pronotal spines strongly arch anteriorly

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The pronotal spines are strongly arching anteriorly. This character may be informative for separating Atta cephalotes from Atta sexdens, but attine pronotal spines show considerable infraspecific variation and this character may well prove unreliable, and thus must be used with caution.

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Scratchpads developed and conceived by (alphabetical): Ed Baker, Katherine Bouton Alice Heaton Dimitris Koureas, Laurence Livermore, Dave Roberts, Simon Rycroft, Ben Scott, Vince Smith