Pterygosoma engai Fajfer, 2013

Fajfer, Monika, 2020, A systematic revision of the scale mite genus Pterygosoma Peters, 1849 (Acariformes: Pterygosomatidae), Zootaxa 4805 (1), pp. 1-147 : 104-108

publication ID	https://doi.org/ 10.11646/zootaxa.4805.1.1
publication LSID	lsid:zoobank.org:pub:FC40DD5D-0408-4299-9B96-6E318D10035F
persistent identifier	https://treatment.plazi.org/id/03AF2A23-FF9D-F853-FF51-D3AEFB4BFE05
treatment provided by	Plazi
scientific name	Pterygosoma engai Fajfer, 2013
status

Treatment

Pterygosoma engai Fajfer, 2013 ( Fig. 94–97 View FIGURE 94 View FIGURE 95 View FIGURE 96 View FIGURE 97 )

Pterygosoma engai Fajfer, 2013: 272 , figs 1–4, 9A

Type host: Agama sankaranica (Sauria: Agamidae ). Type locality: Nigeria (Idanre).

Diagnosis. FEMALE. Gnathosoma about 170 long. Slender cheliceral part 1.3 times longer than swollen cheliceral part. Fixed cheliceral digit with numerous apical tines. Setae dF slightly shorter than setae dG. Palpal tibia with short claw; palpal tarsi with 3 setae. Subcapitulum with filiform setae n. Hypostome with small denticles present at apex. Idiosoma 515–945 long and 965 wide. Dorsum with 3 groups of flattened paddle-shaped setae with minute spicules on apical part: 19–26 pairs of antero-lateral short setae; 3 pairs of dorso-median setae dm1–dm3 and 2–3 pairs of longer postero-lateral setae. Eyes absent. Venter. Setae vm1 filiform, vm2 and vm3 paddle-shaped with minute spicules on apical margin. Genital slit situated dorsally. Genital series represented by 3 pairs of spine-like setae g1–g3. Setae g1 most conspicuous, g2 and g3 minute. Pseudanal series represented by 3 pairs of paddle-shaped setae with spicules on apical margin. Legs chaetotaxy as in inermis group ( Tab. 1). All setae on each podomere filiform, except for slightly plumose setae d’FI–IV. Setation of tarsi as in group A ( Tab. 2). Setae tc’ of legs II–IV and setae a’, a”, u’, u”, vs ’, vs” of legs I–IV smooth.

DEUTONYMPH. Gnathosoma as in female. Idiosoma 250–360 long and 500–555 wide. Dorsum. Anterior part with 19–25 pairs of paddle-shaped setae with minute spines on apical margin. Dorso-median setae represented by 3 pairs of paddle-shaped setae dm1–dm3. Postero-lateral parts of idiosoma with 2 blunt-ended weakly apically serrate setae. Venter as in female. Genital series represented by 1 pair of spine-like setae g1 and 3 pairs of paddle-shaped setae ps. Legs as in female.

NYMPH CHRYSALIS. Gnathosoma barely discernible. Idiosoma 270–285 long and 485–510 wide. Idiosomal dorsum and idiosomal venter without setae. Legs. Coxal fields I–II and trochanters I–IV present. Setal alveoli of setae ps present.

PROTONYMPH. Gnathosoma . Swollen cheliceral part 80 long, slender cheliceral part 115 long. Fixed cheliceral digit 10 long with numerous apical tines. Palpal femur and genu with smooth setae dF and dG, 55 and 45 long, respectively. Palpal tibia short claw. Palpal tarsi with 3 smooth setae. Subcapitular seta n absent. Peritremes 125 long. Hypostome with small denticles present at apex. Idiosoma 345 long and 445 wide. Dorsum with 3 groupings of flattened paddle-shaped setae with minute spicules on apical part: 26 and 28 pairs of antero-lateral setae, 25−55 long, on right and left side of idiosomal dorsum, respectively; 3 pairs of dorso-median setae dm1–dm3 30, 90, 105 long, respectively and 2 pairs of postero-lateral setae, 160−180 long. Eyes absent. Venter with 3 pairs of ventro-median setae: vm1 filiform, vm2–vm3 paddle-shaped with minute spicules on apical margin. Genital slit situated terminally. Genital setal series represented by 3 pairs of spin-like setae g1–g3; setae g1 20 long, g2–3 minute (5–10 long). Pseudanal setal series represented by 3 pairs of paddle-shaped setae, 55–70 long, with spicules on apical margin. Legs as inermis group ( Table 1).

Type material (examined). Female holotype and 10 female, 4 deutonymph and 2 nymph chrysalis paratypes from Agama sankaranica (Chabanaud) (Sauria: Agamidae ) (ZMUC–R36435), NIGERIA: Ondo State, Idanre; 18–21 August 1958, coll. Schiøtz and Volsøe.

Non-type material (examined). Protonymph from Agama sankaranica (Chabanaud) ( ZMUC R36425) [tympanum], NIGERIA: Ondo State, Idanre ; 18–21 August 1958, coll. Schiøtz and Volsøe.

Type material deposition. Holotype, 4 female, 2 deutonymph and 1 nymph chrysalis paratypes in the ZMUC; 3 female, 2 deutonymphs and 1 nymph chrysalis paratypes in the AMU; 3 female paratypes in the ZISP.

Non- type material deposition. One protonymph in the AMU (AMU–PTE7.1) .

Host and distribution. This species is known only from Agama sankaranica from Nigeria [Ondo State, Idanre] ( Fajfer 2013a).

Remarks. In the original description of this species setae a’ and a” of tarsi I are marked incorrectly as eupathidia and it’ and it” of tarsi I as simple setae ( Fajfer 2013a) whereas the re-examination of females of P. engai shows that setae a’ and a ” are simple, and setae it’ and it ” of tarsi I are in form of eupathidia.