Key to Papuasian Polyrhachis Cyrtomyrma species

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


 * Propodeal spines very short, strongly upturned and acute . . . . . Polyrhachis albertisi

3
return to couplet #1
 * Propodeum armed with a pair of distinct spines . . . . . 4


 * Propodeum armed with a pair of more-or-less distinct tuberculae . . . . . Polyrhachis busiris

4
return to couplet #3
 * Propodeal spines long, dorsoventrally compressed, widely diverging and bluntly terminated; lateral petiolar spines distinctly elongated . . . . . Polyrhachis barryi


 * 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


 * Smaller species (HL < 1.56); pronotal dorsum in profile only weakly convex towards distinctly impressed promesonotal suture; pronotal humeri distinctly angular . . . . . Polyrhachis mondoi