Tanytydeus bazavii, Khanjani, Mohammad, Nadri, Ali Reza, Khanjani, Masoumeh & Seeman, Owen D., 2014

Khanjani, Mohammad, Nadri, Ali Reza, Khanjani, Masoumeh & Seeman, Owen D., 2014, Post larval stages of Tanytydeus beyzavii sp. nov. (Acari: Paratydeidae) from Iran, Zootaxa 3895 (2), pp. 170-182 : 171-182

Tanytydeus bazavii sp. nov.

( Figs. 1–37 )

Diagnosis. Body large, length 600–720. Prodorsal shield bearing 2 pairs of setae (ve, sci), setae ve anterior to sci; dorsal folds between rows C–D and H–Ps strong, folds D–E, E–F, F–H showing intraspecific variability, being present, weakly formed or absent, setae c 1 23–29, c2 38–43, d 1 24–30, e 1 21 –28, h 2 30–35; medial pore between f1 absent. Aggenital plate with 6 pairs of setae and genital area with 8–10 pairs of setae and 3 pairs of genital papillae. Tarsi I with 1 solenidial pit distal to other.

FIGUES 6–7. Tanytydeus beyzavii sp. nov. (Female): 6. Dorsal view, showing the most extreme variation in the number of folds (only dorso-sejugal, C–D, and H-Ps fold present); 7. Aggenital and genital region, showing variation in ag setae (one anterior pair absent) and asymmetry in genital setae (lacking two on one side).

Description. FEMALE (holotype and 14 paratypes). Colour in life yellow. Idiosoma elongate, body constricted slightly at level of legs III–IV. Length of body (including gnathosoma) 680 (600–720); (excluding gnathosoma) 635 (550–665); width 280 (210–265); length of leg I 225 (215–230); leg II 160 (155–165); leg III 170 (160–175); leg IV 205 (200–205).

Dorsum ( Figs. 1 , 6). Idiosoma with longitudinal striae, except for medial area of oblique to transverse striae between setal rows C and D, at level of leg III. Prodorsum with linear, crista-like shield and 3 pairs of setae (ve, sci, sce), trichobothrial setae sci and setae ve on margin of prodorsal shield, setae sce on soft cuticle, 2 pairs of peg-like setae (ep, epI) on dorsal palp coxa and coxal fields I respectively. Dorso-sejugal suture weakly to strongly formed.

Opisthosoma with 6 pairs of setae and 2 pairs of cupules (im, ip); segment C with 3 pairs of setae c1, c2, and 1 pair of cupules (ia); all dorsal setae simple. Folds between setal rows C–D and H–Ps always present; folds between rows D–E, E–F, F–H showing intraspecific variation, being present, weakly formed or absent (e.g., compare Figs. 1 , 6). Lengths of dorsal setae: ve 20 (18–28), sci 47 (44–57), sce 34 (24–34), c1 29 (23–27), c2 40 (38–43), d1 30 (24–28), e1 26 (21–28), f1 25 (21–24), f2 30 (27–34), h1 31 (26–30), h2 35 (30–33), ps1 23 (24–28), ps2 31 (28–33), ad1 26 (24–25); distances between dorsal setae: ve–ve 23 (20–25), sci–sci 18 (18–23), sce–sce 80 (40–76), c1–c1 44 (33–60), c2–c2 205(140–190), d1–d1 85 (48–70), e1– e 1 88 (58–75), f1–f1 56 (58–65), f2–f2 205 (155–195), h1–h1 63 (40–88), h2–h2 150 (115–145), ve–sci 13 (9–13), sci–sce 38 (37–42), c1–c2 74 (50–65), c1–d1 133 (115–140), d1– e 1 77 (70–78), e1–f1 67 (53–90), f1–f2 85 (59–67), f1–h1 100 (87–94), f1–h2 120 (105–115), f2–h2 76 (61–80), f2–h1 94 (49–87), h1–h2 45 (29–49).

