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Species: Pheidole sagittaria   Wilson, 2003 

Classification:
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Taxonomic History (provided by Barry Bolton, 2019)

Pheidole sagittaria Wilson, 2003A: 502, figs. (s.w.) COSTA RICA. Neotropic. AntCat AntWiki HOL

Distribution:

  Geographic regions (According to curated Geolocale/Taxon lists):
    Americas: Costa Rica, Panama
  Biogeographic regions (According to curated Bioregion/Taxon lists):
    Neotropical

Distribution Notes:

Costa Rica: Montane regions from 500 to 1600m (Monteverde area, Braulio Carrillo, Cerro Pittier).

Biology:

Natural History:

This species is common in Winkler samples from mature wet forest. Two nests have been observed, one in rotten wood on the ground, the other under loose bark of a dead tree trunk on the ground.

Taxonomic Treatment (provided by Plazi)

Treatment Citation: Wilson, E. O., 2003, Pheidole in the New World. A dominant, hyperdiverse ant genus., Cambridge, MA: Harvard University Press

Pheidole sagittariaHNS new species

types Mus. Comp. Zool. Harvard.

Etymology L sagittariaHNS, pertaining to arrows, referring to the head shape of the major.

diagnosis Similar to the species listed in the heading above, differing as follows.

Major: light brown; head strongly flattened dorsoventrally, so that in side view it is narrowly rectangular; in addition, the head and mandibles together in full-face view are heart-shaped or (adding flattening top to bottom) shaped like an arrowhead; propodeal spines reduced to denticles; apex of petiolar node pointed; carinulae cover most of anterior fourth of dorsal head surface, and almost all of the rest of the body smooth and shiny.

Minor: eye very large, oval, set far forward on head; propodeal spines reduced to denticles; almost all of head and body smooth and shiny.

measurements (mm) Holotype major: HW 0.72, HL 0.76, SL 0.38, EL 0.10, PW 0.34. Paratype minor: HW 0.34, HL 0.36, SL 0.32, EL 0.06, PW 0.22. Color Major: body light brown, appendages yellowish brown. Minor: body yellowish brown, appendages dark yellow.

Range Mostly montane regions of Costa Rica from 500 to 1600 m (Longino 1997).

Biology According to Longino (1997), sagittariaHNS is common in mature wet forests. The two nests he found were, respectively, in a piece of rotten wood on the ground and under the loose bark of a dead tree trunk.

Figure Upper: holotype, major. Lower: paratype, minor. COSTA RICA: Rio Toro Amarillo, near Guapiles, Limon (W. L. Brown). Scale bars = 1 mm.

Specimen Habitat Summary

Found most commonly in these habitats: 28 times found in mature wet forest, 17 times found in wet forest, 21 times found in montane wet forest, 9 times found in cloud forest, 1 times found in wet forest edge, 1 times found in rainforest, 2 times found in Primary wet forest, 2 times found in 2nd growth veg., 2 times found in montane moist forest, 1 times found in tropical rainforest, with big trees, probably primary, ...

Found most commonly in these microhabitats: 47 times ex sifted leaf litter, 16 times Hojarasca, 1 times under dead bark, 2 times sifted litter (leaf mold, rotten wood), 1 times nest in rotten wood, 2 times nest in treefern base, 3 times at bait, 1 times nest in dead stick, 1 times nest in dead stem, 2 times Cerca del Refugio Cascante, 2 times at baits, ...

Collected most commonly using these methods: 28 times miniWinkler, 16 times Winkler, 16 times Mini Winkler, 6 times Search, 7 times maxiWinkler, 3 times bait, 3 times Berlese, 1 times 6L sifted litter, extracted in Winkler sack over 36 hours, 2 times baiting, 1 times 6L sifted litter, extracted in Winkler sack over ~18 hours, 1 times Sweeping, ...

Elevations: collected from 50 - 1670 meters, 786 meters average

Type specimens: paratype Pheidole sagittaria: jtlc000016520



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