Philodromus xerophilus, Szita & Logunov & O, 2008

Szita, É., Logunov, D. & O, P., 2008, A Review Of The Histrio Group Of The Spider Genus Philodromus Walckenaer, 1826 (Araneae, Philodromidae) Of The Eastern Palaearctic Region, Acta Zoologica Academiae Scientiarum Hungaricae 54 (1), pp. 23-73 : 38-40

Philodromus xerophilus sp. n.

(Figs 10–11, 20–21, 69, Map 2)

Type material: The m holotype ( ZMMU) from Russia, Tuva, Erzin Distr., slopes of Onchalaan [=Ondzhilan] Mt., c. 16.5 km W of Erzin, c. 50°16’N, 94°55’E, sandy plots, 1200–1300 m a.s.l., D. V. Logunov , earlier det. as P. histrio , 28/05/1989. PARATYPES: together with the holotype , ZMMU – 1 f; Pii-Khem Distr. , Uyuk River mouth, c. 52°04’30”N, 94°21’20”E, sloping steppe, 670–700 m a.s.l. , D. V. Logunov , earlier det. as P. histrio , 25/05/1989 , ZMMU – 1 m 1 f.

Other material examined: RUSSIA: Tuva: Pii-Khem Distr., SE foothills of Uyuk Mt. Range, Seserlig River valley , SE vicinities of Seserlig , c. 51°52’20”N, 94°16’E, 920–960 m a.s.l., D. V. Logunov, SZMN – 2/05/1990 , 1 m; same distr., Uyuk River mouth, c. 52°04’30”N, 94°21’20”E, D. V. Logunov & Yu. M. Marusik, 3–5/06/1995 , 5 f; Ulug-Khem Distr. , c. 10–15 km SW of Shagonar, c. 51°27’30”N, 92°47’20”E, 560–580 m a.s.l., D. V. Logunov, earlier det. as P. histrio, SZMN – 8/05/1990 , 1 m 8 f; Ulug-Khem Distr., N slope of East Tannu-Ola Mt. Range, c. 8 km S of Torgalyg, Torgalyg River canyon, c. 51°14’30”N, 92°49’50”E, c. 1000 m a.s.l., D. V. Logunov, earlier det. as P. histrio, SZMN – 9/05/1990 , 1 m; Kyzyl Distr., Verkhnii Enisei [=Verkhnii Yenisey, Ulug-Khem] River valley , left riverside, 6–7 km WSW of Kyzyl, c. 51°40’25”N, 94°17’30”E, 610–620 m a.s.l., D. V. Logunov, SZMN – 29/05/1989 , 3 f; Ovyurskii Distr., S foothills of East Tannu-Ola Mt. Range, Irbitei River valley , c. 13 km WNW of Ak-Chyraa [=Ak-Chira], 50°44’20”N, 93°08’30”E, 960–1000 m a.s.l., S. Koponen, ZMTU – 14/06/1995 , 1 m; Tes-Khem Distr., S slope of East Tannu-Ola Mt. Range, c. 4.5 km E of Khol’ -Oozhu [=Khol’-Ozhu], Aryskannyg-Khem River canyon, c. 50°45’N, 94°29’E, c. 1200 m a.s.l., D. V. Logunov & Yu. M. Marusik, SZMN – 15–16/07/1993 , 1 f, 16–18/06/1995, 1 f; Erzin Distr, slopes of Onchalaan [=Ondzhilan] Mt. , c. 16.5 km W of Erzin, c. 50°16’N, 94°55’E, 1200–1300 m a.s.l., Yu. M. Marusik, SZMN – 7–10/06/1995 , 1 m; Erzin Distr., Tes-Khem River valley , 3–5 km S of Erzin, c. 50°13’10”N, 95°09’20”E, c. 1100 m a.s.l., D. V. Logunov, earlier det. as P. histrio, SZMN – 14/08/1989, 1 f. Buryatia: Zaigraevo Distr., Uda River valley, S foothills of Ulan-Burgasy Mt. Range , c. 40 km ENE of Ulan-Ude, c. 51°57’N, 108°03’E, 600–680 m a.s.l., S. N. Danilov, SZMN – 26/05/1990, 2 f. Chita Region: Tsasuchei Distr., Onon River valley , right riverside, nr. Kubukhai , c. 50°29’40”N, 114°48’20”E, 630–660 m a.s.l., S. N. Danilov, SZMN – 26/06/1984 , 1 f; Tsasuchei Distr., the right bank of Onon River, nr. Nizhnii- Tsasuchei , c. 50°30’30”N, 115°08’E, 610–670 m a.s.l., V. V. Dubatolov, R. Yu. Dudko, I. I. Lyubechanski & V. Smirnova, SZMN – 1–2/06/1995 , 2 m 2 f; Dahurian Reserve, Kuku-Khadan Mt., N shore of Zun-Torei Lake , c. 50°08’30”N, 115°53’50”E, 600–745 m a.s.l., R. Yu. Dudko, SZMN – 8–13/06/1995, 1 f. – KAZAKHSTAN: Almaty [=Alma-Ata] Area, Kerbulak Distr., c. 37 km SSW of Konyrolen, S slope of Aktau Mt. Range , c. 43°57’20”N, 79°04’30”E, 640–680 m a.s.l., A. A. Zyuzin, SZMN – 07/05/1992, 3 f.

