| Petiole short and subcylindrical, without an erect scale and without an anterior peduncle | |||
 Propodeum with 2 pairs of spines |
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| Petiole with anterior peduncle | |||
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| Tetramorium caespitum petiole (with anterior peduncle) |
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Number of segments between alitrunk and gaster (2 segments (petiole and postpetiole) are reduced or isolated between the alitrunk and the gaster) Eye size (Eye composed of more than one lens) Spines on alitrunk (Alitrunk with spines) Psammophore (Ventral side of head and mandibles without basket-like series of hairs) Postpetiole attachment (Postpetiole attached to front surface of first gastral segment; petiole with a node and not dorsoventrally flattened) Tubercles (Dorsal surface of body not covered with tubercles) Number of spines on alitrunk (1-2 pairs of spines on alitrunk) Antennal club (Antenna with 3-segmented club) Head size (Contrast between workers' head-body proportions not as extreme)
| Identity - What this specimen is (based on the available information). |
| Diagnostic - How to further narrow the specimen's identity. Select the most appropriate option. |
