Pterygosoma singularis Jack, 1961

Fajfer, Monika, 2020, A systematic revision of the scale mite genus Pterygosoma Peters, 1849 (Acariformes: Pterygosomatidae), Zootaxa 4805 (1), pp. 1-147 : 86-88

Pterygosoma singularis Jack, 1961 ( Figs 75 and 76 )

Pterygosoma singularis Jack, 1961: 247 , fig. 5

Type host: Agama agama (Sauria: Agamidae ). Type locality: Kenya (Kitui district). Redescription. FEMALE (based on 1 lectotype from Agama agama ). Gnathosoma . Chelicerae 220 long; swol- len cheliceral part 80 long, slender distal part 140 long. Fixed cheliceral digit with spinous process, 20 long. Setae dF and dG subequal in length, 60 long. Palpal tibia with short claw; palpal tarsi with 3 setae. Subcapitular setae n absent. Peritremes about 150 long. Hypostome about 190 long. Idiosoma 485 long and 800 wide. Dorsum. Anterolateral part with 86 pairs of plumose setae, 15–55 long. Medial part with 2 pairs of dorso-median setae: dm1 filiform, 45 long, dm2 apically expanded, 55 long. Peripheral series represented by 7 and 8 pairs of setae on right and left site on idiosoma , 75–105 long. Eyes absent. Venter with slightly serrate setae vm1–vm3. Genital slit situated ventrally. Genital series represented by 1 pair of spine-like conspicuous setae g1 40 long. Pseudanal series represented by 1 pair of setae ps, 50 long. Legs chaetotaxy as in melanum group i.e. setae of trochanters I–IV (1–1–1–1), femora I–IV (3–1–1–1), genua I–IV (2–1–0–0), tibiae I–IV (5–3–3–3). All setae on each podomere slightly serrate, except for serrate setae d’FI–IV. Setation of tarsi: I 11 setae (ft, tc’, tc”, p’, a’, a”, it’, it”, u’, u”, 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 tc’ of legs II–IV and setae a’, a”, u’, u”, vs’ of legs I–IV smooth.

Type material (examined). One female lectotype ( NHM no. 1966.2.22.849) from Agama agama (Linnaeus) (Sauria: Agmaidae) ( NHM no. 1902.5.26.4–6), KENYA: Kitui district, 26 May 1902, coll. S. L. Hinde.

Type material deposition. All types deposited in the NHM .

Host and distribution. This species is known only from Agama agama from Kenya [Kitui district] ( Jack 1961).

Remarks. According to the original description of the species ( Jack 1961) on tarsi I “two pairs of plumose setae behind the claw” are present whereas on Fig. 5c in the original species description only one pair of setae p is present. Moreover, in the examined specimen only one seta (p’) is present and setae dm1 are filiform (vs. slightly serrate in the original description) and 7–8 pairs of the peripheral setae are present (vs. 10 pairs).

Figures

FIGURE 5. Pterygosoma pallidum Fajfer, Melnikov and Dabert, 2016, female in ventral view (after Fajfer et al. 2016, modified).

FIGURE 75. Pterygosoma singularis Jack, 1961, female. A, dorsal view; B, dorso-median seta dm1; C, anterior seta; D, lateral seta.

FIGURE 76. Pterygosoma singularis Jack, 1961, female. A, ventral view; B, gnathosoma in dorsal view.