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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1
- Pronotal humeri in dorsal view produced into prominent teeth or bilobed . . . . . 2
- Pronotal humeri distinctly angular or narrowly rounded . . . . . 3
2
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- 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
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- Propodeum armed with a pair of distinct spines . . . . . 4
- Propodeum armed with a pair of more-or-less distinct tuberculae . . . . . Polyrhachis busiris
4
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- 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
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- 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