KEY TO SPECIES OF TINADYSDERINA

1. Males...................................................................................................................................................2

– Females...............................................................................................................................................7

2. Embolus bifid for most of its length (figs. 260, 272)...................................................................3

– Only distal half of embolus bifid....................................................................................................4

3. Embolus relatively short, wide (fig. 260)............................................................................ bremen

– Embolus relatively long, narrow (fig. 272).......................................................................... pereira

4. Prolateral branch of embolus much shorter than retrolateral branch (fig. 248)......... gorgona

– Prolateral and retrolateral branches of embolus subequal in length.........................................5

5. Tip of retrolateral branch of embolus narrow, not much wider than tip of prolateral branch (fig. 236)................................................................................................................................ planada

– Tip of retrolateral branch of embolus wider (figs. 212, 224).....................................................6

6. Embolar branches approximate at their base (fig. 212).............................................. tinalandia

– Embolar branches well separated at their base (fig. 224).................................................. otonga

7. Anterior genitalic process T-shaped (fig. 278)................................................................... pereira

– Anterior genitalic process otherwise.............................................................................................8

8. Apodemes very short (fig. 242).......................................................................................... planada

– Apodemes longer..............................................................................................................................9

9. Postepigastric scutum extending only to about two-thirds of abdomen length (fig. 263)...... ................................................................................................................................................. bremen

– Postepigastric scutum extending to near spinnerets.................................................................10

10.Anterior genitalic process short, confined to atrial area (fig. 254)................................ gorgona

– Anterior genitalic process extending anterior of genital atrium..............................................11

11.Genital atrium with posterolateral bulges (figs. 229, 230)................................................ otonga

– Genital atrium without such bulges (figs. 217, 218).................................................... tinalandia