Key to females of Neotropical Esagonatopus modified from Olmi & Virla (2014)

1. Metapectal-propodeal complex completely reticulate rugose................................................................ E. antonioi sp. nov. Martins

- Metapectal-propodeal complex granulate or striate, not reticulate rugose ....................................................................................... 2

2. First abdominal tergum of metapectal-propodeal complex totally granulated, not transversely striate ........................................... 3

- First abdominal tergum of metapectal-propodeal complex strongly transversely striate.................................................................. 4

3. Protarsomere 5 with three rows of lamellae and distal apex provided of more than 20 lamellae (Plate 146C in Olmi & Virla 201 4) ........................................................................................................................................................................................ E. olmii Virla

- Protarsomere 5 with two rows of lamellae and distal apex provided of less than 20 lamellae ...... E. minuslamellatus Olmi & Virla

4. Mesosoma black, except distal apex of first abdominal tergum black-testaceous ................................................. E. angelicus Virla

- Mesosoma mostly testaceous or ferruginous, enlarged claw with one small subapical tooth ............................ E. neotropicus Olmi