Schizotetranychus ugarovi Wainstein, 1960

Bastani, Dariush & Asadi, Mahdieh, 2019, Redescription of Schizotetranychus ugarovi Wainstein (Acari: Tetranychidae) based on new materials from Iran, Persian Journal of Acarology 8 (1), pp. 19-26 : 20-24

Schizotetranychus ugarovi Wainstein, 1960 ( Figs. 1–20 )

Schizotetranychus ugarovi Wainstein, 1960: 176 .

S. ugarovi: Ripka 1998: 429 .

S. ugarovi Kontschan & Ripka, 2017: 1215 .

Diagnosis

Female – Tibial setal count 10(1)-6-6-6, dorsal idiosomal setae are longer than distances between consecutive setae, tarsi I and II with p'ζ smaller than p"ζ.

Male – Aedeagus angular, with large tapered posterior projection, anterior projection small, angular knob of aedeagus 3–4 × neck, palp spinneret absent.

Description

Female ( Figs. 1–6 , 9, 11–14 ) – Length of body (v 1 –h 1) 244–270; width (c 3 –c 3) 216–233; leg I 180–209; leg II 150–164; leg III 160–180; leg IV 173–192.

Dorsum ( Figs. 2–3 ) – Dotted line striation, dorsal setae serrate ( Fig. 3 ) and longer than distances between consecutive setae. Dorsocentral hysterosomal setae long enough to reach well past base of next posterior seta on the first posterior row but not reach to the base of posterior seta on the second posterior row. Prodorsum longitudinally striate, opisthosoma transversally striate and laterally with longitudinal striae.

Measurements (n = 3) – Mean length of dorsal setae as follows: v 1 52 – 57, sc 1 88 – 99, sc 2 58 – 66; opisthosomal setae: c 1 80 – 90, c 2 82 – 91, c 3 74 – 80, d 1 82 – 85, d 2 82 – 89, e 1 80 – 90, e 2 85 – 92, f 1 76 – 88, f 2 67 – 71, h 1 56 – 63. Distances between dorsal setae: v 1 –v 1 60–67, sc 1 –sc 1 82–87, sc 2 –sc 2 174–182, c 1 –c 1 58–63, c 2 –c 2 125–129, c 3 –c 3 216–233, d 1 –d 1 62–74, d 2 –d 2 153–161, e 1 – e 1 53–63, e 2 –e 2 132– 141, f 1 –f 1 37–42, f 2 –f 2 80–85, h 1 –h 1 23–24.

Venter ( Fig. 4 ) – Venter transversally striate between setae g 1 and opisthosoma with transverse to oblique striae laterally. Two pairs of ventrocaudal (h 2-3) and two pairs of pseudanal setae (ps 1–2) present. Lengths of intercoxal setae: 1a 34–40, 3a 34–37, 4a 32–36, g 1 19–22, g 2 23–24, ps 1 13–15, ps 2 14–16, h 2 21–23, h 3 24–28, 1a–1a 24–34, 3a–3a 56–61, 4a–4a 46–52.

Gnathosoma ( Figs. 1 , 9 ) – Palpal tibia (dPTi, l'PTi, l"PTi), palpal tarsus (3 tactile setae (a, b, c), 3 eupathidial (ul'ζ, suζ, ul"ζ), 1 solenidion (ω). Spinneret well developed, more than two times as long as broad: 5 long, 3 wide. Peritremes straight distally ending in a small bulb ( Fig. 1 ).

Legs ( Figs. 5–6 , 11–14 ) – Distribution of tactile setae and solenidia (in parentheses): setation of legs I–IV: coxae 2-2-1-1; trochanters 1-1-1-1; femora 10-7-3-2; genua 5-5-4-4; tibiae 10(1)-6-6-6; tarsi 14(1) + 2dupl.-13(1) + 1dupl.-10(1)-10(1); tarsus I with 4 tactile setae and one sensory seta proximal to the proximal pair of duplex setae, two tactile setae in a transverse line with a proximal pair of duplex setae. Empodia I–IV similar, empodia split into 2 uncinate claws ( Figs. 11–14 ). Length of duplex setae on the leg I: ω' 43, ft' 11, ω'' 56, ft'' 14 and on leg II: ω" 30, ft" 16, p"ζ (I: 13 and II: 14) p'ζ (I: 10 and II: 8)

Male ( Figs. 7–8 , 10, 15–20 ) – Length of body (v 1 –h 1) 180; width (c 3 –c 3) 140; leg I 190; leg II

152–170; leg III 157; leg IV 170.

