Obdulia daadi, Al-Gboory, 1987: 94

Kamran, Muhammad, Khan, Eid Muhammad & Alatawi, Fahad Jaber, 2022, Genus Obdulia Pritchard and Baker (Acari: Tenuipalpidae) from Saudi Arabia; a new species and re-description of O. daadi Al-Gboory, Journal of Natural History 56 (41 - 44), pp. 1609-1625 : 1618-1624

Obdulia daadi, Al-Gboory, 1987: 94 .

Re-description of adult female (n = 16)

( Figures 7–11 )

Idiosoma oval 197–215 long, 122–133 wide. Length of body (gnathosoma + idiosoma) 236–250.

Dorsum ( Figure 7 ). Propodosoma medially with reticulate shield, surrounded by coarse striations. Area of sejugal suture with coarse transverse striations. Hysterosoma medially between setae c 1 and e 1 with transverse coarse striations, laterally and posteriad to setae d 1 with longitudinal coarse striations, two small reticulated shields present on hysterosoma laterally between setae c 1 and d 1. Dorsal setae broadly spatulate, subequal in length. Prodorsal setae v 2 about two-thirds as long as distance between their bases. Length of dorsal setae: Propodosomal setae three pairs, v 2 14–15, sc 1 15–16, sc 2 15; hysterosomal setae 11 pairs, c 1 15–16, c 2 14–15, c 3 11, d 1 15–16, d 2 14–15, d 3 15–16, e 1 13 –14, e 3 16 –17, f 3 16–17, h 1 12–13 h 2 12–13; distances between dorsal setae, v 2 –v 2 21–24, v 2 –sc 1 21–24, sc 1 –sc 2 21–23, sc 1 –sc 1 69–73, sc 2 – sc 2 100–105, c 1 –c 1 46–50, c 1 –c 2 29–33, c 2 –c 3 7–8, c 2 –c 2 100– 105, c 3 –c 3 110–115, c 1 –d 1 32–35, d 1 –d 1 36–40, d 1 –d 2 33–35, d 2 –d 2 110–115, d 2 –d 3 12–14, d 2 –c 3 40–44, d 3 –d 3 110–115, d 3 – e 3 20–23, e 1 – e 1 36–38, e 3 –e 3 104–109, e 1 – e 3 34–37, e 3 –f 3 20– 22, f 3 –h 2 16–18, h 2 –h 1 20–23, f 3 –f 3 83–87, h 2 –h 2 65–68, h 1 –h 1 25–28, e 1 –h 1 65–69. Dorsal setae broadly spatulate and serrate.

Venter ( Figure 8 ). Venter medially between setae 1a and genital plate with transverse striations. Length of ventral setae 1a 48–51, 3a 37–40, 4a 38–40, 1b 14–15, 1c 13, 2b 12–13, 2c 12, 3b 11–12, 4 b 11–12. Pregenital area with transverse smooth striations, with one pair ag setae, 11–12. Genital plate smooth with two pairs setae, g 1 11–12, g 2 10–11, g 1 –g 1 16– 18, g 1 –g 2 7–8, g 2 –g 2 30–32. Anal plates weakly developed, with two pairs of anal setae, ps1 = ps2 10. All ventral setae setiform and smooth.

Gnathosoma. Rostrum reaching the middle of genu I, palp with one segment, bears single seta distally. Subcapitulum without setae m.

Legs ( Figure 9 ). Length of legs I–IV (excluding coxae) 82–87, 75–79, 73–78 and 80–86, respectively. Setae and solenidia on leg segments: coxae 2–2–1–1; trochanters 1–1–2–1; femora 4–4–2–1; genua 3–3–1–0; tibiae 4–4–3–3, Tarsi 8 + ω–8 + ω–5–5. Dorsal setae on femur I, II and III, genu I and II broadly spatulate, similar to dorsal body setae.

Male. Idiosoma oval elongate, 173–179 long, 93–97 wide at setal row c, body including gnathosoma 201–207 long.

Dorsum ( Figure 10 ). Prodorsum medially smooth, laterally with few coarse longitudinal striations, hysterosoma smooth between setae c 1 and d 1, with coarse transverse striations between setae d 1 and e 1, with coarse longitudinal striations posteriad e 1. Number and shape of dorsal setae are similar to those of female; dorsal setal lengths: v 2 15, sc 1 16–17, sc 2 16–17, c 1 15–16, c 2 15–16, c 3 14–15, d 1 16–17, d 2 13–14, d 3 13, e 1 14 –15, e 3 13 –14, f 3 14– 15, h 1 13, h 2 13–14. Distance between dorsal setae: v 2 –v 2 21–23, sc 1 –sc 1 51–54, sc 2 –sc 2 72– 75, c 1 –c 1 35–38, c 2 –c 2 74–76, c 3 –c 3 86–89, d 1 –d 1 28–32, d 2 –d 2 74, d 3 –d 3 69–76, e 1 – e 1 19–23, e 3 –e 3 63–67, f 3 –f 3 53–57, h 1 –h 1 20–22, h 2 –h 2 38–41.

Venter ( Figure 11 ). Venter is similar to that of female in striations; length of ventral setae: 1a 43, 1b 16, 1c 15, 2b 13, 2c 14, 3a 37, 3b 12, 4a 39, 4b 12, ag 15; three pairs of genito-anal setae, g 1 11, g 2 11, ps 2 10; All ventral setae setiform and smooth. Aedeagus long, tube-like and bulbous distally as shown in Figure 11 .

Gnathosoma. Rostrum reaching to the distal part of femur I, setae on palp same as those of female.

Legs. Length of legs I–IV 81, 76, 76, 82, respectively. Chaetotaxy of leg segments same as that of female.

Distribution. Iraq (Al–Gboory, 1987); Iran ( Beyzavi et al. 2013).

Hosts. Tamarix pentandra (Al–Gboory, 1987).

Material examined. Eight females, two males, Wadi e Hanifa, Riyadh, 24.678°N, 46.768°E, 14 September 2012, 4 October 2012; six females, one male, Makkah Road near checkpost, Riyadh, 24.776°N, 46.561°E, 11 October 2012; two females, Al-Madina near Uhad mountain, 24.614°N, 39.760°E, 23 February 2013, all collected by M. Kamran . All the specimens were collected from Tamarix aphylla (Tamaricaceae) .

Ecological notes. All specimens of Obdulia daadi were collected from the leaves of Tamarix aphylla along with phytoseiid predatory mite, Paragigagnathus sp. ( Mesostigmata : Phytoseiidae ).

Saudi Arabian specimens of O. daadi were collected from the same host ( Tamarix aphylla ) as the type specimens and are almost identical to the original description (AlGboory 1987) except body length 236–250 in the former vs. 278 in the latter.

Figures

Figure 7. Obdulia daadi (female), dorsum.

Figure 8. Obdulia daadi (female), ventral.

Figure 9. Obdulia daadi (female), 9a. Leg I, 9b. Leg II, 9c. Leg III, 9d. Leg IV.

Figure 10. Obdulia daadi (male), dorsum.

Figure 11. Obdulia daadi (male), venter.