Pheidole dentata

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Pheidole dentata
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Hymenoptera
Family: Formicidae
Subfamily: Myrmicinae
Tribe: Attini
Genus: Pheidole
Species: P. dentata
Binomial name
Pheidole dentata
Mayr, 1886

Pheidole dentata casent0103882 profile 1.jpg

Pheidole dentata casent0103882 dorsal 1.jpg

Specimen Label

Synonyms

In the southeastern United States, where I have observed the species (or complex of sibling species) over many years, colonies of dentata occur in a wide range of habitats, from relatively thick coniferous and deciduous woodland to beaches and even city streets. They prefer to nest in rotting logs and stumps, but also readily occupy soil beneath pieces of rotting wood and in open ground. In Pensacola, Florida, I found them one of the commonest ants in and around concrete sidewalks. Similar versatility has been reported elsewhere in Florida by Naves (1985) and in western Texas by Moody and Francke (1982). I have found dentata to be an easily collected and managed species for laboratory studies, having used colonies to demonstrate enemy specification in alarm-defense communication (Wilson 1975d, 1976a) and the fixed nature of major-minor ratios even in the face of intense predator pressure (Johnston and Wilson 1985). Laboratory colonies feed voraciously and thrive on insects and sugar, growing to maturity within a year or so. G. C. and J. Wheeler (1953b) have provided a description of the larvae of all castes and instars. (Wilson 2003) It is known to remove (Atchison & Lucky, 2022; Cumberland & Kirkman, 2010; Stamp & Lucas, 1990; Stuble et al., 2010) and disperse (Giladi, 2004) seeds.


Photo Gallery

  • A Pheidole dentata minor worker tending Entylia treehopper nymphs for honeydew. Texas, USA. Photo by Alex Wild.

Identification

See the description in the nomenclature section.

Keys including this Species

Distribution

This very adaptable and abundant ant is known to occur from Calvert County, Maryland, south to the Florida Keys, west to Illinois, Kansas, El Paso and the Davis Mountains of Texas, thence south to northern Mexico (Monterrey, Nuevo Leon). (Wilson 2003)

Latitudinal Distribution Pattern

Latitudinal Range: 38.99° to 4.596958°.

     
North
Temperate
North
Subtropical
Tropical South
Subtropical
South
Temperate

Distribution based on Regional Taxon Lists

Nearctic Region: United States (type locality).
Neotropical Region: Mexico.

Distribution based on AntMaps

AntMapLegend.png

Distribution based on AntWeb specimens

Check data from AntWeb

Countries Occupied

Number of countries occupied by this species based on AntWiki Regional Taxon Lists. In general, fewer countries occupied indicates a narrower range, while more countries indicates a more widespread species.
pChart

Biology

Flight Period

X X X
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Source: antkeeping.info.

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Association with Other Organisms

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  • This species is a host for the eucharitid wasp Orasema achkola (a parasite) (Heraty, 1994; Baker et al., 2019).
  • This species is a host for the eucharitid wasp Orasema evansi (a parasite) (Burks et al., 2018; Baker et al., 2019; Universal Chalcidoidea Database) (primary host).
  • This species is a host for the eucharitid wasp Orasema robertsoni (a parasite) (Van Pelt, 1950; Baker et al., 2019; Universal Chalcidoidea Database) (primary host).
  • This species is a host for the eucharitid wasp Orasema sp. c1 near costari. (a parasitoid) (Quevillon, 2018) (encounter mode independent; direct transmission; transmission outside nest).
  • This species is a host for the eucharitid wasp Orasema sp.1 (a parasitoid) (Quevillon, 2018) (encounter mode independent; direct transmission; transmission outside nest).
  • This species is a host for the eucharitid wasp Orasema viridis (a parasitoid) (Quevillon, 2018) (encounter mode independent; direct transmission; transmission outside nest).
  • This species is a host for the eucharitid wasp Orasema wheeleri (a parasitoid) (Quevillon, 2018) (encounter mode independent; direct transmission; transmission outside nest).
  • This species is a host for the phorid fly Apocephalus feeneri (a parasitoid) (Quevillon, 2018) (encounter mode primary; direct transmission; transmission outside nest).
  • This species is a host for the phorid fly Apocephalus sp. (a parasitoid) (Quevillon, 2018) (encounter mode primary; direct transmission; transmission outside nest).
  • This species is a host for the phorid fly Apocephalus tenuipes (a parasitoid) (Quevillon, 2018) (encounter mode primary; direct transmission; transmission outside nest).
  • This species is a prey for the syrphid fly Serichlamys (a predator) (Quevillon, 2018).
  • This species is a host for the nematode Mermithidae (unspecified "Mermix") (a parasite) in Texas, United States (Wheeler, 1901; Wheeler, 1928; Laciny, 2021) (as Pheidole commutata).
  • This species is a host for the cestode Raillietina tetragona (a parasitoid) (Quevillon, 2018) (encounter mode secondary; indirect transmission; transmission outside nest).

