Xenonemesia platensis Goloboff 1988

Indicatti, Rafael Prezzi, Lucas, Sylvia Marlene & Brescovit, Antonio Domingos, 2007, A new species of the spider genus Xenonemesia Goloboff and first record of X. platensis Goloboff from Brazil (Araneae, Mygalomorphae, Microstigmatidae), Zootaxa 1485, pp. 43-49 : 44

Xenonemesia platensis Goloboff 1988

( Figs. 1–4 , 9–17 )

Xenonemesia platensis Goloboff 1988: 69 , figs. 1–12 (Female holotype and male paratype from General Pacheco, Buenos Aires, Argentina, deposited in Museo Argentino de Ciencias Naturales "Bernardino Rivadavia", Buenos Aires, 8603 and 8608 examined); Goloboff 1993: 6, 22; Goloboff 1995: 5; Platnick 2006.

Diagnosis. Males of Xenonemesia platensis differ from those of X. otti n. sp. by the shorter embolus and straight apical region of the embolus ( Figs. 1–3 ), and females differ in the short, straight seminal receptacle in the genitalia ( Fig. 4 ).

Description. See Goloboff (1988: 358–362, figs. 1–14).

New record. BRAZIL. Rio Grande do Sul: Caçapava do Sul, Santa Barbinha, 2 males (MCTP 17166; IBSP 12857).

Distribution. Argentina, Uruguay and southern Brazil.

Figures

FIGURES 1 – 8. 1 – 4. Xenonemesia platensis. 1 – 3. Left palpal bulb. 1. Prolateral view; 2. Ventral view; 3. Retrolateral view; 4. Female spermathecae, dorsal view (female from Parque Nacional El Palmar, Entre Ríos, Argentina); 5 – 8. X. otti n. sp. 5 – 7. Left palpal bulb. 5. Prolateral view; 6. Ventral view; 7. Retrolateral view; 8. Female spermathecae, dorsal view. Scale bars = 0.5 mm.

FIGURES 9 – 17. Xenonemesia platensis. 9 – 12. Male. 9. Carapace, dorsal view; 10 – 11. Abdomen. 10. Dorsal view; 11. Ventral view; 12. Sternum, ventral view. 13 – 17. Female. 13. Body, dorsal view; 14. Carapace, dorsal view; 15. Sternum, ventral view; 16 – 17. Abdomen. 16. Ventral view; 17. Lateral view (female from Parque Nacional El Palmar, Entre Ríos, Argentina). Scale bars = 1 mm.