Philodromus lanchowensis SCHENKEL 1936
Creators: name: Szita, É.
name: Logunov, D.
name: O, P.
Publisher: name: Zenodo
Year: 2008
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Arachnida
Araneae
Philodromidae
Philodromus
Philodromus lanchowensis

description: Philodromus lanchowensis SCHENKEL, 1936   (Figs 13–15, 22–23, 70; Map 7)  
 Philodromus lanchowensis SCHENKEL, 1936: 280, fig. 94 (D f; the f holotype in SMNH; examined).   
Type material: The f holotype (SMNH) from China, Kansu [= Gansu, Ganxu] Prov., Lanzhou Prefecture, Huang He [=Yellow] River valley, Lanchow [=Lanzhou], c. 36°03’30”N, 103°47’E, 1500–1600 m a.s.l., G. Söderbom, – 27/04/1928.  
 Other material examined: Material: RUSSIA: Tomsk Area: Kargasok Distr., Vasyugan River valley, nr. Maisk, c. 57°48’40”N, 77°13’E, 90–100 m a.s.l., I. Sokolov, PSU – 3–5/06/1927, 2 f. Tuva: ‘ Zukuam’, PSU – 1 f; Chaatyg River, S. N. Danilov, earlier det. as P. alascensis, SZMN – 8/05/1990, 1 f; 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., O. V. Lyakhov, SZMN – 19–22/05/1990, 2 f. Buryatia: Ulan-Ude, the left bank of Selenga [=Selenge] River, c. 51°50’10”N, 107°33’50”E, c. 500 m a.s.l., S. N. Danilov, earlier det. as P. alascensis, SZMN – 05/1989, 1 f; Ulan-Ude Distr., Ulan-Ude, c. 51°50’N, 107°35’E, 500–700 m a.s.l., S. N. Danilov, ZMMU – 12/09/1992, 1 m; same locality, S. N. Danilov, earlier det. as P. alascensis, ZMMU – 12/06/1983, 1 f; Selenga [=Selenge] Distr., NE of Zhirim, S. N. Danilov, earlier det. as P. alascensis, SZMN – 18/05/1983, 1 f; c. 40 km SW of Ulan Ude, Bryanka River, nr. Iva, S. N. Danilov, ZMMU – 9/06/1990, 1 f. Amur Region: Arkhara Distr., Kundurka River valley, Kundur, c. 49°06’N, 130°45’E, 160–200 m a.s.l., A. Streltsov & E. Malikova, SZMN – 1/08/1996, 1 f. Khabarovsk Territory: Komsomol’sk-na-Amure Distr., no exact locality, Tereshko, PSU – 17/05/1987, 1 m; Baturinka – 21/05/1987, 1 f. Maritime Territory: Khasan Distr., Kedrovaya Pad’ Reserve, Kedrovaya River valley, c. 43°05’30”N, 131°33’40”E, 40–80 m a.s.l., B. P. Zakharov, SZMN – 7/03/1976, 1 f. – CHINA: Qinghai Prov., Haidong Prefecture, Ledu [=Nianbai] Co., Qilian Shan [=Nan Shan] Mts., SW foothills of Dabang Shan Mt. Range, Sining He [=Xining, Huang Shui] River valley, left riverside, Lan-wha-sja [=Lowacheng, Laoyacheng], c. 36°25’20”N, 102°39’E, c. 1920 m a.s.l., G. N. Potanin, MNHN – 19/04/1885, 1 f.   
Diagnosis: PTA proboscis-shaped. RTA thick, with a rounded tip. EA heart-shaped. Spermathecae thick, S-shaped.  
 Male (Buryatia: Ulan-Ude): Colour pattern as in females. Measurements (n= 1). Body length 4.65. PsL 2.15, PsW 2.3, OsL 2.5, OsW 1.75. Distances between eyes: AME 0.08, ALE 0.07, PME 0.07, PLE 0.07, AME-AME 0.14, AME-ALE 0.07, PME-PME 0.29, PME-PLE 0.17, MOA-AW 0.32, MOA-PW 0.43, MOA-L 0.34, AME-PME 0.24, ALE-PLE 0.14. Length of leg segments: FeI 3.35, PaI 1.35, TiI 3.25, MtI 3.15, TaI 1.95, FeII 3.93, PaII 1.4, TiII 3.95, MtII 3.7, TaII 2.25, FeIII 3.2, PaIII 1.15, TiIII 2.6, MtIII 2.75, TaIII 1.55, FeIV 3.15, PaIV 1.05, TiIV 2.65, MtIV 2.7, TaIV 1.5. Total length of legs: legI 13.05, legII 15.23, legIII 11.25, legIV 11.05. Spination of leg I: femur: d 0–1–1–0–1; pl 0–0–1–1–1; v -; rl 0–0–1–1–1. tibia: d 1–0–1–1–0; pl 1–1–0–1–0; v 2–2–0–2ap; rl 1–1–0–1–0. metatarsus: d -; pl 1–1–0–0–1; v 2–1–1–0–0; rl 1–1–0–0–1.   
