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Lateral view of body, entire, adult. Lateral view of body, entire, adult.
Acromyrmex octospinosus
Lateral view of body, entire, adult.
Anterior view of head, adult. Anterior view of head, adult.
Acromyrmex octospinosus
Anterior view of head, adult.
Lateral view of gaster, adult worker. Numerous tubercles on first gastral tergite. Lateral view of gaster, adult worker. Numerous tubercles on first gastral tergite.
Acromyrmex octospinosus
Lateral view of gaster, adult worker. Numerous tubercles on first gastral tergite.
Lateral view of thorax, adult worker. Three pairs of spines or teeth on dorsum of promesonotum. Lateral view of thorax, adult worker. Three pairs of spines or teeth on dorsum of promesonotum.
Acromyrmex octospinosus
Lateral view of thorax, adult worker. Three pairs of spines or teeth on dorsum of promesonotum.

Lateral view of thorax / mesosoma, adult worker. Promesonotum is armed with at least three pairs of spines and teeth. Usually the anterior pairs are large and robust, while the posterior pair is smaller. Separates Acromyrmex from Atta . Lateral view of thorax / mesosoma, adult worker. Promesonotum is armed with at least three pairs of spines and teeth. Usually the anterior pairs are large and robust, while the posterior pair is smaller. Separates Acromyrmex from Atta.
Acromyrmex octospinosus
Lateral view of thorax / mesosoma, adult worker. Promesonotum is armed with at least three pairs of spines and teeth. Usually the anterior pairs are large and robust, while the posterior pair is smaller. Separates Acromyrmex from Atta.
Lateral view of gaster, adult worker. Gaster with tubercles on first segment. Separates Acromyrmex from Atta . Lateral view of gaster, adult worker. Gaster with tubercles on first segment. Separates Acromyrmex from Atta.
Acromyrmex octospinosus
Lateral view of gaster, adult worker. Gaster with tubercles on first segment. Separates Acromyrmex from Atta.
Lateral view of body, entire, adult male, drone/solitary. Photo by April Nobile, Antweb.org . Lateral view of body, entire, adult male, drone/solitary. Photo by April Nobile, Antweb.org.
Anergates atratulus
Lateral view of body, entire, adult male, drone/solitary. Photo by April Nobile, Antweb.org.
Anterior dorsal view of head, adult male, drone/solitary. Photo by April Nobile, Antweb.org . Anterior dorsal view of head, adult male, drone/solitary. Photo by April Nobile, Antweb.org.
Anergates atratulus
Anterior dorsal view of head, adult male, drone/solitary. Photo by April Nobile, Antweb.org.

Adult. This individual is from a population that has recently colonized suburban Florida, becoming one of many non-native ant species in the state. Photo by ©Alexander L. Wild, alexanderwild.com Adult. This individual is from a population that has recently colonized suburban Florida, becoming one of many non-native ant species in the state. Photo by ©Alexander L. Wild, alexanderwild.com
Anochetus mayri
Adult. This individual is from a population that has recently colonized suburban Florida, becoming one of many non-native ant species in the state. Photo by ©Alexander L. Wild, alexanderwild.com
Adult. This individual is from a population that has recently colonized suburban Florida, becoming one of many non-native ant species in the state. Photo by ©Alexander L. Wild, alexanderwild.com Adult. This individual is from a population that has recently colonized suburban Florida, becoming one of many non-native ant species in the state. Photo by ©Alexander L. Wild, alexanderwild.com
Anochetus mayri
Adult. This individual is from a population that has recently colonized suburban Florida, becoming one of many non-native ant species in the state. Photo by ©Alexander L. Wild, alexanderwild.com
Lateral view of body, entire, adult worker. Photo by April Nobile, Antweb.org . Lateral view of body, entire, adult worker. Photo by April Nobile, Antweb.org.
Anochetus mayri
Lateral view of body, entire, adult worker. Photo by April Nobile, Antweb.org.
Anterior dorsal view of head, adult worker. Photo by April Nobile, Antweb.org . Anterior dorsal view of head, adult worker. Photo by April Nobile, Antweb.org.
Anochetus mayri
Anterior dorsal view of head, adult worker. Photo by April Nobile, Antweb.org.

Close-up view of head, adult worker. Posterior margin of head not interrupted by median groove. Close-up view of head, adult worker. Posterior margin of head not interrupted by median groove.
Anochetus mayri
Close-up view of head, adult worker. Posterior margin of head not interrupted by median groove.
Multiple views of petiole, adult worker. The petiolar node is excised medially to form a pair of dorsolateral spines. Multiple views of petiole, adult worker. The petiolar node is excised medially to form a pair of dorsolateral spines.
Anochetus mayri
Multiple views of petiole, adult worker. The petiolar node is excised medially to form a pair of dorsolateral spines.
Lateral view of petiole, adult worker. Dorsal surface of petiolar node excised medially to form two lateral teeth. Lateral view of petiole, adult worker. Dorsal surface of petiolar node excised medially to form two lateral teeth.
Anochetus mayri
Lateral view of petiole, adult worker. Dorsal surface of petiolar node excised medially to form two lateral teeth.
Lateral view of body, entire, adult worker. Photo by Erin Prado, Antweb.org . Lateral view of body, entire, adult worker. Photo by Erin Prado, Antweb.org.
Anoplolepis custodiens
Lateral view of body, entire, adult worker. Photo by Erin Prado, Antweb.org.