Venter ( Figs. 2–3 , 7) Ventral idiosoma with longitudinal striae. Endopodal shields absent. Length of setae 1a 34 (30–35), 1b 23 (14–21), 1c 26 (23–26), 1d 23 (20–22), 2b 19 (17–18), 2c 30 (24–32), 2d 25 (26–31), 3a 30 (31–34), 3b 26 (20–24), 3c 38 (31–35), 4b 26 (21–27), 4c 33 (21–27), ag1 13 (12–15), ag2 16 (14–20), ag3 26 (25–28), ag4 26 (24–27), ag5 26 (24–27), ag6 25 (24–27), g1 16 (14–16), g2 19 (16–20), g3 15 (13–16), g4 13 (13–14), g5 12 (11–13), g6 10 (10–12), g7 17 (16–19), g8 16 (14–16), g9 12 (11–12), g10 12 (10–11), ps3 31 (29–32), ad2 27 (26–28), ad3 22 (20–23). Aggenital area with 5 or 6 pairs of setae (ag1–6; some asymmetrical, Fig. 3 ): inner row with 1 or 2 pairs of setae (ag1-2), outer row with 4 pairs (ag3-6) almost in longitudinal row; genital plate bearing 8 to 10 pairs of genital setae (g1-10); often asymmetrical, Fig. 7), 3 pairs of genital papillae (Va, Vm, Vp) and 3 pairs of minute setae (k1-3) located anterior to each papilla; anus flanked by 3 pairs of setae (ad1-3); paranal region with 3 pairs of setae, setae ps1 dorsal and ps2-3 ventrolateral; cupules ih anterolateral to setae ps3.

Gnathosoma ( Figs. 4–5 ). Ventral infracapitulum with 2 pairs of subcapitular setae, m 17 (17–19), n 10 (10–11) and 2 pairs of adoral setae ao1 8 (7–8), ao2 6 (6–7) ( Fig. 5 ). Palps 4-segmented, palp trochanters nude, femoragenua with 2 setae, tibiae with 3 setae and tarsi with 4 simple setae and 3 eupathidia ( Fig. 5 ). Chelicera 48 (44–48) long with dorsal seta and small moveable digit ( Fig. 4 ).

Legs ( Figs. 8–12 ). Legs about one third of body length. Leg solenidia represented by pits. Setal formulae of leg segments as follows (solenidia in brackets, included in count): coxae 4–3–2–2; trochanters 0–1–1–0; [basi]femora [4]5–3–3–[1]2, genua 8(1)–5(1)–2–3; tibiae 9(1)–5(1)–4(1)–3; tarsi 16(2)–9(1)–6–5. Eupathidia: tibia I, d1, (l); tarsus I, (ft), (tc), (p); tarsus II, pl ′. Tarsus II with bl′′ short, peg-like.

MALE (7 paratypes). Body elongate. Length of body (including gnathosoma) 635–685; (excluding gnathosoma) 580–625; width 260–300; length of leg I 215–230; leg II 145–160; leg III 160–175, leg IV 180–205.

Dorsum ( Fig. 13 ). Dorsum similar to female. Lengths of dorsal setae: ve 18–28, sci 41–55, sce 30–39, c 1 24–37, c 2 29–46, d 1 25–31, e 1 24 –29, f 1 24–32, f 2 30–40, h 1 26–32, h2 32–40. Distances between dorsal setae: ve–ve 25–28, sci–sci 16–23, sce–sce 53–80, c1–c1 52–60, c2–c2 145–215, d1–d1 45–70, e1– e 1 63–75, f1–f1 51–73, f2– f2 163 –210, h1–h1 45–62, h2–h2 114–183, ve–sci 10–17, sci–sce 37–43, c1–c2 59–79, c1–d1 115–141, d1– e 1 60–75, e1–f1 67–93, f1–f2 67–95, f1–h1 75–94, f1–h2 102–118, f2–h2 55–80, f2–h1 80 –93, h1–h2 44 –63.

Venter ( Figs. 14–16 ). Ventral idiosoma similar to female except for genitalia ( Fig. 10 ). Lengths of ventral setae: 1a 27–30, 1 b 14–21, 1 c 20–26, 1 d 21–26, 2 b 16–19, 2 c 26–34, 2 d 28–35, 3 a 29–35, 3 b17–24, 3 c 29–36, 4 b 21–26, 4 c 29–34, ps 1 23–30, ps2 32–35, ps 3 31–36, ad 1 26–27, ad 2 26–32, ad 3 20–32. Aggenital area with 6 pairs of setae (ag1–6): anterior 2 pairs of aggenital setae (ag1-2) forked ( Fig. 15 ) and rest of aggenital setae (ag3-6) simple; genital plate bearing 12 pairs of forked setae (g1-12), setae g2 unpaired, 3 pairs of genital papillae. Internal genitalia with 10 pairs of setae, form as shown in Figure 16 .