Diagnosis: Embolus thin, stilleto-shaped. PTA with a single peak directed mediad. CD thin, subequal, narrowing posteriorly. SO in the lateral position.

Male (the holo- and paratypes): Prosoma reddish yellow, with the reddish brown and sandy pattern. Opisthosoma sandy coloured, with dark brown and greyish brown pattern ( Fig. 69 ). Legs reddish yellow, gently dotted and with longitudinal darker stripes. Measurements (n = 2). Body length 4.45–5.45. PsL 1.85–2.2, PsW 1.75–2.05, OsL 2.6–3.25, OsW 1.5–2.15. Distances between eyes: AME 0.09–0.10, ALE 0.08–0.09, PME 0.07–0.08, PLE 0.08, AME-AME 0.11–0.13, AME-ALE 0.07–0.09, PME-PME 0.25–0.27, PME-PLE 0.18–0.19, MOA-AW 0.29–0.30, MOA-PW 0.38–0.41, MOA-L 0.38–0.40, AME-PME 0.22–0.25, ALE-PLE 0.19–0.20. Length of leg segments: FeI 3.2, PaI 1.15, TiI 2.95, MtI 2.25, TaI 1.2, FeII 4.3–4.5, PaII 1.4–1.5, TiII 4.05–4.35, MtII 3.45–3.5, TaII 2–2.1, FeIII 2.8–3.1, PaIII 0.9–1, TiIII 2.2–2.3, MtIII 1.85–1.9, TaIII 1.2–1.4, FeIV 3.45–3.85, PaIV 1.05–1.4, TiIV 2.65–3, MtIV 2.3–2.48, TaIV 1.35–1.4. Total length of legs: legI 10.75, legII 15.3–15.85, legIII 9–9.65, legIV 10.98–11.95. Spination of leg I: femur: d 0–0–1–0–1; pl 0–1–0–1–0; v -; rl -. tibia: d 0–0–1; pl 0–1–0–1–0; v 2–0–2–0–0ap; rl 0–1–0–1–0. metatarsus: d -; pl 1–1–0–0–1; v 2–1–1–0–0ap; rl 1–1–0–0–1.

Palpus (Figs 10–12). CyL 0.85–1.02, CyW 0.38–0.46, PTiL. 0.35–0.42. Embolus slender and slightly curved. The ventral half of PTA poorly sclerotised, like a short lobe; the distal edge overhangs the alveolus and has a retrolateral sharp projection bent ventrad. The ST is not seen in ventral view. The VTA triangular in ventral view, rod-like in retrolateral view, with a fine tip. The RTA poorly marked, small and rounded.