Life History Traits

  • Queen number: monogynous (Frumhoff & Ward, 1992)

Castes

Worker

Minor

Images from AntWeb

Pheidole dentata casent0104240 head 1.jpgPheidole dentata casent0104240 profile 1.jpgPheidole dentata casent0104240 profile 2.jpgPheidole dentata casent0104240 dorsal 1.jpgPheidole dentata casent0104240 label 1.jpg
Worker. Specimen code casent0104240. Photographer April Nobile, uploaded by California Academy of Sciences. Owned by ABS, Lake Placid, FL, USA.

Major

Images from AntWeb

Pheidole dentata casent0103882 head 1.jpgPheidole dentata casent0103882 profile 1.jpgPheidole dentata casent0103882 dorsal 1.jpgPheidole dentata casent0103882 label 1.jpg
Worker (major/soldier). Specimen code casent0103882. Photographer April Nobile, uploaded by California Academy of Sciences. Owned by ABS, Lake Placid, FL, USA.

Queen

Images from AntWeb

Pheidole dentata casent0103883 head 1.jpgPheidole dentata casent0103883 profile 1.jpgPheidole dentata casent0103883 dorsal 1.jpgPheidole dentata casent0103883 label 1.jpg
Queen (alate/dealate). Specimen code casent0103883. Photographer April Nobile, uploaded by California Academy of Sciences. Owned by ABS, Lake Placid, FL, USA.

Male

Images from AntWeb

Pheidole dentata casent0103872 head 1.jpgPheidole dentata casent0103872 profile 1.jpgPheidole dentata casent0103872 profile 2.jpgPheidole dentata casent0103872 dorsal 1.jpgPheidole dentata casent0103872 label 1.jpg
Male (alate). Specimen code casent0103872. Photographer April Nobile, uploaded by California Academy of Sciences. Owned by ABS, Lake Placid, FL, USA.

Larva

Wheeler and wheeler 1953 plate III.jpg

Wheeler, G. C. and J. Wheeler. 1953. Plate III, figs. 1-14. 1, head in anterior view, X105; 2, very young larva in side view, X31; 3, mature worker larva in side view, X31; 4, left mandible in anterior view, X202; 5, left mandible in medial view, X202; 6, profile of queen larva, X9; 7, profile of male larva, X9; 8, profile of sold,ier larva, X9; 9, profile of worker larva, X9; 10, profile of immature sexual larva, X9; 11, mature worker larva in ventral view X31; 12-14, three body hairs from worker larva, X185.

Nomenclature

The following information is derived from Barry Bolton's Online Catalogue of the Ants of the World.

