Bioacoustics of Arctosa meitanensis

Diagnosis. Arctosa meitanensis is similar to Arctosa tridentata Chen & Song, 1999 but differs in the structure of the terminal part and embolus. The apical part of the terminal apophysis (TA in Fig. 27 ) is sharp in A. meitanensis while the apical part to that of A. tridentata is wide and rounded ( Chen & Song 1999: fig. 7 ). The synembolus (Se in Fig. 27 ) is longer than in A. tridentata . The embolus is narrow and long in A. meitanensis (Em in Fig. 27 ) while the embolus of A. tridentata short and wide ( Chen & Song 1999: fig. 7 ). The female of A. meitanensis is similar to Arctosa serrulata Mao & Song, 1985 but differs in the absence apical chink between the septum and body (see Fig. 29 and Song et al ., 1999 : fig. 190b). Discription. Male. Total length 5.40. Carapace: 3.00 long, 1.80 wide. Abdomen 3.00 long. Carapace yellowish, with light marginal bands ( Fig. 21 ). Eye region black. Eye interdistances: AME 0.08, ALE 0.07, PME 0.16, PLE 0.12; AME-AME 0.04, AME-ALE 0.03, PME-PME 0.10, PME-PLE 0.16. Clypeus height 0.1. Chelicerae elongate, yellow, with two promarginal and three retromarginal teeth. Labium brown, longer than wide. Sternum yellowish ( Fig. 22 ). Legs yellowish, with grey stripes. Abdomen grey, with numerous yellowish spots. Palps as in Figs 25-28 . Length of leg segments. femur patella tibia metatarsus tarsus Total I 2.00 1.00 1.80 1.20 0.80 6.80 II 1.70 1.00 1.50 1.20 0.70 6.10 III 1.70 0.80 1.10 1.30 0.70 5.60 IV 2.30 1.10 1.90 2.20 1.10 8.50 Male leg spination. femur patella tibia metatarsus I d1-1, p1-1ap p1-1, v2-2 -1ap v2-2 -2ap II d1-1, p1-1ap p1-1, v2-2 -1ap v2-2 -2ap III d1-3-3 p1, r1 d1-2-3, v2-2 -2ap d2-2, p2ap, r2ap, v2-2 -1ap IV d1-3-3 p1, r1 d1-2-3, v2-2 -2ap d2-2, p2ap, r2ap, v2-2 -1ap Female. Total length 7.10. Carapace: 3.50 long, 2.00 wide. Abdomen 3.60 long. Carapace light brown, with yellowish marginal bands ( Fig. 23 ). Eye region black. Eye interdistances: AME 0.06, ALE 0.09, PME 0.15, PLE 0.12; AME-AME 0.04, AME-ALE 0.04, PME-PME 0.12, PME-PLE 0.23. Clypeus height 0.5. Chelicerae elongate, brown, with two promarginal and three retromarginal teeth. Labium and sternum yellowish ( Fig. 24 ). Legs yellowish with grey rings. Abdomen grey, with numerous yellowish spots. Epigyne as in Figs 29–30. Length of leg segments. femur patella tibia metatarsus tarsus Total I 2.00 1.20 1.80 1.10 0.90 7.00 II 1.90 1.20 1.50 1.20 0.80 6.60 III 1.80 1.00 1.30 1.20 0.80 6.10 IV 2.50 1.40 1.70 2.20 1.00 8.80 Female leg spination. femur patella tibia metatarsus I d1, p1 II d1, p1 III d2-2ap p1, r1 d2-3-1ap, v2-2 d2-2-2ap, v2-2-2ap IV d2-2ap p1, r1 d2-3-1ap, v2-2 d2-2-2ap, v2-2-2ap Habitats. Wormwood-woodreed steppe meadow and motley grass in pine forest near Lake Teletskoye.

Comments. This species described by female from Guizhou Province of China ( Yin et al ., 1993 ). Later Chen & Song (1999) described male from Henan Province, China . Because of the lack of a proper description and drawings, here we provide a redescription of both sexes together with drawings and photos of specimens newly collected from Altai Mountains. This is the western- and northernmost records for this species. Russian specimens of Arctosa meitanensis differ somewhat from those depicted in Yin et al . (1993) and Chen & Song (1999) ; however, unpublished images of the pedipalps of males from South China (Z.S. Zhang pers. comm.) show that the Ta and Se are quite variable and that Russian specimens fall within that variation.