Female (the paratypes): Colouration and colour pattern as in males ( Fig. 69 ). Measurements (n= 2). Body length 5.25–6.25. PsL 1.75–2.45, PsW 1.7–2.3, OsL 3.5–3.8, OsW 2.4–2.65. Distances between eyes: AME 0.09–0.11, ALE 0.08–0.10, PME 0.08–0.09, PLE 0.08–0.10, AME-AME 0.12–0.15, AME-ALE 0.08–0.10, PME-PME 0.24–0.29, PME-PLE 0.18–0.22, MOA-AW 0.27–0.33, MOA-PW 0.36–0.46, MOA-L 0.35–0.42, AME-PME 0.22–0.25, ALE-PLE 0.17–0.18. Length of leg segments: FeI 2.65–3.9, PaI 1.1–1.5, TiI 2.3–3.28, MtI 1.9–2.73, TaI 1.2–1.75, FeII 3.63–5.1, PaII 1.2–1.7, TiII 3.3–4.65, MtII 2.65–3.75, TaII 1.55–2.1, FeIII 2.2–3.5, PaIII 0.85–1.15, TiIII 1.8–2.55, MtIII 1.55–2, TaIII 1.05–1.33, FeIV 2.65–4.1, PaIV 0.9–1.3, TiIV 2.25–3.23, MtIV 1.95–2.6, TaIV 1.05–1.5. Total length of legs: legI 9.15–13.15, legII 12.33–17.3, legIII 7.45–10.53, legIV 8.8–12.73. Spination of leg I: femur: d 0–0–1–0–1 or 0–0–1–1–1; pl 0–1–0–1–0; v -; rl -. tibia: d 0–0–1; pl 0–1–0–1–0; v 2–0–2–0–0ap; rl 0–1–0–1–0. metatarsus: d -; pl 1–1–0–0–1; v 2–1–1–0–0ap; rl 1–1–0–0–1.

Epigyne and spermathecae ( Figs 20–21 ). The CD wide, slightly widened in the middle and concaved anteriorly and posteriorly. Two EA well-marked, keyhole-shaped, subparallel; their anterior parts clearly visible in ventral view. The S wider anteriorly, The ID as a wide lobe-like structure in medio-posterior position, the SO laterally of it.

Remarks: This species is most similar to P. histrio and P. ablegminus . Males can be distinguished by the stiletto-shaped embolus (cf. Figs 10 & 4, 7) and by the shape of the PTA, of which tooth is directed mediad (laterad in P. ablegminus , and with two teeth in P. histrio ) (cf. Figs 11 & 5, 8). The females of P. xerophilus can be easily distinguished by the position of the SOs (in the lateral position; in the median position in P. histrio and P. ablegminus ) ( Figs 17, 19, 21 ). Besides, the CD of P. xerophilus is much narrower than those of the related species (cf. Figs 20 & 16, 18 ).

Habitat: Various (semi)arid habitats. Tuva: the saz ( Achnatherium splendens ) steppe, sloping stony shrub steppe, dry shurb-grass ( Caragana -Stipa-Artemisia) steppe, dry nanophanerophyte steppe, with Nanophyton erinaceus ( LOGUNOV et al. 1998, MARUSIK et al. 2000, both sub P. histrio , present data). Elevations: 550–1350 m a.s.l.

Distribution: The species is known from the mountains of South Siberia (Buryatia, Chita Region, Tuva) and from NE Kazakhstan; for the collection localities see Map 2. Earlier, this species was reported from Tuva ( LOGUNOV et al. 1998, MARUSIK et al. 2000) and Buryatia (DANILOV 1999) under the name of P. histrio (see above).

Etymology: The species was named after its preferred habitat, based on the Greek words

‘ξηρος’ dry and ‘ϕιλια’ – friendship.

Figures

Figs 67–80. Body patterns of Philodromus spp. 67 = P. histrio f, 68 = P. ablegminus f, 69 = P. xerophilus f, 70 = P. lanchowensis m, 71 = P. alascensis m, 72 = ditto f, 73 = P. tuvinensis m, 74 = ditto f, 75 = P. mysticus f, 76 = P. timidus m, 77 = P. xinjiangensis m, 78 = P. fallax m, 79 = P.

Figs 16–23. Female genitalia of Philodromus spp. 16–17 = P. histrio – 16 = epigyne, 17 = spermathecae.18–19 = P. ablegminus – 18 = epigyne, 19 = spermathecae.20–21 = P. xerophilus – 20 = epigyne, 21 = spermathecae. 22–23 = P. lanchowensis – 22 = epigyne, 23 = spermathecae. Scale bar = 0.1 mm. Specimens: P. histrio: N Kazakhstan Region, Bol’shaya-Malyshka; P. ablegminus: the paratype from Kazakhstan, Kapchagai Canyon; P. xerophilus: the paratype from Tuva, Onchalaan Mt.; P. lanchowensis: Buryatia, Ulan-Ude