  • commutata. Pheidole commutata Mayr, 1886d: 459 (s.w.) U.S.A. Subspecies of dentata: Forel, 1901e: 352; Wheeler, W.M. 1908e: 460. Revived status as species: Emery, 1922e: 104. Senior synonym of tennesseensis: Cole, 1948: 82. Junior synonym of dentata: Creighton, 1950a: 178.
  • dentata. Pheidole morrisi var. dentata Mayr, 1886d: 457 (s.w.m.) U.S.A. Forel, 1901e: 351 (q.); Wheeler, G.C. & Wheeler, J. 1953b: 71 (l.); Crozier, 1970: 117 (k.). Raised to species: Forel, 1901e: 351. Senior synonym of faisonsica, commutata (and its junior synonym tennesseensis): Creighton, 1950a: 178. See also: Wilson, 1976b: 63; Wilson, 2003: 282.
  • faisonsica. Pheidole dentata var. faisonsica Forel, 1901e: 352 (s.w.) U.S.A. Junior synonym of dentata: Creighton, 1950a: 178.
  • tennesseensis. Leptothorax tennesseensis Cole, 1938a: 238, fig. 1 (w.) U.S.A. Junior synonym of commutata: Cole, 1948: 82.

Type Material

Naturhistorisches Museum Wien, Vienna - as reported in Wilson (2003) Unless otherwise noted the text for the remainder of this section is reported from the publication that includes the original description.

Description

From Wilson (2003): A member of the fallax group similar in various characters to Pheidole bergi, Pheidole chiapasana, Pheidole cordiceps, Pheidole dione, Pheidole humeridens, Pheidole industa, Pheidole laevivertex, Pheidole madrensis, Pheidole maja, Pheidole nitidula and Pheidole tetroides, and distinguished as follows.

Major: rugoreticulum of head placed next to antennal fossa in advance of eye level; carinulae of frontal lobes mostly limited to margins of the lobes and extending posteriorly to the level of the eyes only by an Eye Length; occipital margin in full-face view deeply concave; occipital corners smoothly rounded, almost semicircular; humerus and mesonotal convexity low and smooth, rounded in profile; apex of petiolar node in side view strongly tapered; postpetiole from above elliptical, with bluntly angular lateral margins; promesonotal dorsum completely smooth.

Minor: propodeal spines reduced almost to denticles; petiolar and postpetiolar nodes in side view very low; occipital margin in full-face view very feebly concave.

MEASUREMENTS (mm) Major (Wakulla Springs State Park, Florida): HW 1.14, HL 1.26, SL 0.84, EL 0.22, PW 0.60. Minor (Wakulla Springs State Park): HW 0.58, HL 0.66, SL 0.74, EL 0.14, PW 0.38.

COLOR Coloration and size vary greatly, as described by Naves (1985) in Florida: “I have found colonies of small dark specimens in wooded areas around Gainesville and large specimens that nest in sandy soil on beaches in south Florida and the Florida Keys. I also found a yellowish variant that inhabits the marshlands of the Keys and another variant with quite large majors that vary in color from reddish to very dark brown nesting in open areas around Gainesville.” Naves believes that all of the variation is of a single species. On the other hand, Stefan Cover has provided the following suggestive observations that may point toward multiple sibling species: “Variation similar to that reported by Naves in Florida is present throughout much of dentata’s range. In many places in the southeastern United States, there are lighter colored open-ground forms and darker forest-inhabiting forms. In at least one case there are associated life-history differences. The typical dark, forest-inhabiting form common in the southeast produces monogynous colonies containing several hundred individuals. In Calvert Co., Maryland, at the northeastern extremity of its range, only a light colored open-ground form is present. It forms polygynous colonies often containing over 5,000 ants. This strongly suggests dentata may be a sibling species cluster like the Aphaenogaster rudis complex.”


Pheidole dentata Wilson 2003.jpg

Figure. Upper: major. Lower: minor. Scale bars = 1 mm.

Karyotype

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  • 2n = 20 (USA) (Crozier, 1970b).

Etymology

L dentata, toothed, presumably referring to the propodeal spines. (Wilson 2003)

References

References based on Global Ant Biodiversity Informatics

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