| Pheidole polymorpha|
Collected in upland desert. Comment by Stefan Cover (personal communication): “A very interesting beast; it is like Pheidole artemisia (=Pheidole pilifera) or Pheidole cavigenis on steroids.” (Wilson 2003)
See the description in the nomenclature section.
Keys including this Species
Known only from the type locality and from Chapulco, Puebla, Mexico. (Wilson 2003)
Distribution based on Regional Taxon Lists
Distribution based on AntMaps
Distribution based on AntWeb specimens
Check data from AntWeb
The following information is derived from Barry Bolton's New General Catalogue, a catalogue of the world's ants.
- polymorpha. Pheidole polymorpha Wilson, 2003: 592, figs. (s.w.) MEXICO.
Unless otherwise noted the text for the remainder of this section is reported from the publication that includes the original description.
DIAGNOSIS A member of the “pilifera complex” of the larger pilifera group, comprising Pheidole calens, Pheidole californica, Pheidole carrolli, Pheidole cavigenis, Pheidole clementensis, Pheidole creightoni, Pheidole hoplitica, Pheidole littoralis, Pheidole micula, Pheidole pilifera, Pheidole polymorpha, Pheidole rugulosa, Pheidole senex, Pheidole soritis, Pheidole tepicana and Pheidole torosa, which complex is distinguished by the following traits. Major: dorsal head surface extensively sculptured; occipital lobes transversely rugulose (or, in carrolli smooth, in littoralis foveate, and in micula and soritis carinulate); postpetiole from above diamond-shaped, trapezoidal, or spinose. Minor: eye medium-sized to large.
P. polymorpha is distinguished within the complex by the following combination of traits. Worker caste trimorphic, with major, supermajor, and minor.
Major: humerus very pronounced and subtriangular in shape in dorsal-oblique view; propodeal spines stout and vertical to the basal propodeal face; postpetiole from above with sharp right-angular margins; pilosity, long and dense.
Minor: all of mesosoma and almost all of the dorsal head surface foveolate and opaque.
Both major and minor: dorsal margin of petiole seen from behind strongly convex.
MEASUREMENTS (mm) Holotype major: HW 1.34, HL 1.46, SL 0.62, EL 0.20, PW 0.60. Paratype minor: HW 0.54, HL 0.60, SL 0.56, EL 0.14, PW 0.38.
COLOR Major and minor: brownish yellow.
Figure. Upper: holotype, major; partial head in full-face view of paratype, supermajor. Lower: paratype, minor. Scale bars = 1 mm.
From Wilson (2003): MEXICO: Highway 57, km 127, Estado México, col. Cornell University Field Party, 1965. Museum of Comparative Zoology
Gr polymorpha, many forms, referring to the coexistence of major and supermajor castes.
- Wilson, E. O. 2003. Pheidole in the New World: A dominant, hyperdiverse ant genus. Harvard University Press, Cambridge, MA. (page 592, fig. major, minor described)