Bioacoustics of Asemostera dianae

Description. Male ( Holotype , MUSM ENT 00503897): Total length 2.14. Carapace length 1.01, width 0.71. Clypeus height 0.23. Sternum length 0.50, width 0.50. Chelicerae length 0.29. Abdomen length 1.21, width 0.90, height 0.86. Leg formula IV/II/I/III; segment lengths (I/II/III/IV): femora 0.79/0.81/0.65/0.81; patellae 0.21/0.21/0.21/ 0.21; tibiae 0.67/0.65/0.52/0.67; metatarsi 0.58/0.60/0.50/0.65; tarsi 0.42/0.44/0.37/0.44; total 2.67/2.71/2.25/2.74. Palp (femur, patella, tibia, cymbium): 0.42/0.25/0.25/0.33. Coxa IV bases separated by more than the width of one (0.25) vs 0.16, respectively. Metatarsal trichobothria I–III present, IV absent; TmI 0.41. Tibial spine formula: 1-1-1-1. Eye diameters and interdistances: AME 0.06, ALE 0.07, PME and PLE 0.04; AME–ALE 0.04, PME–PLE 0.04, AME–AME 0.02, PME–PME 0.06. Eyes margined with black, especially AME. Clypeus glabrous. Carapace dark brown, narrowed anteriorly, longer than wide, setae present at ocular area. Chelicerae brown. Endites brownish. Labium dark brown. Sternum brown, borders dark brown; strongly truncate posteriorly ( Fig. 4 ). Chelicerae promargin with four teeth, retromargin with three teeth. Stridulatory striae ridged. Legs brown, covered with dark brown dots, except coxa pale brown. Pedicel with sternite and pleurites fused. Abdomen dark grey, longer than wide. Spinnerets dark grey. Palpal paracymbium U-shaped ( Fig. 1 ). Embolus long and embolic membrane well developed anteriorly ( Figs. 1, 2 ). Tegulum with sinuous margin and lightly sinuous duct, forming a long, gently sinuous curve. Tailpiece of radix absent. Retrolateral tibial apophysis hooked, sclerotized distally ( Figs. 1, 3 ), prolateral tibial apophysis projecting distally, pointed. Retrobasal cymbial groove sclerotized. Embolus flagelliform, long, slender and tapered at distal end ( Fig. 2 ). Anterior radical process ( Fig. 2 ), with apex near mid-length of embolus. Female ( Paratype , MUSM ENT 00508000): Total length 2.31. Carapace length 0.92, width 0.73. Clypeus height 0.18. Sternum length 0.48, width 0.48. Chelicerae length 0.29. Abdomen length 1.34, width 0.98, height 0.92. Leg formula IV/II/I/III; segment lengths (I/II/III/IV): femora 0.79/0.79/0.63/0.79; patellae 0.21/0.23/0.21/ 0.23; tibiae 0.65/0.63/0.50/0.65; metatarsi 0.58/0.60/0.50/0.65; tarsi 0.42/0.42/0.37/0.39; total 2.65/2.67/2.21/2.71. Palp (femur, patella, tibia, tarsi): 0.31/0.12/0.23/0.37. Metatarsal trichobothria as in holotype , except TmI 0.39. Tibial spine formula, clypeus texture, coloration of carapace, border of eyes, chelicerae, endites, labium, sternum (except border), abdomen, and spinnerets, truncation of sternum, distance between coxal bases, sclerites of pedicel, and cheliceral stridulatory striae and dentition as in holotype . Eye diameters and interdistances: AME 0.05, ALE 0.06, PME 0.04 and PLE 0.03; AME–ALE 0.04, PME–PLE 0.04, AME–AME 0.02, PME–PME 0.06. Eyes with dark borders. Carapace setae present at ocular area and behind eyes. Legs dark brown. Female palpal tarsus long and swollen ( Fig. 5 ). Epigynum with prominent ventral plate scape. Ventral plate large, wider than longer ( Fig. 6 ). Spermathecae round ( Fig. 7 ). Fertilization duct orientation mesal. Copulatory ducts longer, sinuous, and approaching each other medially ( Fig. 7 ). Dorsal plate large wider than longer ( Fig. 7 ). Variation. Males (n=5): total length 2.1–2.31; carapace length 1.02–1.11. Females (n=5): total length 1.91–2.33; carapace length 0.81–0.88. The color pattern is quite variable from dark-brown to brown in carapace and abdomen dark-grey to grey in both sexes.