2 subspecies
Taxonomic history
| Combination in Pheidole (Pheidolacanthinus): Mann, 1919 PDF: 307. |
| Senior synonym of Pheidole adamsoni: Wilson & Taylor, 1967b PDF: 52. |
| Current subspecies: nominal plus Pheidole sexspinosa biroi, Pheidole sexspinosa fuscescens. |
Found most commonly in these habitats: 30am on a sunny, sunny day (already!) times found in Didn't see Anoplolepis; PB baiting along trail; Iridomyrmex collected in Savannah area ~8, 1 times found in upland forest litter, SE edge of swamp forest, 3 times found in from stick in leaf litter, 1 times found in PB and maple syrup baiting around property, esp at edge of forest in back; early morning, after heavy rain; Also some good incidental collections under coconut husks and on tre, 1 times found in Under stone near restaurant, 1 times found in PB/ Maple syrup baiting, +incidental collections; baited outer wall and inner stones small stonework, immediately surrounding church, 1 times found in Pheidole sexspinosa from dead log in trail; secondary forest on one side, uluhe on other, fairly open canopy, 1 times found in Winkle 1m2 - #3 uphill more; canopy a little shorter, no tree ferns in immediate vicinity; 1-2cm leaf litter, 1 times found in Davis-sifting, PB baits, incidental collections, ~ 2hrs, 1 times found in Forest off road, some great big Phicus trees, a few birds nest ferns; Davis-sifting, incidental collections, and PB bait.; lots of Anoplolepis; found Pyramica twice, once in Davis-sifted leaves/rottin, ...
Collected most commonly using these methods or in the following microhabitats: 19 times davis-sifting; incidental aspirated, 6 times aspirated, 7 times Hand-Collected from 1 square meter of sifted leaf litter, 7 times aspirating; PB & maple syrup bait, 2 times aspirating; PB bait, 6 times aspirating, 4 times davis-sifting; incidental aspirated; PB bait, 6 times 1 sq meter leaf litter winkler extraction, 1 times davis-sifting
Elevations: collected from 1 - 488 meters, 191 meters average
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