Key to Papuasian Polyrhachis Cyrtomyrma species

AntWiki: The Ants --- Online

This worker key is based on: Kohout, R.J. 2009b. A new species and nomenclatural changes in the subgenus Polyrhachis (Cyrtomyrma) Forel. Australian Entomologist. 36:37-48.

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Polyrhachis

1

  • Pronotal humeri in dorsal view produced into prominent teeth or bilobed . . . . . 2
  • Pronotal humeri distinctly angular or narrowly rounded . . . . . 3

2

return to couplet #1

  • Propodeal spines long, dorsoventrally compressed, widely diverging and bluntly terminated (Aru Is) . . . . . Polyrhachis levior
Polyrhachis levior casent0901809 p 1 high.jpg
Polyrhachis levior casent0901809 d 1 high.jpg
Polyrhachis albertisi casent0905545 h 1 high.jpg
Polyrhachis albertisi casent0905545 p 1 high.jpg

3

return to couplet #1

  • Propodeum armed with a pair of distinct spines . . . . . 4
Polyrhachis busiris head 25 AntWiki.jpg
Polyrhachis busiris side 20 AntWiki.jpg

4

return to couplet #3

  • Propodeal spines long, dorsoventrally compressed, widely diverging and bluntly terminated; lateral petiolar spines distinctly elongated . . . . . Polyrhachis barryi
Polyrhachis barryi 50N head CZ AntWiki.jpg
Polyrhachis barryi 40N side CZ AntWiki.jpg
  • Propodeal spines short, acute, strongly upturned; petiolar spines more-or-less subequal . . . . . 5

5

return to couplet #4

  • Larger species (HL > 1.68); anterior face of pronotal dorsum in profile strongly convex; pronotal humeri narrowly rounded . . . . . Polyrhachis linae
Polyrhachis linae casent0903424 h 1 high.jpg
Polyrhachis linae casent0903424 p 1 high.jpg
  • Smaller species (HL < 1.56); pronotal dorsum in profile only weakly convex towards distinctly impressed promesonotal suture; pronotal humeri distinctly angular . . . . . Polyrhachis mondoi
Polyrhachis mondoi casent0903428 h 1 high.jpg
Polyrhachis mondoi casent0903428 p 1 high.jpg