Key to species of Ooceraea

This key to workers of Ooceraea is based on Zhou, Chen & Chen (2020).

1

 * Antenna 8-segmented (China: Guangxi) Ooceraea octoantenna
 * Antenna 9- or 11-segmented

2

 * Antenna 11-segmented
 * Antenna 9-segmented

3

 * Propodeum armed with two pairs of denticles (Vietnam)  Ooceraea quadridentata
 * Propodeum armed without denticles

4

 * Anterior of  pronotum  with  distinct  ridge;  pronotum  in lateral  view  slightly  convex  dorsally;  postpetiole  in  dorsal view slightly broader than long (Sri Lanka)  Ooceraea coeca
 * Anterior of  pronotum  without  ridge;  pronotum  in  lateral view  distinctly  convex  dorsally;  postpetiole  in  dorsal  view slightly longer than broad (Sri Lanka)  Ooceraea fragosa

5

 * Compound eye present, comprising more than 10 ommatidia (India) Ooceraea besucheti
 * Compound eye absent or extremely vestigial

6

 * Postpetiole in dorsal view slightly longer than broad
 * Postpetiole in dorsal view slightly broader than long

7

 * Head coarsely  and  irregularly  rugose  and  punctuate (Solomon Islands)  Ooceraea pawa
 * Head only bearing regular punctures (New Guinea) Ooceraea pusilla

8

 * Dorsum of mesosoma smooth and shiny (australis) Ooceraea australis
 * Dorsum of mesosoma with abundant punctures

9

 * Diameter of punctures on dorsum of head as equal to or larger than the average distance separating them
 * Diameter of punctures on dorsum of head distinctly smaller than the average distance separating them

10

 * Posterior margin of head distinctly concave in the middle (India) Ooceraea alii
 * Posterior margin of head almost straight, at most shallowly concave

11

 * Antennal scrobe surface smooth and shiny (Fiji) Ooceraea fuscior
 * Antennal scrobe surface with annular fine striation (New Guinea) Ooceraea papuana

12

 * For full-face view  the  head  is  broader  posteriorly  (The tropical regions)  Ooceraea biroi
 * For full-face view the head is as broad in front as behind (Fiji) Ooceraea crypta