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Atlantic slopes of Nicaragua and Costa Rica.
This is an obligate inhabitant of several species of myrmecophytic Piper, forming a specialized ant-plant mutualism. It was previously identified as P. bicornis. See additional notes under P. bicornis.
Found most commonly in these habitats: 10 times found in montane wet forest, 1 times found in lowland rainforest, 1 times found in cloud forest, 6 times found in mature wet forest, 3 times found in wet forest, 1 times found in 25yr old second growth and primary forest, 1 times found in La Selva, 1 times found in CC 1200 m., 1 times found in Sura.
Found most commonly in these microhabitats: 1 times Nest in Piper coenocladum, 2 times ex ant Piper, 7 times Sobre Vegetacion, 1 times ex Piper antplant, 5 times ex sifted leaf litter, 1 times in ant Piper, 1 times nest in Piper, 1 times nest in ant Piper, 1 times N-S leg of LEP. Pheidole bicornis; from ant Piper, 1 times bajo de M/14, 1 times nest in Piper antplant, ...
Collected most commonly using these methods: 6 times search, 7 times Sweeping, 5 times miniWinkler, 2 times flight intercept trap, 1 times Fogging, 1 times Malaise.
Elevations: collected from 50 - 1060 meters, 441 meters average
Collect Date Range: collected between 1985-03-12 and 2013-12-29
Type specimens: Holotype of Pheidole passivaeferox Longino 2019: inbiocri002279624; Paratype of Pheidole passivaeferox Longino 2019: casent0625443, casent0646675, casent0646676, casent0646677, casent0646678, casent0646679, casent0646680, casent0646681, casent0646682, casent0646683, casent0646684, inbiocri002279623
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