Five new species of the long-jawed orb-weaving spider genus Tetragnatha (Araneae, Tetragnathidae) in South America, with a key to the species from Argentina and Brazil

Tetragnatha oncognatha sp. nov. SEM photos. A, B. Male left chelicera; A. Upper view (MCTP 15965); B. Lower view (MCTP 15792); C, D. Female left chelicera (MCTP 43654); C. Upper view; D. Lower view; E–G. Left male pedipalp; E. Mesal view (MCTP 4929); F. Tip of conductor and embolus opening detail, ventral view (MCTP 15792); G. Paracymbium detail, ventral view (MCTP 15792); H. Epiandrous field detail, ventral view (MCTP 15965). Scale bars: 0.2 mm (A–D); 0.1 mm (E); 0.05 mm (F, G); 0.02 mm (H).