At Cuzco Amazónico Stefan Cover (personal communication) found cardiella in both terra firme and seasonally flooded rainforest, nesting in soil, litter, and small pieces of rotten wood. Colonies appeared to be small, and in some cases occupied more than one nest site. (Wilson 2003)
See the description in the nomenclature section.
Keys including this Species
Recorded from the type locality and from Manabí and Pichincha Provinces of Ecuador. (Wilson 2003)
Distribution based on Regional Taxon Lists
Distribution based on AntMaps
Distribution based on AntWeb specimens
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The following information is derived from Barry Bolton's New General Catalogue, a catalogue of the world's ants.
- cardiella. Pheidole cardiella Wilson, 2003: 390, figs. (s.w.) PERU.
Unless otherwise noted the text for the remainder of this section is reported from the publication that includes the original description.
A member of the flavens group, most similar to Pheidole goeldii, Pheidole mittermeieri, Pheidole nuculiceps, Pheidole sculptior and Pheidole striaticeps. Distinguished by the following combination of traits.
Major: head with mandibles in full-face view almost perfectly heart-shaped; antennal scrobes present; vertex near occiput conspicuously depressed; entire dorsal surface of head, except for frontal triangle, mid-clypeus, and antennal scrobes, longitudinally carinulate; carinulae originating on frontal lobes curve weakly inward as they approach occiput, and carinulae laterad to the antennal scrobes curve strongly inward to meet those originating on the frontal lobes; all of mesosoma foveolate and opaque; postpetiole diamond-shaped.
Minor: all of head and mesosoma foveolate and opaque; eye set forward on head, separated from genal border by a distance about equal to Eye Length; carinulae on head fail to reach eye level.
MEASUREMENTS (mm) Holotype major: HW 0.72, HL 0.72, SL 0.36, EL 0.08, PW 0.34. Paratype minor: HW 0.38, HL 0.42, SL 032, EL 0.06, PW 0.24.
COLOR Major: mesosoma, waist, and anterior strip of first gastral tergite yellowish brown; head and rest of gaster medium brown; appendages medium yellow.
Minor: concolorous dark yellow.
Both castes are sometimes much darker in shade.
Figure. Upper: holotype, major. Lower: paratype, minor. Scale bars = 1 mm.
PERU: Cuzco Amazónico, 15 km northeast of Puerto Maldonado, Madre de Dios, col. Stefan P. Cover and John E. Tobin. Museum of Comparative Zoology
Gr cardiella, little heart, referring to the head shape of the major.
- Wilson, E. O. 2003. Pheidole in the New World: A dominant, hyperdiverse ant genus. Harvard University Press, Cambridge, MA. (page 390, fig. major, minor described)