Grammostola burzaquensis Ibarra-Grasso 1946

Ferretti, N., Pompozzi, G. & Pérez-Miles, F., 2011, The species of Grammostola (Araneae: Theraphosidae) from Central Argentina: taxonomy, distribution, and surface ultrastructure of coxal setae, Zootaxa 2828 (1), pp. 1-18 : 3-5

Grammostola burzaquensis Ibarra-Grasso 1946

( Figs. 20 , 24 , 1 , 15 , 23 ; Tables 1–2)

Grammostola burzaquensis Ibarra-Grasso 1946: 786 , fig. 8; Bücherl 1957: 395, fig. 53; Schiapelli & Gerschman 1961: 203, figs. 3–4 (restored to species); Ibarra-Grasso 1961: 7, unnumbered f.; De Carlo 1973: 344, fig. 1.

G. pulchripes b.: Bücherl 1951: 118 (reduced to subspecies).

Types. Holotype male, Buenos Aires, Argentina, 1946 (Ibarra-Grasso), MLP 105 . Paratype male, Burzaco, Buenos Aires, Argentina, 1944 (Ibarra-Grasso). Female paratype, Buenos Aires, Argentina, 1946 (Ibarra-Grasso) .

Diagnosis. G. burzaquensis is the smaller species of the three in this study and can be recognized by the following combination of characters: cephalic area slightly raised; presence of regular smooth setae on pro- and retrolateral coxal faces of legs I–IV and retrolateral palpal maxillae ( Fig. 20 ); males differ by having a tibial apophysis bearing a long strong black thorn noticeably curved at tip, on inner side of primary (smallest) spur, and very long conical process above the secondary (longer) spur; spermathecae with short straight tubes ( Fig. 24 ); coloration (in vivo) black with lines on patellae, less evident than G. vachoni , and very short reddish setae, shorter than G. doeringi on ventral faces of all legs ( Fig. 1 ).

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.

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) .

Distribution. Most eastern zone of Buenos Aires, Central and southeast of Buenos Aires province ( Fig. 29 ).

Figures

FIGURE 1. Live habitus of adult female G. burzaquensis. Scalebar: 9 mm. Photo: J. Barneche.

FIGURE 29. Distribution of Grammostola burzaquensis.

FIGURES 17–22. Grammostola vachoni, holotype male (MACN 7152) (17, 21), G.doeringi, neotype male (MACN 153) (18), G. schulzei, holotype female (SMF 37537) (19, 22), G. burzaquensis, holotype male (MLP 105) (20). 17. Retrolateral face of coxa I, arrows indicate the groups of spiniform setae. 18. Prolateral face of coxa I. 19. Prolateral face of coxa I. 20. Prolateral face of coxa I. 21. Prolateral face of coxa I. 22. Retrolateral face of maxilla. Scale bars = 3.5mm for 17, 18, 21; 3mm for 20, 22; 3.8mm for 19.

FIGURES 23–28. Grammostola burzaquensis, holotype male (MLP 105) (23), female paratype (24), G. doeringi, allotype female (MACN 151) (25), G. vachoni, holotype male (MACN 7152) (26, 28), female (LZI 15) (27). 23. Tibial apophyses of males. 24. Spermathecae of females. 25. Spermathecae of females. 26. Tibial apophyses of males. 27. Spermathecae of females. 28. Retrolateral face of maxilla. Scale bars = 1.25mm for 23; 3.25mm for 26; 2mm for 28; all others 1mm. Illustrations of 24, 25, 27 by Ferretti,N.

FIGURES 11–16. Grammostola vachoni (11–14, 16), Grammostola burzaquensis (15). 11. Detail of apical zone of long spiniform setae. 12. Short and long spiniform setae. lsp = long spiniform setae, ssp = short spiniform setae. 13. Stridulatory setae on retrolateral face of maxilla. 14. Detail of short barbs with curved tips. 15. Stridulatory setae on retrolateral face of maxilla. 16. Detail of one stridulatory setae.