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Yellow crazy ant

Scientific Name
Anoplolepis gracilipes
Scientific Author
(Hymenoptera: Formicidae: Formicinae)
Exotic Species Establishment in Australia

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Diagnostic Images

Dorsal View - Queen
Cairns, N Qld, Spence St, Ting Sing Bond Store, 23 April 2001, R. Gollan ex nest in Bond Store, Det. J. F. Grimshaw 2001 (NAQS/AQIS Mareeba)
Amy Carmichael Queensland University of Technology
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Diagnostic Images (9)
Other Images (5)
Diagnostic Notes

Total length of workers around 4 mm. Body color yellow, gaster brownish. Antennae and legs remarkably long. Head oval. Clypeus produced medially, with convex anterior margin. Eyes relatively large and produced. Mandibles with 8 teeth. Antennae 11-segmented; scapes twice as long as the length of the head, or longer; their second to terminal segments each more than three times as long as wide. Mesosoma slender. Pronotum narrow, with almost straight dorsum in profile. Anterior portion of mesonotal dorsum, back to the propodeum, gently concave in profile. Propodeal dorsum convex in profile. Petiole thick, with an inverted-U-shaped crest. Erect hairs present on head and gaster, lacking on dorsum of mesosoma.

A. gracilipes, or the yellow crazy ant, is one of the largest invasive ants. This species, also known as the long-legged ant, is notable for its remarkably long legs and antennae.  It has a yellow-brownish body colour, and is weakly sclerotized. Workers have a long slender gracile body, with the gaster is usually darker than the head and thorax. It may subdue or kill invertebrate prey or small vertebrates by spraying formic acid.

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More Information
Specimen Contact
AQIS Brisbane
Walker, K.
28/05/2005 03:22 AEST
Last Updated
17/12/2008 16:15 AEST
Walker, K. (2005) Yellow crazy ant (Anoplolepis gracilipes) Updated on 12/17/2008 4:15:01 PM Available online: PaDIL -
Image Use
Free for use under the Creative Commons Attribution 3.0 Australia License