Gnathosoma ( Figs. 17–19 ). Ventral infracapitulum with 2 pairs of infracapitular etae m 43–51 and n 40–52, 2 pairs of adoral setae ao 1 22–27, ao 2 24–28 ( Fig. 18 ). Palp similar to female ( Fig. 19 ). Chelicera 43–57 long, similar to female ( Fig. 18 ).

Legs. Setae form and number same as female.

TRITONYMPH (4 paratypes) Body elongate, 500–565 long, 175–215 wide; length of leg I 195–205; leg II 135–140; leg III 145–160; leg IV 175–185.

Dorsum. Dorsum similar to female. All dorsal setae simple. Lengths of setae: ve 18–21, sci 48–55, sce 26–35, c 1 24–30, c2 32–38, d 1 23–26, e 1 20 –23, f 1 29–38, f 2 30–40, h 1 26–32, h 2 31–41. Distances between dorsal setae: ve–ve 20–24, sci–sci 17–19, sce–sce 70–78, c1–c1 51–56, c2–c2 155–165, d1–d1 46–54, e1– e 1 51–58, f1–f1 41–52, f2– f2 120–164, h1–h1 35–44, h2–h2 108–133, ve–sci 9–12, sci–sce 36–41, c1–c2 51–57, c1–d1 97–113, d1– e 1 51–60, e1–f1 67–74, f1–f2 46–58, f1–h1 76–83, f2–h2 52–64, h1–h2 38 – 41.

Venter ( Fig. 20 ). Ventral surface same as in adult female except aggenital area with 4 pairs of setae (ag1–4); genital plate bearing 5 pairs of genital setae (g1-5), 3 pairs of genital papillae (Va, Vm, Vp) and 3 pairs of minute setae (k1-3) located anterior to each papilla; anus flanked by 3 pairs of setae (ad1-3); paranal region with 3 pairs of setae, setae ps1 dorsal and ps2-3 ventrolateral; cupules ih anterolateral to setae ps3. Lengths of ventral setae: 1a 33–35, 1 b 18–20, 1 c 25–28, 1 d 15–22, 2 b 16–17, 2 c 27–29, 2 d 15–22, 3 a 30–33, 3 b 22–25, 3 c 27–36, 4 b 21–27, 4 c 26–30, ps 1 23–33, ps 2 29–33, ps3 33–40, ad 1 20–25, ad 2 25–29, ad 3 25–29.

Gnathosoma ( Fig. 21 ). Ventral infracapitulum with 2 pairs of subcapitular setae m 13–18 and n 15–18, 2 pairs of adoral setae ao1 6–8, ao2 6–9 ( Fig. 21 ). Palp similar to female.

Legs ( Figs. 22–25 ). Setae form and number same as adults.

DEUTONYMPH (3 paratypes). Body elongate, 450–480 long, 175–180 wide; length of leg I 175–190; leg II 120–130; leg III 135–145, leg IV 155–165.

Dorsum. Dorsal integument same as in adult female. Lengths of setae: ve 18–21, sci 49–50, sce 27–29, c 1 23–30, c2 36–38, d 1 24–27, e 1 21 –24, f 1 24–30, f 2 25–30, h 1 26–32, h2 33–41. Distances between dorsal setae: ve–ve 19–20, sci–sci 15–19, sce–sce 69–71, c1–c1 43–51, c2–c2 170–175, d1–d1 46–55, e1– e 1 51–59, f1–f1 50–52, f2– f2 125–126, h1–h1 33–36, h2–h2 87–100, ve–sci 9–10, sci–sce 33–38, c1–c2 45–55, c1–d1 80–98, d1– e 1 51–59, e1–f1 60–65, f1–f2 45–46, f1–h1 66–68, f2–h2 43–50, h1–h 2 28 – 34.

Venter ( Fig. 26 ). Ventral idiosoma with longitudinal striae. Genital plate with 2 pairs of genital setae, 2 pairs of genital papillae (Va, Vm) and 2 pairs of minute setae (k1-2) located anterior to each papilla; aggenital plate with 2 pairs of setae (ag1-2). Lengths of ventral setae: 1a 31–35, 1 b 16–19, 1 c 26–26, 1 d 16–20, 2 b 12–15, 2 c 22–27, 2 d 30–32, 3 a 26–32, 3 b 25–26, 3 c 32–36, 4 b 18–20, 4 c 26–28, ps 1 20–23, ps 2 27–31, ps3 35–34, ad 1 20–25, ad 2 25–26, ad 3 25–19.

Gnathosoma ( Fig. 27 ). Ventral infracapitulum with 2 pairs of subcapitular setae m 14–15 and n 11–12, 2 pairs of adoral setae ao1 6–7, ao2 6–9.