Anterior view of head, adult worker. Photo by Erin Prado, Antweb.org . Anterior view of head, adult worker. Photo by Erin Prado, Antweb.org.
Anoplolepis custodiens
Anterior view of head, adult worker. Photo by Erin Prado, Antweb.org.
Anterior view of antennal scape, adult worker. The antennal scapes are extremely long, their length measuring more than 1.5x the length of the head. Used in Antkey to separate Anoplolepis gracilipes and Paratrechina longicornis from other formicine genera. Anterior view of antennal scape, adult worker. The antennal scapes are extremely long, their length measuring more than 1.5x the length of the head. Used in Antkey to separate Anoplolepis gracilipes and Paratrechina longicornis from other formicine genera.
Anoplolepis gracilipes
Anterior view of antennal scape, adult worker. The antennal scapes are extremely long, their length measuring more than 1.5x the length of the head. Used in Antkey to separate Anoplolepis gracilipes and Paratrechina longicornis from other formicine genera.
Lateral view of thorax / mesosoma, adult worker. Apparently separated from propodeum by metanotal groove. Lateral view of thorax / mesosoma, adult worker. Apparently separated from propodeum by metanotal groove.
Anoplolepis gracilipes
Lateral view of thorax / mesosoma, adult worker. Apparently separated from propodeum by metanotal groove.
Lateral view of propodeum, adult worker. Propodeal declivity less than twice length of propodeal dorsum. Lateral view of propodeum, adult worker. Propodeal declivity less than twice length of propodeal dorsum.
Anoplolepis gracilipes
Lateral view of propodeum, adult worker. Propodeal declivity less than twice length of propodeal dorsum.

Lateral view of waist, adult worker. Waist with one segment. Lateral view of waist, adult worker. Waist with one segment.
Anoplolepis gracilipes
Lateral view of waist, adult worker. Waist with one segment.
Lateral view of antenna, adult worker. Antennal club indistinct. Lateral view of antenna, adult worker. Antennal club indistinct.
Anoplolepis gracilipes
Lateral view of antenna, adult worker. Antennal club indistinct.
Major and minor workers demonstrating the size extremes among worker ants in a single leafcutter ant colony. Captive colony at the University of Illinois. Photo by ©Alexander L. Wild, alexanderwild.com Major and minor workers demonstrating the size extremes among worker ants in a single leafcutter ant colony. Captive colony at the University of Illinois. Photo by ©Alexander L. Wild, alexanderwild.com
Atta cephalotes
Major and minor workers demonstrating the size extremes among worker ants in a single leafcutter ant colony. Captive colony at the University of Illinois. Photo by ©Alexander L. Wild, alexanderwild.com
Adult soldier. Captive colony at the California Academy of Sciences. Photo by ©Alexander L. Wild, alexanderwild.com Adult soldier. Captive colony at the California Academy of Sciences. Photo by ©Alexander L. Wild, alexanderwild.com
Atta cephalotes
Adult soldier. Captive colony at the California Academy of Sciences. Photo by ©Alexander L. Wild, alexanderwild.com

Atta cephalotes  are often so heavily attended by workers that they are scarcely visible under a mass of little ant bodies. At the top, a soldier stands guard. Laboratory colony at the University of Wisconsin Photo by ©Alexander L. Wild, alexanderwild.com Atta cephalotes are often so heavily attended by workers that they are scarcely visible under a mass of little ant bodies. At the top, a soldier stands guard. Laboratory colony at the University of Wisconsin Photo by ©Alexander L. Wild, alexanderwild.com
Atta cephalotes
Atta cephalotes are often so heavily attended by workers that they are scarcely visible under a mass of little ant bodies. At the top, a soldier stands guard. Laboratory colony at the University of Wisconsin Photo by ©Alexander L. Wild, alexanderwild.com
A busy trail of leafcutter ants at the edge of a tropical pasture. Photo by ©Alexander L. Wild, alexanderwild.com A busy trail of leafcutter ants at the edge of a tropical pasture. Photo by ©Alexander L. Wild, alexanderwild.com
Atta cephalotes
A busy trail of leafcutter ants at the edge of a tropical pasture. Photo by ©Alexander L. Wild, alexanderwild.com
Lateral view of body, entire, adult soldier. Photo by April Nobile, Antweb.org . Lateral view of body, entire, adult soldier. Photo by April Nobile, Antweb.org.
Atta cephalotes
Lateral view of body, entire, adult soldier. Photo by April Nobile, Antweb.org.
Anterior view of head, adult soldier. Photo by April Nobile, Antweb.org . Anterior view of head, adult soldier. Photo by April Nobile, Antweb.org.
Atta cephalotes
Anterior view of head, adult soldier. Photo by April Nobile, Antweb.org.

Lateral view of body, entire, adult worker. Photo by April Nobile, Antweb.org . Lateral view of body, entire, adult worker. Photo by April Nobile, Antweb.org.
Atta cephalotes
Lateral view of body, entire, adult worker. Photo by April Nobile, Antweb.org.
Anterior view of head, adult worker. Photo by April Nobile, Antweb.org . Anterior view of head, adult worker. Photo by April Nobile, Antweb.org.
Atta cephalotes
Anterior view of head, adult worker. Photo by April Nobile, Antweb.org.
Lateral view of thorax / mesosoma, adult worker. Two pairs of spines or teeth on dorsum of promesonotum. Lateral view of thorax / mesosoma, adult worker. Two pairs of spines or teeth on dorsum of promesonotum.
Atta cephalotes
Lateral view of thorax / mesosoma, adult worker. Two pairs of spines or teeth on dorsum of promesonotum.
Lateral view of pronotum, adult worker. 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. Lateral view of pronotum, adult worker. 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.
Atta cephalotes
Lateral view of pronotum, adult worker. 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.