Bioacoustics of Grammostola burzaquensis

Description. Male ( Holotype ) MLP 105: Total length, excluding chelicerae and spinnerets, 31.5. Carapace length 14.8, width 13. Cephalic area slightly raised. Anterior eye row procurved, posterior recurved. Eye sizes and interspaces: AME 0.17, ALE 0.14, PME 0.19, PLE 0.1, AME–AME 0.39, AME–ALE 0.19, PME–PME 0.75, PME–PLE 0.04, ALE–PLE 0.13, OQ length 1.38, width 1.5. Clypeus 0.7. Fovea straight, width 1.5. Labium 1.5 long, 2.7 wide with 91 evident cuspules, although cuticular holes indicate 136 originally, maxillae with 190 cuspules on inner third. Sternum 6.0 long, 5.5 wide. Chelicerae with 8 teeth on promargin and 2 small teeth on retromargin. Regular smooth setae on pro- and retrolateral coxal faces of legs I–IV and retrolateral palpal maxillae. Stridulatory setae on retrolateral face of maxilla and opposing prolateral face of coxa I are typical and well developed ( Fig. 15 ). Tarsi I–IV densely scopulated, scopula entire. Metatarsi I entirely scopulated, II 3/4 scopulated, III 1/2 scopulated and IV 1/4 scopulated. Spination: femorae and patellae I–IV and palps, 0. Tibiae: palp 1-2-1 P; I 1- 1-1 P, 1 V, 1-1 R; II 1-1-1 P, 1-1 V, 1-1 R; III 1-1-1 P, 1-1-2 V, 1-1-1 R; IV 1-1-1 P, 2-1-2 V, 1-1R. Metatarsi: I 1 P, 1 R, 1 V; II 1-1-1 V, 1 P; III 1-1-2 V, 1-1-1-1 P, 1-1-1 R; IV 1-1-1 V, 1-1-2 P, 1-1 R. Tarsi I–IV and palp 0. Tibia I with paired ventral apophyses, bearing long strong black thorn, noticeably curved at tip, on inner side of primary (smallest) spur, and very long conical process on top of secondary (longer) spur ( Fig. 23 ). Palpal organ piriform. Color (in alcohol): cephalothorax and legs light brown with yellowish hairs, prominent lines on patellae and femorae, abdomen dark brown. Female ( Paratype ): Total length, excluding chelicerae and spinnerets, 39.1. Carapace 14.7 long, 13.8 wide. Cephalic area slightly raised. Anterior eye row procurved, posterior recurved. Eye sizes and interspaces: AME 0.32, ALE 0.12, PME 0.25, PLE 0.1, AME–AME 0.36, AME–ALE 0.33, PME–PME 1.04, PME–PLE 0.04, ALE– PLE 0.13, OQ length 1.57, width 2. Clypeus 1.7. Fovea straight, width 3. Labium 2.0 long, 2.7 wide with 155 evident cuspules, although cuticular holes indicate 158 originally, maxillae with 222 cuspules on inner third. Sternum 7.2 long, 7.0 wide. Chelicerae with 9 big and 2 small teeth on promargin and 3 small teeth on retromargin. Regular smooth setae on pro- and retrolateral coxal faces of legs I–IV and retrolateral palpal maxillae. Stridulatory setae on retrolateral face of maxilla and opposing prolateral face of coxa I are typical and well developed. Tarsi I–IV densely scopulated, I–II entire, III–IV divided by row of three setae. Metatarsi I 2/3 scopulated, II 2/3 scopulated, III 3/4 scopulated and IV 1/4 scopulated. Spination: Femorae and patellae I–IV and palps, 0. Tibiae: palp 1-2 P 1 R; I 1 P, 1-1 V; II 1-1-1 P, 1-1 V; III 1 P, 1 V; IV 1 P, 1 V, 1-1R. Metatarsi: I 1 V; II 1-1 V, 1 P, 1 R; III 1-1 V, 1-1 P, 1 R; IV 1-1 V, 2 P, 2-1-1 R. Tarsi I–IV and palps 0. Color (in alcohol): cephalothorax and legs light brown with yellowish hairs, abdomen dark brown. Spermathecae with short straight tubes. I II III IV Palp Fe 13.20 11.80 10.40 12.10 8.60 Pa 5.90 4.90 5.50 4.10 4.50 Ti 9.60 8.60 5.90 10.30 5.50 Mt 7.40 8.10 8.40 7.70 - Ta 4.80 5.70 6.20 4.70 2.70 Total 40.90 39.10 36.40 38.90 21.30 I II III IV Palp Fe 11.50 10.20 8.50 9.90 8.50 Pa 6.30 6.20 5.20 4.40 3.60 Ti 7.45 7.80 7.10 8.30 5.90 Mt 6.30 4.90 8.40 9.30 - Ta 4.80 4.50 6.20 5.30 5.50 Total 35.90 33.60 35.40 37.20 23.50 Other examined material. Argentina : Buenos Aires Province : La Plata , Feb.1952 , Ringuelet col., 1 female ( MACN 362 ) ; same locality, 13-19 May 1918 , no collector, 3 males ( MACN 86,87,88) ; same locality, Nov 1939 , Barrow col., 1 male ( MACN LP45 ) ; same locality, no date, Juanco col., 1 female ( MACN 317 ) ; same locality, 26 Nov 1950 , Pérez col., 1 male ( MACN LP61 ) ; same locality, no date, M. Biraben col., 1 female ( MACN LP37 ), 1 male ( MACN LP36 ) ; La Plata , Campo de los Ingleses , Mar 1940 , no collector, 1 immature ( MACN 76 ) ; Azul , 18 Nov 1961 , E. Aguirre col., 1 male ( MACN ) ; Buenos Aires , 1956, Riglos col., 1 male ( MACN ) ; Burzaco , Nov 1948 , Martinez col., 1 male ( MACN ) ; Florencio Varela , 22 Nov 1949 , De Ferraris col., 3 females ( MACN LP33 , LP34 , LP35 ) ; Balcarce , Laguna Brava , Dec 1960 , no collector, 2 males ( MACN ) ; Luis Guillón , 29 Nov 1964 , Martinez col., 1 immature ( MACN ) ; Magdalena , Jan 1942 , Monrós col., 1 female ( MACN 1299 ) ; Moreno , 21 Mar 1964 , E. Maury col., 1 male ( MACN ) ; same locality, 20 Oct 1964 , E. Maury col., 1 female ( MACN ) .