Legs ( Figs. 28–31 ). Setae form and number same as adults except: femur I [2]5 (l1′, l1′′ absent); tibia I eupathidia l ′ (setae d1, l′′ setiform).

PROTONYMPH (1 paratype). Body elongate, 400 long, 175 wide; length of leg I 165; leg II 115; leg III 130, leg IV 135.

Dorsum. Dorsum same as adult female. Lengths of setae: ve 16, sci 45, sce 22, c1 22, c2 34, d1 23, e1 18, f1 24, f2 30, h1 23, h2 30. Distances between dorsal setae: ve–ve 22, sci–sci 15, sce–sce 59, c1–c1 46, c2–c2 130, d1–d1 44, e1– e 1 43, f1–f1 38, f2– f2 115, h1–h1 38, h2–h2 90, ve–sci 9, sci–sce 30, c1–c2 42, d1– e 1 45, e1–f1 52, f1–f2 41, f1–h1 51, h1–h2 30.

Venter ( Fig. 32 ). Ventral idiosoma with longitudinal striae. Genital plate with 1 pair of genital papillae (Va) and associated eugenital seta (k1); genital area with 1 pair of setae (ag). Lengths of ventral setae: 1a 27, 1 b 14, 1 c 13, 1 d 14, 2 c 27, 2 d 25, 3a 30, 3 b 18, 3 c 30, ps1 19, ps2 30, ps3 30, ad1 8, ad2 16, ad3 5.

Gnathosoma ( Fig. 33 ). Ventral infracapitulum with 2 pairs of subcapitular setae m 13 and n 7, 2 pairs of adoral setae ao1 6, ao2 4.

Legs ( Figs. 34–37 ). Setae form and number same as deutonymph except: coxae IV bare (setae 4b, 4c absent); femur IV bare; tibia IV with 2 setae (v ′ absent); tarsus IV with 3 setae (( tc) absent).

LARVA. Unknown.

Remarks. Tanytydeus bezavii sp. nov. resembles T. kakadu most closely by having six pairs of aggenital setae, setae ve anterior to sci and almost identical setation (Table 1). The new species differs from T. kakadu by having 8–10 pairs of genital setae (6–7 pairs in T. kakadu ), a larger body size (550–685 in T. beyzavii versus 455 in T. kakadu ) and longer dorsal setae (c 1 23–29, c2 38–43, d 1 24–30, e 1 21 –28 in T. beyzavii versus c1 15, c2 24, d1 14, e1 15 in T. kakadu ).

Etymology. This species is named in honour of Mr G.R. Beyzavi, who kindly provided some mite specimens.

Type material. Holotype female from soil under gum bushes, Astragalus gossypinus Fisch. (Fabaceae) , IRAN: Lorestan Province, Alashtar, Kahman, 33 53′09″N, 48 19′28″E, and altitude 1,925 m above sea level, 10, 27 October and 18 November 2012, coll. A. Nadri; 5 paratype females and 7 paratype males the same as holotype. Nine female, five tritonymph, four deutonymph and one protonymph paratype [soil under unknown plant], IRAN: Fars Province, south of Kamfiroz region, 24 October and 1 August 2010, coll. G.R. Beyzavi.

Type depositions. The holotype female, 8 female, 6 male, 4 tritonymphs, 3 deutonymph paratypes are deposited as a slide–mounted specimens in the Collection of the Acarology Laboratory, University of Bu–Ali Sina, Hamadan, Iran. Six female, one male, 1 tritonymphs, 1deutonymph and 1 protonymph paratypes are deposited in the Queensland Museum, South Brisbane, Australia.

TABLE 1. Leg setation of adult Tanytydeus compared with Scolotydaeus anatolicus . T. beyzavii and T. kakadu have maximum setation for the Paratydeidae . Losses are shown in bold font. *1 T. lamington lacks the eupathidial pl ′ rather than setiform tc ′. *2 T. lamington may lack both d and v ′ and instead l ′ may be present. Eupathidia: tibia I, (l), d1; tarsus I, (ft), (tc), (p); tarsus II, pl ′. Tarsus II with bl′′ short, peg-like.

