Key to Proceratium of Fiji

This worker key is based on: *[[Media:Hita Garcia, F., Sarnat, E.M. & Economo, E.P. 2015 Revision of the ant genus Proceratium Roger in Fiji.pdf|Hita Garcia, F., Sarnat, E.M. & Economo, E.P. 2015. Revision of the ant genus Proceratium Roger (Hymenoptera, Proceratiinae) in Fiji. ZooKeys. 475:97–112.]]

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Proceratium

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 * Significantly smaller species (HW 0.52; WL 0.66); lateral expansions of frontal carinae conspicuously triangular and acute (Fig. 1A); petiolar node moderately squamiform (DPeI 263), and only weakly narrowing from base to apex; subpetiolar process rounded, not dentiform nor spiniform (Fig. 1D) . . . . . Proceratium vinaka


 * Significantly larger species (HW 0.76–1.03; WL 0.99–1.38); lateral expansions of frontal carinae weakly triangular and moderately rounded (Fig. 1B, C); petiolar node extremely squamiform (DPeI 620–693) and strongly narrowing from base to apex; subpetiolar process conspicuously dentiform or spiniform (Fig. 1E, F) . . . . . 2

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 * Smaller species (HW < 0.80; WL < 1.10); in full-face view head thinner (CI 93); in profile propodeum rounded from dorsum to declivity (Fig. 2A); subpetiolar process thinly dentiform (Fig. 1E) . . . . . Proceratium oceanicum
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 * Larger species (HW > 1.00; WL > 1.30); in full-face view approximately as long as wide (CI 101); in profile propodeum with weak angles from dorsum to declivity (Fig. 2B); subpetiolar process thickly spiniform (Fig. 1F) . . . . . Proceratium relictum