Pterygosoma sinaita Jack, 1961

Fajfer, Monika, 2020, A systematic revision of the scale mite genus Pterygosoma Peters, 1849 (Acariformes: Pterygosomatidae), Zootaxa 4805 (1), pp. 1-147 : 45-48

Pterygosoma sinaita Jack, 1961 ( Figs 35 and 36 )

Pterygosoma sinaita Jack, 1961: 241 , figs 1–2, 1962: 593, fig. 12.

Type host: Pseudotrapelus sinaitus (Sauria: Agamidae ). Type locality: Saudi Arabia.

Redescription. FEMALE (based on 1 lectotype and 2 paralectotypes from Trapelus mutabilis ). Gnathosoma . Chelicerae 140 long (120–130 long in 6 non-type specimens from type host species, P. sinaitus ), swollen cheliceral part 65–70 (55–65) long, slender distal part 65–70 (60–75) long. Fixed cheliceral digit 10 (10–15) long, with several apical tines. Setae dF 20–25 long and dG 20 long. Palpal tibia with short claw. Palpal tarsi with 3 setae. Subcapitu- lar setae n absent. Peritremes 110–120 (105–110) long. Hypostome 110 (90–115) long, with slightly flattened apex. Idiosoma 470–520 (385–430) long and 845–900 (680–730) wide. Dorsum with 25–28 (21–24) pairs of antero-lateral serrate setae, 15–20 (15–20) long: anterior group consisting of 15–18 (14–17) setae, lateral group consisting of 10 (6–9) setae. Two pairs of filiform setae posterior to lateral group, 20–30 (20–30) long. Medial part with 3 pairs of dorso-median setae dm1–dm3. Setae dm1 filiform and 25 (15–25) long, setae dm2 and dm3 flattened and slightly serrate on apical half, about 60 (30–70) long. Postero-lateral part with 6 (6–7) pairs of serrate and flattened setae, 55–75 (60–85) long. Eyes present. Venter with 3 pairs of smooth ventro-median setae vm1–vm3. Genital slit situated mainly ventrally. Genital series represented by smooth and spine-like setae g1–g4, 25–35 (20–25) long. Pseudanal series represented by 6 pairs of setae ps1–ps6. Setae ps1 spine-like and smooth or slightly serrate in apical part 25–30 (30–35 long), setae ps2–ps6 with minute spicules in apical part, 55–80 (40–70) long. Legs chaetotaxy: trochanters I–IV (1–1–1–1), femora I–IV (3–1–1–1), genua I–IV (3–0–0–0), tibiae I–IV (5–3–3–3). Setation of tarsi I−IV as in group A i. e. tarsi I 13 setae (ft, tc’, tc”, p’, p”, a’, a”, it’, it”, u’, u”, vs’, vs”) and solenidion ω1; II 8 setae (tc’, p’, p”, a’, a”, u’, u”, vs’) and ω1; III and IV with 8 setae each (tc’, p’, p”, a’, a”, u’, u”, vs’). Setae vs’ and vs” of legs I–IV smooth.

MALE (based on 2 specimens from Trapelus mutabilis ). Gnathosoma as in female. Chelicerae 80–85 long, swollen cheliceral part and slender distal part subequal in length, 40–45 long. Fixed cheliceral digit short, about 5 long, with spinous process. Hypostome with smooth rounded apex, 65 long. Peritremes about 70 long. Idiosoma 235–305 long and 460–505 wide. Dorsum with 2 groups of serrate setae 10–25 long: anterior group consisting of 10–11 pairs and lateral group of 4–5 pairs of setae. Postero-lateral part of idiosoma with 5 pairs of setae, 30–55 long, and medial part with 3 pairs of dorso-median setae dm1–dm3. Aedeagus 130–140 long, directed forward; genito-anal opening with 1 pair of filiform setae. Venter. Setae vm1 filiform, vm2 and vm3 slightly serrate. Legs as in female.

PROTONYMPH (based on description presented in Jack 1961, amended). Gnathosoma as in female. Chelicerae about 95 long, basal swollen part about 45 long, slender distal part about 50 long. Idiosoma 240 long and 510 wide. Dorsum with 13 pairs of antero-lateral serrate setae, 5–15 long: anterior group consisting of 9 setae, lateral group consisting of 4 setae. One pair of filiform setae, 15 long, present posterior to lateral group. Medial part with 4 pairs of dorso-median setae dm1–dm4. Setae dm1 and dm2 smooth and 15–25 long, setae dm3 and dm4 slightly serrate and apically expanded, 35–45 long. Postero-lateral part with 5 pairs of serrate and slightly apically expanded setae: 3 pairs situated laterally, 30–45 long, and 2 pairs situated posteriorly, 50–60 long. Eyes present. Venter as in female. Genital slit situated ventrally. Genital series represented by 3 pairs of spine-like short genital setae, about 5 long. Pseudanal series represented by 5 pairs of serrate setae ps1–ps5, 5, 10, 15, 35 and 30 long, respectively. Legs as in female.

LARVA (based on description presented in Jack 1961, amended). Gnathosoma as in female. Idiosoma 200–300 long and 210–305 wide. Dorsum with 11 pairs of slightly serrate setae, 10–25 long, arranged as in Fig. 32A Eyes

present. Genital slit situated ventrally. Genital setae absent, only 2 pairs of pseudanal slightly serrate setae ps1 and ps2 present, about 20 long.

Type material (examined). One female lectotype, 2 female paralectotypes and 2 males ( NHM no.1966.2.22.303– 309) from Trapelus mutabilis Merrem (Sauria: Agamidae ) ( NHM no. 1955.1.1.43–45), LIBYA: Cyrenaica , 1 January 1955, coll. B. Macdonald.

Type material deposition. All types deposited in the NHM .

Non-type material (examined). Six females from Pseudotrapelus sinaitus (Heyden) , EGYPT: Sinai Peninsula, November 2014, coll. D. Melnikov.

Hosts and distributions. This species was recorded from Pseudotrapelus sinaitus from SW Saudi Arabia ( Jack 1961) [Al-Hejaz], Yemen [Hadhramaut], Egypt [Sinai Peninsula]; Trapelus mutabilis from Libya [Cyrenaica], Egypt [West Alexandria, Maryut District] ( Jack 1961) and Uromastyx ornata (new host) (present study) from Egypt (new locality) (present study).

Figures

FIGURE 32. Pterygosoma parasiniatum Fajfer, Melnikov and Dabert, 2016, larva. A, dorsal view; B, ventral view; C, gnathosoma in dorsal view (after Fajfer et al. 2016).

FIGURE 35. Pterygosoma sinaita Jack, 1961, female. A, dorsal view; B, ventral view; C, postero-lateral seta.

FIGURE 36. Pterygosoma sinaita Jack, 1961; details. A, gnathosoma of female in dorsal view; B, tarsus I of female in dorsal view; C, idiosoma of male in dorsal view.