Palpus (Figs 13–15). CyL 0.98, CyW 0.46, PTiL. 0.41. Embolus wide basally, with a concave at about two-thirds of its length, with a sharp tip. The PTA robust, proboscis-shaped. The ST is poorly visible in ventral view. The VTA poorly sclerotized. Both VTA and RTA with obtuse tips, joint each other (seen in retrolateral view).  
 Female (Buryatia: Ulan-Ude and Iva): Colour pattern as in Fig. 70. Measurements (n= 2). Body length 4.95–5.85. PsL 1.95–2.2, PsW 1.95–2.15, OsL 3–3.65, OsW 1.75–2.4. Distances between eyes: AME 0.08–0.09, ALE 0.08, PME 0.07–0.08, PLE 0.08, AME-AME 0.14, AME-ALE 0.06, PME-PME 0.25–0.27, PME-PLE 0.15–0.18, MOA-AW 0.31, MOA-PW 0.39–0.55, MOA-L 0.35–0.39, AME-PME 0.21–0.23, ALE-PLE 0.13–0.20. Length of leg segments: FeI 2.65–2.8, PaI 0.95–1.08, TiI 2.45–2.5, MtI 2–2.1, TaI 1.33–1.4, FeII 3.1–3.1, PaII 1.15–1.23, TiII 2.75–2.85, MtII 2.4–2.45, TaII 1.45–1.6, FeIII 2.45–2.7, PaIII 0.95–1.1, TiIII 1.95–2.08, MtIII 1.7–1.75, TaIII 1.2–1.25, FeIV 2.45–2.85, PaIV 0.9–1.1, TiIV 2.05–2.15, MtIV 1.85–1.95, TaIV 1.05–1.15. Total length of legs: legI 9.43–9.83, legII 10.85–11.23, legIII 8.3–8.83, legIV 8.4–9.1. Spination of leg I: femur: d 0–0–1–0–1; pl 0–1–0–1–1; v -; rl 0–0–1–0–1 or 0–0–0–0–1. tibia: d 1–0–1–1–0; pl 1–1–0–1–0; v 2–0–2–0–2ap; rl 1–1–0–1–0. metatarsus: d -; pl 1–1–0–0–1; v 2–1–1–0–0ap; rl 1–1–0–0–1.   
Epigyne and spermathecae (Figs 22–23). The CD narrow, slightly widening anteriorly (handle-shaped), its middle part with a saddle-like concave. The EA heart-shaped. The S ovoid. The ID as robust sack-like structures, visibly bent laterally.  
 Remarks: The structure of male and female copulatory organs of P. lanchowensis is somewhat similar to those of P. histrio, P. ablegminus and P. xerophilus. The male is easily recognisable by the proboscis-shaped PTA (Fig. 13) and by the thicker and stronger RTA (Fig. 14). The female differs in having the heart-shaped EA, the well-marked epigynal sutures (Fig. 22) and the thick, S-shaped spermathecae and SO (Fig. 23).   
 Habitat: Tuva and Buryatia: shrubby steppe, birch-poplar and pine forests (present data), larch forest (DANILOV, 1995: sub P. alascensis). Elevations: 40–1600 m a.s.l.   
Distribution: The Siberio-Far Eastern subboreal range; known from Tomsk Region in the west to Maritime Territory in the east (present data). For collecting localities see Map 7.  
 This species was hitherto reported from Buryatia under the name P. alascensis (DANILOV 1995, 1999). It is very likely that the undetermined Philodromus species reported from Japan by YAGINUMA (1986: fig. 11) and CHIKUNI (1989: 136, fig. 12) is actually P. lanchowensis. As we have been unable to re-examine any comparative material from Japan, the matter needs further attention in the future.
description: Published as part of 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, pp. 23-73 in Acta Zoologica Academiae Scientiarum Hungaricae 54 (1) on pages 40-42, DOI: 10.5281/zenodo.12585274