(Figs. 207–209)
Philoxanthornea clarki Kivganov, 1995 (in Kivganov & Sharafat 1995): 87, fig. 5.
Type host: Sternula albifrons Pallas (Charadriiformes: Sternidae). Type locality: Ukraine.
FEMALE (6 specimens from additional host species— Sterna hirundo from Poland). Total body length 580–605. Gnathosoma. Infracapitulum and stylophore apunctate. Each medial branch of peritremes with 1 chamber, each lateral branch with 6–7 chambers. Movable cheliceral digit 105 long. Stylophore 130 long. Idiosoma. Propodonotal shield weakly sclerotized in anterior part. Propodonotal setae slightly ornamented. Length ratio of setae vi:ve:si 1:1.4–1.7:2–2.5. Bases of setae c1 and se located at same transverse level. Hysteronotal shield fused to pygidial shield, apunctate, bearing bases of setae d1, e2 and all terminal setae. Setae d2 slightly (1.2 times) longer than setae d1 and e2. Setae f2 about twice as long as f1 and h1. Setae h2 5–6 times longer than f2. Aggenital setae ag1 and ag3 subequal in length, both setae slightly (1.2 times) longer than ag2. All coxal fields apunctate. Setae 3c 1.5–1.8 times longer than 3b. Legs. Setae tc’III–IV about half as long as tc”III–IV. Fan-like setae p’ and p” of legs III and IV with 4–5 tines. Claws with basal angle. Lengths of setae: vi 25–30, ve 40–50, si 55–65, se 95–110, c1 115–130, c2 85–100, d1 30–40, d2 40–50, e2 35 –40, f1 20–25, f2 40–55, h1 20–25, h2 200–330, ps1 and ps2 20, ag1 160– 185, ag2 130, ag3 180–230, g1 and g2 20, l’RIII 30–40, l’RIV 30–40, tc’III–IV 30, tc”III–IV 60–70, 3b 40–50, 3c 70–75.
MALE (1 specimen from additional host species— Sterna hirundo from Poland). Total length 465. Gnathosoma. Infracapitulum apunctate. Each medial branch of peritremes with 1 chamber, each lateral branch with 6–7 chambers. Movable cheliceral digit 90 long. Stylophore apunctate, 115 long. Idiosoma. Propodonotal shield weakly sclerotized, margins indiscernible, punctate on whole surface. Length ratio of setae vi:ve:si 1:1.6:2.9. Hysteronotal shield weakly sclerotized, indiscernible in posterior part. Setae d2, e2 and d1 subequal in length. Setae h2 11 times longer than f2. Setae g1 situated anterior to level of setae g2. Setae ag1 1.7 times longer than ag2. All coxal fields weakly sclerotized, striae visible, sparsely punctate. Setae 3c twice as long as 3b. Legs. Setae tc’III–IV about half length of tc”III–IV. Fan-like setae p’ and p” of legs III and IV with 4–5 tines. Lengths of setae: vi 35; ve 55; si 100; se >105; c1 >100; c2 125; d1 20; d2 20; e2 20; f2 20; h2 225; ag1 85; ag2 50; l’RIII 30; l’RIV 25; tc’III–IV 25; tc”III–IV 50; 3b 35; 3c 70.
Type material (not examined). Sternula albifrons Pallas (Charadriiformes: Laridae); female holotype, 1 female paratype and 2 male paratypes; UKRAINE, Odessa Prov., Tiligulski liman, 30 June 1990, coll. D.A. Kivganov.
Type material deposition. Type material deposited in the OCU and was unavaiable for present study.
Non-type material examined. Sterna hirundo Linnaeus (Laridae): 9 females, 1 male, 6 nymphs and 2 larvae (AMU –SYR.89) (sec. cov.); POLAND, Zachodniopomorskie, Darlowko Wschodnie, April 2000, coll. M. Skoracki. Material deposited in the AMU. Larus canus Linnaeus (Laridae): 3 females (AVB 05–0715–026); RUSSIA, Kaliningrad, Kurish spit, Rybachiy village (55°09'15"N, 20°51'14"E), 11 May 1958, coll. V. Jugis. Material deposited in the ZISP.
Host range and habitat. Oligoxenous species inhabiting quills of secondaries and coverts of Sternula albifrons, Sterna hirundo (Sternidae) and Larus canus (Laridae).
Distribution. Poland, Ukraine and Russia.