REDESCRIPTION OF SCHIZOTETRANYCHUS UGAROVI FROM IRAN

Dorsum – Smooth striation, lengths of setae: prodorsal setae: v 1 46, sc 1 74, sc 2 48; opisthosomal setae: c 1 58, c 2 63, c 3 59, d 1 58, d 2 66, e 1 50, e 2 67, f 1 44, f 2 40, h 1 26. Distances between dorsal setae: v 1 –v 1 52, sc 1 –sc 1 70, sc 2 –sc 2 129, c 1 –c 1 57, c 2 –c 2 93, c 3 –c 3 140, d 1 –d 1 52, d 2 –d 2 100, e 1 – e 1 31, e 2 –e 2 69, f 1 –f 1 22, f 2 –f 2 42, h 1 –h 1 16.

Venter ( Figs. 17–20 ) – Aedeagus angular, with large tapered posterior projection, anterior projection small, angular knob of aedeagus 3–4 × neck. Lengths of intercoxal setae: 1a 26, 3a 27, 4a 26, g 1 11, g 2 11, ps 1 8, ps 2 8, h 2 15, h 3 15, 1a–1a 19, 3a–3a 40, 4a–4a 30.

Gnathosoma ( Fig. 10 ) – Setation of palp: femur (dPFe), genu (l"PGe), tibia (l'PTi, dPTi, l"PTi), tarsus (3 tactile setae (a, b, c), 2 eupathidia (ul'ζ, ul"ζ), 1 solenidion (ω): 3 long, 1 wide. Spinneret absent.

Legs ( Figs. 7–8 ) – Distribution of tactile setae and solenidia (in parentheses): setation of legs I– IV: coxae 2-2-1-1; trochanters 1-1-1-1; femora 10-7-3-2; genua 5-5-4-4; tibiae 13(4)-6-6-6; tarsi 16(3)+2dupl.-13(1)+1dupl.-10(1)-10(1); tarsus I with 4 tactile and two sensory setae proximal to proximal pair of duplex setae, two tactile setae and one sensory setae in a transverse line with proximal pair of duplex setae. Empodia I–IV similar, empodia split into 2 uncinate claws hairs.

Length of duplex setae on the leg I: ω' 38, ft' 11, ω'' 46, ft'' 12 and on leg II: ω" 27, ft" 10. Tarsus I and II with p'ζ smaller than p"ζ. p"ζ (I: 12 and II: 12) p'ζ (I: 7 and II: 8)

REDESCRIPTION OF SCHIZOTETRANYCHUS UGAROVI FROM IRAN

Distribution

Tajikistan, Hungary, Iran.

Remarks

Schizotetranychus ugarovi belongs to the group 17 th of Schizotetranychus grouping defined by Flechtmann (2012). This species is unique in this group and easily separated from other members based on the tibial setal counts 10(1)-6-6- 6 in adults. Two host plants were reported for this species: Alhagi pseudalhagi (Fabaceae) ( Wainstein 1960) and Prunus spinosa (Rosaceae) ( Ripka 1998).

Wainstein (1960) originally described this species from Tajikistan, on Alhagi pseudalhagi (Fabaceae) . Ripka (1998) reported and collected this species from Budapest, Hungary. In 2017, Kontschan and Ripka mentioned this species in their checklist of Hungarian spider mites. Although Iranian specimens match the original description, we redescribed this species because the original description lacks details. Our new specimens match the exemplar, except that Wainstein gave the tarsus setal counts as 18-15-10-10 while we found it to be 16-14-10-10. Probably he counted each set of duplex setae as two setae because his figures have been drawn correctly.

Material examined

Seven females, three males, ex. Alhagi maurorum (Fabaceae) , Sirjan, Kerman province, Iran, (29° 33' N, 55° 38' E) (AMSL: 1766 m), 14 May 2017, Dariush Bastani, SBUK.

Figures

Figure 4. Schizotetranychus ugarovi Wainstein, 1960 (female) – Genito-ventral area.

Figures 1–3. Schizotetranychus ugarovi Wainstein, 1960 (female) – 1. End of peritreme; 2. Dorsum; (3) Dorsal setae d2.

Figures 5–8. Schizotetranychus ugarovi Wainstein, 1960 – 5. Tibia and tarsus I (female); 6. Tibia and tarsus II (female); 7. Tibia and tarsus I (male); (8) Tibia and tarsus II (male).

Figures 9–20. Schizotetranychus ugarovi Wainstein, 1960 – 9. Palpal tibia and tarsus of female; (10) Palpal femur-tarsus of male; 11–14. Empodium I–IV of female respecttively; 15. Empodium I of male; 16. Empodium IV of male; 17–20. End of the idiosoma, and aedeagus.