Subfamilies
Links
Jack Longino's Ants of Costa Rica
American Museum Social Insects website
William and Emma Mackay Ants of North America site
sF Myrmicinae Acromyrmex
Acromyrmex are large ants from large colonies which are less common on BCI than they are in La Selva. Jack Longino's Acromyrmex pages from which most of the following derive, notes that octospinosus may represent a species complex. I have not collected volcanus in the BCNM but it is a possible species.
Median pronotal spines usually absent, occasionally present as low tubercles, never distinct spines; head not tapering behind eyes; head width less than or equal to 3.2mm; propodeal spines smoothly or irregularly conical, not carinate; dorsal face of propodeum with pair of indistinct blunt setose tubercles anterior to spines; workers of all sizes red to yellow-brown; head width less than or equal to 2.7mm.
Median pronotal spines usually absent, occasionally present as low tubercles, never distinct spines; head not tapering behind eyes; head width less than or equal to 3.2mm; propodeal spines smoothly or irregularly conical, not carinate; dorsal face of propodeum with pair of indistinct blunt setose tubercles anterior to spines; smaller workers red to yellow-brown, major workers dark brown to black; head width less than or equal to 3.2mm.
Last Updated: 26Dec2004