Pterygosoma garissi, Fajfer, 2013

Fajfer, Monika, 2013, Two new species of scale mites (Acari: Pterygosomatidae) parasitizing Agama agama (Sauria: Agamidae) from Kenya, Zootaxa 3745 (2), pp. 257-262 : 258-260

Pterygosoma garissi sp. nov.

( Figs. 1–2 )

Description. FEMALE (holotype, Fig. 1 ). Gnatosoma situated terminally. Cheliceral base 85 (75–85 in 3 paratypes) long, cheliceral shaft 145 (135–145) long. Fixed cheliceral digit 15 long, with several tines. Movable cheliceral digit with basal spur. Palpal femur and genu with smooth setae, 65 and 75 long, respectively. Palpal tibia with 3 simple setae and short claw; palpal tarsi with 4 smooth setae. Subcapitulum with smooth setae n, 10 long. Free lateral part of peritremal branch about 25 long. Hypostome 150 long, with smooth roughly triangular apex. Idiosoma 595 long (530–635) and 1230 wide (1160–1230). Dorsum ( Fig. 1A ) with 3 group of serrated setae: 53–67 pairs of antero-lateral setae, 30–55 long; 2 pairs of postero-lateral setae, 70–80 long, and 2 pairs of dorso-median setae dm1–dm2, about 40 long. Peripheral series represented 8–9 pairs of slightly apically expanded setae, 300–385 long; 5 pairs located medially, 3–4 pairs laterally. Eyes absent. Venter ( Fig. 1B ) with 3 pairs of ventro-median setae: vm1 filiform, vm2–vm3 serrated. Genital slit situated mainly ventrally. Genital series represented by 3 pairs of spin-like setae g1–g3, 30, 5 and 10 long, respectively. Pseudoanal setal series represented by 4 pairs of paddleshaped setae, 95–130 long, with minute spicules on apical margin (in two paratypes assymetrical duplication of additional seta ps observed). Legs. Coxal setation: 1a, 1b, 2b, 3a, 3b arranged in formula 2–1–2–0, all setae filiform; setae of trochanters I–IV (1–1–1–1), femora I–IV (3–1–1–1), genua I–IV (2–0–0–1), tibiae I–IV (5–3–3– 3). All setae on each segment filiform, except for slightly serrated setae d’FI and l’FIII–FIV. Setation of 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”, it’, it”, u’, u”, vs’) and ω1; III and IV with 8 setae each (tc’, p’, p”, it’, it”, u’, u”, vs’). Setae tc’, tc”, a’, a” of leg I represented by euphatidia, p’ and p” fan-like. Setae tc’ of legs II–IV, setae it’, it”, u’, u” of legs I–IV and setae vs’ of legs I smooth, setae vs’ of legs II slightly serrated and vs’ of legs III–IV serrated.

Type material. Female holotype and 2 female paratypes from Agama agama (Linnaeus) ( ZMUC R3619 ) [tail], KENYA: Garissa County, 26 January 1937, coll. B. Benzen ; 1 female paratype from same host ( ZMUC – 3667) [ventral surface], KENYA: Garissa County, Bura Tana; 20–24 October 1947, coll. Ahlefeldt and Jacobsen.

Type deposition. Holotype in ZMUC, 2 female paratypes in AMU, 1 female paratype in ZISP.

Etymology. This species is named from the place of its type locality.

Differential diagnosis. P. garissi sp. nov. is similar to P. annectans Jack, 1962 ex Acanthocercus annectens (Blanford) from Somaliland and Agama lionotus Boulenger ( Squamata : Agamidae ) from Kenya ( Jack 1962). In females of both species, the cheliceral shaft is longer than the cheliceral base, the dorsal setation pattern of the idiosoma is very similar, the anterior mid-dorsal setae are serrated, setae dG are longer than dF, leg setation is the same, except for femora and trochanters I–IV, setae ps1–2 are paddle-shaped with minute spicules on the apical part. This new species differs from P. annectans by the following features. In females of P. garrisi the peripheral setae are slightly apically expanded, three pairs of setae are situated on the coxal fields I and two pairs on the coxal fields II, setae dFIV are absent and lTrIV present, all pseudoanal setae are paddle-shaped with minute spicules on the apical part. In females of P. annectans , the peripheral setae are fine-pointed, four pairs of setae are situated on the anterior coxal field and three pairs on the posterior coxal field, setae dFIV are present, setae lTrIV absent, pseudoanal setae ps3 are blunt-pointed and ps4 are fine-pointed.

Figures

FIGURE 1. Pterygosoma garissi sp. nov., female, A, dorsal view; B, ventral view.

FIGURE 2. Pterygosoma garissi sp. nov., female; details. A, gnatosoma in dorsal view; B tarsus I in ventro-lateral view; C, tarsus II in lateral view.