Pterygosoma mutabilis Jack 1961
Creators: name: Fajfer, Monika
Publisher: name: Zenodo
Year: 2020
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Arachnida
Prostigmata
Pterygosomatidae
Pterygosoma
Pterygosoma mutabilis

description: Pterygosoma mutabilis Jack, 1961 (Figs 1–3)   
 Pterygosoma mutabilis Jack, 1961: 245, fig. 4   
 Pterygosoma hoogstraali Mostafa, 1974: 98, figs 10−13   
 Pterygosoma rhipidostichata Bertrand, Finkelman and Paperna, 2000: 280, figs 14−18 syn. n.   
 Type host: Trapelus mutabilis (Sauria: Agamidae). Type locality: Libya (Jabal al Gharbi district, Gabel-as-Soda).   
 Redescription. FEMALE (based on lectotype and 2 paralectotypes from Trapelus mutabilis and 5 non-type specimens from T. mutabilis and T. jayakari). Gnathosoma. Chelicerae 220–235 long; basal swollen part 95–105 long, slender distal part 125–140 long. Fixed cheliceral digit 15–20 long, with 3–4 minute tines. Setae dF and dG 40–50 and 45–55 long, respectively (setae dG always slightly longer than dF). Palpal tibial with short claw. Palpal tarsi with 3 setae. Subcapitulum with filiform setae n, 15–20 long. Peritremes 155–170 long. Hypostome 170–185 long, with smooth apex. Idiosoma 630–370 long and 1015–1105 wide. Dorsum.Antero-lateral part with 80–90 pairs of slightly serrate setae, 30–125 long; medial part with 2 pairs of smooth or with barely discernible serration setae dm1 and dm2 subequal in length, 60–65 long. Peripheral series represented by 18–25 pairs of setae, 170–205 long, inserted in 2 rows: dorsal row with 4 pairs of setae and terminal row with 14–21 pairs of setae. Eyes absent. Venter with 3 pairs of ventro-median setae: vm1 filiform, vm2 and vm3 smooth. Genital slit situated terminally. Genital series represented by spine-like setae g1–g3. Setae g1 and g2 15–20 long, g3 thick and about 30 long. Pseudanal series represented by 6–9 pairs of tapered or slightly apically expanded setae ps, 100–150 long. Setae ps1–ps3 situated dorsally, ps4 terminally, ps5–ps9 dorsally. Legs chaetotaxy as in mutabilis group i.e. setae of trochanters I–IV (1–1–1–1), femora I–IV (3–1–1–1), genua I–IV (3–0–0–1), tibiae I–IV (5–3–3–3). All setae on each podomere smooth, setae d’FI–IV with barely discernible serration. 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” of leg I, tc’ of legs II–IV and a’, a”, u’, u”, vs’, vs” of legs I–IV smooth.   
 MALE (based on Jack 1961, amended). Gnathosoma as in female. Idiosoma 200–260 long and 485–510 wide. Dorsum with 3 groups of serrate setae: about 40 pairs of anterior serrate setae, 10–20 long; 3 pairs of dorso-median serrate setae dm1–dm3 about 45, 30 and 25 long, respectively; and 12–14 pairs of stout, smooth and blunt-pointed peripheral setae, 65–90 long. Eyes present. Aedeagus about 120 long, directed forward; genito-anal opening with 1 pair of filiform setae situated anteriorly. Venter. Setae vm1–vm3 as in female. Legs as in female.   
 PROTONYMPH (based on Jack 1961, amended). Gnathosoma as in female. Idiosoma 395 long and 675 wide. Dorsum with about 40 pairs of antero-lateral serrate setae and 22 pairs of smooth blunt-pointed peripheral setae. Eyes present. Venter as in female. Genital setae absent. Pseudanal series represented by 4 pairs of stout and blunt serrate setae. Legs as in female.   
 Type material (examined). One female lectotype and 2 female paralectotypes (NHM no. 1966.2.22.642–644) from Trapelus mutabilis Merrem (NHM no. 1954.1.5.68–69), LIBYA, Jabal al Gharbi district, Gabel-as-Soda, coll. K. M. Guicjard.   
 Non-type material (examined). Two females (NHM no. 1966.2.22.645–654) from same host (NHM no. 1897.10.28.162–164), EGYPT: Alexandria Province, near lake Marjut, 28 October 1897, coll. J. Anderson; 1 female (NHM no. 1966.2.22.663–669) from Trapelus jayakari (Anderson) (Sauria: Agamidae) (NHM no. 1931.7.16.42– 43), QATAR, 5 March 1931, coll. B. Thomas; 2 females (NHM no. 1966.2.22.632–642) from same host species (NHM no. 1931.7.16.42–43b) and location, 5 March 1931, coll. B. Thomas.   
 Type material deposition. All specimens deposited in the NHM.   
 Hosts and distribution. This species was recorded from Trapelus mutabilis from Libya [Jabal al Gharbi district, Gabel-as-Soda] (Jack 1961), Egypt [near Suez canal and Alexandria Province near lake Marjut], Israel [Negev Desert Shivta] (Jack 1961; Bertrand et al. 2000) and Trapelus jayakari from Qatar (Jack 1961).   
 Remarks. I synonymized Pterygosoma rhipidostichata Bertrand, Finkelman and Paperna, 2000 with previously described species i.e. Pterygosoma mutabilis Jack, 1961. In Bertrand et al. (2000) the authors stated that the only clear differences between their species and P. mutabilis are: flattened and expanded peripheral setae, the chaetotaxy of genu I and gnathosoma which is one third of the mite’s idiosoma length and is recessed into ventral side. However, the re-examination of type specimens of P. rhipidostichata and P. mutabilis shows that there are no clear differences between them and the Figures 18–22 of P. rhipidostichata in Bertrand et al. (2000) are misleading.
description: Published as part of Fajfer, Monika, 2020, A systematic revision of the scale mite genus Pterygosoma Peters, 1849 (Acariformes: Pterygosomatidae), pp. 1-147 in Zootaxa 4805 (1) on pages 8-11, DOI: 10.11646/zootaxa.4805.1.1, http://zenodo.org/record/3927100