Key to Bannapone species

Keys to species of Bannapone based on Eguchi et al. (2015). Note that Bannapone is currently considered to be a junior synonym of Stigmatomma.

Worker Key

Stigmatomma mulanae is excluded from this key because the worker remains unknown.

1

• Antenna 10-segmented => Stigmatomma fulvidum
• Antenna 11-segmented => 2

2

• Mid-basal tooth row of mandible consisting of 2 blunt teeth; frontal lobes relatively distinctly separated by posteromedian portion of clypeus => Stigmatomma scrobiceps
• Mid-basal tooth row of mandible consisting of 4–5 blunt or truncate teeth; frontal lobes closely approximated => 3

3

• Mid-basal tooth row consisting of 5 teeth of which basal four almost equal in size; preapical denticle of apical blade of mandible developed well => Stigmatomma pertinax
• Mid-basal tooth row consisting of 4–5 teeth which decrease in size toward base; preapical denticle of apical blade of mandible absent or reduced => 4

4

• Frontal carinae conspicuous, reaching vertex; 9th and 10th antennal segments each a little longer than broad; posterolateral part of propodeum strongly produced posteriad => Stigmatomma crypticum
• Frontal carinae inconspicuous, extending by no more than the length of frontal lobe; 9th and 10th antennal segments each (a little) shorter than broad; posterolateral part of propodeum feebly produced posteriad => 5

5

• Head distinctly longer than broad => Stigmatomma caliginosum
• Head as long as broad => Stigmatomma zwaluwenburgi

Queen Key

Stigmatomma fulvidum, Stigmatomma pertinax, Stigmatomma scrobiceps and Stigmatomma zwaluwenburgi are excluded from this key because the queens remain unknown.

1

• Mid-basal tooth row consisting of 4–5 blunt teeth; distance between median ocellus and lateral ocellus as long as or shorter than that between lateral ocelli => 2
• Mid-basal tooth row consisting of 2 blunt teeth; distance between median ocellus and lateral ocellus longer than that between lateral ocelli => Stigmatomma mulanae

2

• Anteromedian portion of clypeus lacking a pair of extremely long and flexible setae; frontal carinae inconspicuous, extending by no more than the length of frontal lobe => Stigmatomma caliginosum
• Anteromedian portion of clypeus bearing a pair of extremely long and flexible setae; frontal carinae conspicuous, reaching vertex => Stigmatomma crypticum

References

• Eguchi, K., Bui, T.V., Yamane, S., and Terayama, M. 2015. Redefinition of the genus Bannapone and description of B. cryptica sp. nov. (Hymenoptera: Formicidae: Amblyoponinae). Zootaxa. 4013:77–86 (doi:10.11646/zootaxa.4013.1.5).