Tetragnatha filigastra Mello-Leitão, 1943 nomen dubium

(Figs 16C, D)

Tetragnatha filigastra Mello-Leitão, 1943: 192, fig. 23 (Holotype male immature, wrongly indicated as female adult, from Rio Grande do Sul, Brazil, Pe. B. Rambo coll., deposited in MNRJ 42522, poorly preserved, genital area dissected and abdomen loose, examined).

Notes. Mello-Leitão (1943) described this species as an adult female, despite the large but undeveloped palps and small chelicerae of the immature male holotype (Fig. 16C; Mello Leitão 1943, fig. 23). The elongated and slen- der abdomen with lateral black patches is not enough to correctly ascribe this species to T. tenuissima or other slen- der species described in this paper, thus we decided to undermine the validity of this species as a nomen dubium.