal shield triangularly oval, 43 (38–44), 59 (57–60) wide. Shield pattern: admedian and submedian lines forming pattern of two elongated circles in middle rear of shield with two laterally elongated circles above the dorsal tubercles, admedian lines incomplete with short fragments on front of shield. Tubercles of setae sc on rear shield margin, 29 (23–29) apart, seta sc 25 (23–28). Leg I 44 (38–48); femur 10 (10–11), genu 5 (5–6), tibia 8 (6– 9); tarsus 9 (8–9); solenidion tapered 11 (10–11); empodium 6 (6–7), simple, bilaterally symmetrical, with 7 (7) paired rays; femoral setae bv 14 (12–14), genual setae l′′ 24 (23–26), tibial setae l ′ 7 (7–8), tarsal setae ft ′ 20 (20– 22), setae ft′′ 25 (23–25), setae u ′ 7 (6–7). Leg II 45 (40–49); femur 10 (10–11), genu 5 (5–6), tibia 10 (9–10); tarsus 9 (9–11); solenidion tapered 10 (10–11); empodium 6 (6), simple, bilaterally symmetrical, with 7 (7) paired rays; femoral setae bv 16 (14–16), genual setae l′′ 12 (10–12), tarsal setae ft ′ 22 (20–23), setae ft′′ 25 (23–25), setae u ′ 6 (5–6). Coxal plates and suboral plate with short dashes and dots. Setae 1b 9 (7–10), 12 (9–12) apart; setae 1a 18 (14–19), 12 (10–12) apart; setae 2a 40 (35–43), 30 (26–33) apart; sternum 6 (6–10). Opisthosoma with 35 (35– 49) dorsal annuli with bead-like microtubercles, 71 (80–92) ventral annuli with tiny, pointed microtubercles; microtubercles elongated on posterior 2 (1–3) dorsal annuli. Setae c2 28 (25–38), on 5th (4th to 5th) annulus; setae d 38 (38–52), on 26th (23th to 27th) ventral annulus; setae e 27 (22–28), on 40th (47th to 55th) ventral annulus; setae f 28 (23–31), on 64th (76th to 86th) ventral annulus, 4th (4th to 5th) ventral annulus from rear. Setae h1 6 (3– 6); setae h2 62 (40–62). External genitalia 18 (16–18), 24 (21–25) wide, genital coverflap with 13 (11–15) striae; setae 3a 31 (30–36), 25 (22–26) apart.

Male, nymph and larva. Not found.

Type host plant. Lotus gebelia Vent. (Fabaceae) .

Relation to host plant. The mites were vagrant on leaves.

Type locality. Yoldöndü, Gevaş, Van, Turkey (42°46'55"E, 38°23'22"N), 2471 m above sea level, coll. E. Denizhan, 24 June 2008.

Type material. Holotype female [4051] and 7 female paratypes [4036(1–4), 4041, 4045 & 4047] deposited in the collection of the Faculty of Biology, Adam Mickiewicz University, Poznań, Poland and 3 female paratypes [4052, 4053 & 4055] deposited in the collection of the Department of Applied Entomology, Faculty of Horticulture, Biotechnology and Landscape Architecture, Warsaw University of Life Sciences – SGGW, Warsaw, Poland.

Etymology. The new species name (adjective in the genitive case, feminine) is derived from the specific name of its host plant.

Differential diagnosis. The new species, Aculus gebeliae , is the first eriophyoid mite to be found on the plant genus Lotus . It can be differentiated from Fabaceae-associated Aculus sarothamni ( Boczek 1961) (on Cytisus scoparius (L.) Link in Poland) by the number of dorsal and ventral annuli (25 dorsal annuli in A. sarothamni whereas there are 35–49 in A. gebeliae sp. n.; 57 ventral annuli in A. sarothamni whereas 71–92 are present in A. gebeliae sp. n.). The dorsal annuli and prodorsal shield are smooth in A. sarothamni , whereas in the new species, the dorsal annuli have bead-like microtubercles and the ornamentation on the prodorsal shield is explicated. Both species are vagrant on the leaves of their respective host plants. The smooth dorsal annuli and different ornamentation on the prodorsal shield can also separate this new species from Aculus fabus Boczek & Knihinicki, 1998 (from Vicia faba L. in Australia). Besides, these two species differ by the number of rays on the empodia (4- rayed in A. fabus and 7-rayed in A. gebeliae sp. n.) and the lack of accessory setae in A. fabus . No damage on leaves infested by A. gebeliae sp. n. was observed, whereas A. fabus causes rusting on the undersurfaces of leaves.

Figures

FIGURE 7. Semi-schematic line drawings of Aculus gebeliae n. sp., female: L. Lateral view; AD. Prodorsal shield; em. Empodium; CG. Coxigenital region; IG. Internal genitalia. Scale bar = 50 Μm for L, AD and CG; 25 Μm for IG; 9 Μm for em.

FIGURE 8. Micrographs of Aculus gebeliae n. sp., female, as viewed under phase contrast: 1. Lateral view; 2. Ventral view; 3. Dorsal view. Scale bar = 20 Μm for 1 and 3; 10 Μm for 2.