Key to Crematogaster kelleri group queens

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This queen key is based on: Blaimer, B.B. & Fisher, B.L. 2013. How much variation can one ant species hold? Species delimitation in the Crematogaster kelleri-group in Madagascar. PLoS ONE 8(7): e68082 (doi:10.1371/journal.pone.0068082).

A more detailed treatment of the castes of this group can be found here: Crematogaster kelleri group

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1

  • Propodeal spines short, or reduced to dents or indistinct tubercules (SPI 0.00–0.07); scapes often not reaching head margin (SI 0.65–0.74) . . . . . 2
  • Propodeal spines distinctly spiniform (SPI 0.09–0.10); scapes reaching or surpassing head margin (SI 0.72–0.77) . . . . . Crematogaster tavaratra

2

return to couplet #1

  • Metanotum projecting from below scutellum in dorsal (Fig. 11) and lateral view; postpetiole merely with superficial impression (Fig. 12) . . . . . Crematogaster kelleri
Fig 11. Metanotum projecting from below scutellum in dorsal view C. kelleri
Fig 12. Postpetiole with superficial impression C. kelleri
  • Metanotum not projecting, covered by scutellum (Fig. 13); postpetiole with shallow but distinct longitudinal impression (Fig. 14) . . . . . 3
Fig 13. Metanotum not projecting in dorsal view, covered by scutellum C. hazolava
Fig 14. Postpetiole with median stripe on longitudinal impression C. hazolava

3

return to couplet #2

  • Postpetiole with ‘‘median stripe’’ on longitudinal impression (Fig. 14) . . . . . Crematogaster hazolava