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Holotype major worker. Costa Rica, Heredia: 16km SSW Pto. Viejo, 10.31750°N 84.04889°W, ±500m, 500m, 20 Apr 2007 (Marcos M and Deimer A#AMI-3-W-136-06) [INBC, unique specimen identifier CASENT0609023].
Paratypes: major and minor workers. Same data as holotype; same locality as holotype but 18 Oct 2005 (Marcos M, Gilberth H, and Felix C#AMI-3-W-053-03), 11 Jul 2006 (Gilbert H and Johanna H#AMI-3-W- 085-05), 16 Oct 2006 (Marcos M and Deimer A#AMI-3-W-099-01 and AMI-3-W-099-08), 6 Feb 2007 (Marcos M and Deimer A#AMI-3-W-120-04); Costa Rica, Heredia: 11km SE La Virgen, 10.33333°N 84.06667 °W, ±2000m, 500m, 15 Mar 2003 (ALAS#05/WF/03/39); Costa Rica, Heredia: Cantarrana, 11km ESE La Virgen, 10.34528°N 84.05778°W, ±500m, 300m, 21 Mar 2006 (Marcos M, Gilberth H, Felix C#AMI- 4-W-068-03); Costa Rica, Heredia: La Selva, 8km SW Pto. Viejo, 10.40000°N 84.05000°W, ±2000m, 150m, 17 Jul 1986 (J. Longino#JTL1391-s) [BMNH, CAS, EAPZ, ECOSCE, FMNH, INBC, JTLC, LACM, MCZ, MHNG, MIZA, MZSP, MEL, UCD, ICN, USNM].
Very similar to the sympatric P. karolmoraeHNS; also can be confused with the sympatric P. specularisHNS. See under P. karolmoraeHNS for diagnostic differences from species other than P karolmoraeHNS and P specularisHNS. Minor worker: side of petiole and postpetiole strongly foveolate versus weakly foveolate ( specularisHNS); propodeal spines relatively short, PSLI 14, versus longer, PSLI 15-19 ( specularisHNS); postpetiole in dorsal view oval versus more trapezoidal ( specularisHNS); dorsal face of hind tibia with three or more long erect setae that are longer than maximum width of tibia and differentiated from underlying shorter subdecumbent pubescence versus with short appressed pubescence only, lacking long erect setae ( karolmoraeHNS). Major worker: vertex lobes uniformly foveolate versus with reticulate rugulae overlying foveolate sculpture ( karolmoraeHNS) or less dense and less uniform foveolation ( specularisHNS); head relatively rectangular and weakly impressed posteriorly versus more cordate, with more convex sides and more excavate posterior margin ( karolmoraeHNS); postpetiole in dorsal view relatively trapezoidal versus more transverse, with well-developed conules ( specularisHNS); tibial pilosity difference from karolmoraeHNS as in minor worker.
Description of minor worker
Measurements (paratype): HL 0.44, HW 0.42, HLA 0.13, SL 0.35, EL 0.09, ML 0.45, PSL 0.06, PMG 0.00, SPL 0.03, PTW 0.09, PPW 0.11, CI 94, SI 85, PSLI 14, PMGI 0, SPLI 6, PPI 120. Measurements (n=7): HL 0.39-0.44, HW 0.38-0.43, SL 0.33-0.37, CI 94-99, SI 84-89. Differing from P. karolmoraeHNS only in the diagnostic characters above.
Description of major worker
Measurements (holotype): HL 0.85, HW 0.78, HLA 0.18, SL 0.41, EL 0.11, ML 0.58, PSL 0.08, PMG 0.00, SPL 0.03, PTW 0.13, PPW 0.20, IHT 0.14, OHT 0.28, CI 92, SI 53, PSLI 10, PMGI 0, SPLI 4, PPI 158, HTI 51.
This species is very similar to P. karolmoraeHNS, differing in characters that are not typically considered sufficient to recognize distinct species. However, the two species are sympatric at the smallest spatial scales and show no overlap in the diagnostic characters.
Found most commonly in these habitats: 36 times found in mature wet forest, 10 times found in montane wet forest, 5 times found in tropical rainforest, with some big trees, probably a mix of primary and secondary forest, 2 times found in tropical rainforest, with big trees, probably primary, 2 times found in tropical rainforest, with some big trees, probably a mix of primary and secondary forest, near a small stream.
Found most commonly in these microhabitats: 44 times ex sifted leaf litter, 10 times Hojarasca, 1 times leaf litter.
Collected most commonly using these methods: 41 times miniWinkler, 10 times Mini Winkler, 2 times maxiWinkler, 1 times Winkler, 1 times sifting.
Elevations: collected from 150 - 540 meters, 436 meters average
Type specimens: Holotype Pheidole karolsetosa: casent0609023; Paratype: fmnhins0000050031, fmnhins0000050032; Paratype Pheidole Karolsetosa: casent0609000, casent0609001; Paratype Pheidole karolsetosa: casent0609024, casent0609025, casent0609026, casent0609027, casent0609028, casent0609029, casent0609030, casent0609031, casent0609032, casent0609033, casent0609034, casent0609035, casent0609036, inb0003604328, inb0003604333, inb0003679878, inb0003689345, inb0003689348, inb0003694681, inb0003694685, inb0003696350, inb0003696354, inb0003696450, inb0003696452, inb0003698749, inbiocri002279842