LEG I Cx Tr [BaFe]Fe Ge Ti Ta

T. beyzavii 1a 1b 1c 1d 0 [d1 (l1) bv] d d1 l1′ d (l) (v) d1 l1′ v1 ′′ d (l) (ft) (tc) (pl) (p) (vb)

(l)(v) σ (v) φ (ve) (u) (ω) T. Kakadu 4 0 [4]5 8(1) 9(1) 16(2) The description of this new species invites further consideration of some notations for the body and leg setae of the Paratydeidae . On the body, we suggest that the seta previously considered c3 (e.g., Seeman & Walter 1999) is more parsimoniously considered seta 3a. In the putative sister family of the Paratydeidae , the Stigmocheylidae, seta c3 is absent and 3a is present but placed on the coxa ( Bochkov 2008). Therefore, if the seta c3 is instead considered 3a in the Paratydeidae , we require it only to move into soft cuticle. In contrast, to consider it seta 3c, we require seta c3 to be retained but seta 3a to be lost. Furthermore, this seta is situated ventrally on the completely longitudinal ventral striae, as opposed to the lateral regions with curved striae, suggesting it is affiliated with the intercoxal region of the mite.

The coxisternal seta designated here as 2c could be considered 2a based on its position. However, Bochkov (2008) found that coxisternal seta 2a is absent in some Stigmocheylidae. Since paratydeid mites could be considered as morphologically regressed stigmocheylid mites, we follow Bochkov (2008) by designating this seta as 2c rather than 2a. We also note that seta 2a is lost frequently in other groups of prostigmatic mites, such as the Tetranychoidea (e.g., Lindquist 1985).

Leg setation of the Paratydeidae was first presented for S. anatolicus by Dönel et al. (2012). Within Tanytydeus , the new species and T. kakadu show the maximum complement of leg setae currently known for the family (Table 1). In view of this more complete setation, some modifications to the notations presented in Dönel et al. (2012) are required.

On tarsus II of S. anatolicus , the tiny seta situated next to the solenidion is bl′′, not ft ′ as presented in Dönel et al. (2012). The seta labelled tc ′ is instead considered ft ′, and seta tc ′ is absent. The same setation is also found in T. cristatus (Table 1). The full complement of tarsal phaneres is (ft), (tc), (u), pl ′, bl′′ and ω, with seta tc ′ absent in T. cristatus and S. anatolicus and seta pl ′ absent in T. lamington (Table 1).

On tarsus III, the five setae labelled by Dönel et al. (2012) need to be re-interpreted in light of the setation of all species of Tanytydeus , which have six setae, i.e., (ft), (tc) and (u). The seta pl′′ in Dönel et al. (2012) is now considered absent; this seta is tc′′, and the setae labelled as the tectal pair are instead considered the fastigial pair. In S. anatolicus seta tc ′ is absent on tarsus III.

On tarsus IV, the five setae labelled by Dönel et al. (2012) are interpreted differently to those on tarsus III. Again, seta pl′′ is absent and this seta should be considered tc′′. However, the setae labelled as (tc) are considered a fastigial and a tectal seta, with the more proximal, dorsal seta being changed from tc′′ to ft ′. The five setae on tarsus IV of S. anatolicus and all Tanytydeus are therefore ft ′, (tc) and (u) (Table 1).

Figures

FIGURES 1 – 5. Tanytydeus beyzavii sp. nov. (Female): 1. Dorsal view; 2. Ventral view; 3. Aggenital and genital region; 4. Chelicerae and peritremes; 5. Infracapitulum and palp. Dorsal folds labelled; DSj = dorso-sejugal fold.

FIGURES 8 – 12. Tanytydeus beyzavii sp. nov. (Female): 8. Leg I; 9. Tarsus I; 10. Leg II; 11. Leg III; 12. Leg IV.

FIGURES 13 – 19. Tanytydeus beyzavii sp. nov. (Male): 13. Dorsal view; 14. Ventral view; 15. Genital plate; 16. Genital region; 17. Chelicerae and peritremes; 18. Infracapitulum; 19. Palp.

FIGURES 20 – 25. Tanytydeus beyzavii sp. nov. (Tritonymph): 20. Ventral view; 21. Infracapitulum and palp; 22. Leg I; 23. Leg II; 24. Leg III; 25. Leg IV.

FIGURES 26 – 31. Tanytydeus beyzavii sp. nov. (Deutonymph): 26. Ventral view; 27. Infracapitulum and palp; 28. Leg I; 29. Leg II; 30. Leg III; 31. Leg IV.

FIGURES 32 – 37. Tanytydeus beyzavii sp. nov. (Protonymph): 32. Ventral view; 33. Infracapitulum and palp; 34. Leg I; 35. Leg II; 36. Leg III; 37. Leg IV.