Pheidole Cervicornis
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''Pheidole'' is a
genus Genus ( plural genera ) is a taxonomic rank used in the biological classification of extant taxon, living and fossil organisms as well as Virus classification#ICTV classification, viruses. In the hierarchy of biological classification, genus com ...
of
ant Ants are eusocial insects of the family Formicidae and, along with the related wasps and bees, belong to the order Hymenoptera. Ants evolved from vespoid wasp ancestors in the Cretaceous period. More than 13,800 of an estimated total of 22 ...
s that belongs to the ant subfamily
Myrmicinae Myrmicinae is a subfamily of ants, with about 140 extant genera; their distribution is cosmopolitan. The pupae lack cocoons. Some species retain a functional sting. The petioles of Myrmicinae consist of two nodes. The nests are permanent and ...
. The genus is widespread and ecologically dominant. It probably includes more than 1000 species. The genus first evolved in the Americas, eventually spreading across the globe.


Colony structure

Most species of ''Pheidole'' are dimorphic, which means that colonies contain two castes of workers, the "minor" workers, and the "major" workers, or "soldiers". The latter generally have much larger heads and mandibles in comparison to their usually fairly modest body size. In addition, as in other ant species, a colony may contain one or several
queens Queens is a borough of New York City, coextensive with Queens County, in the U.S. state of New York. Located on Long Island, it is the largest New York City borough by area. It is bordered by the borough of Brooklyn at the western tip of Long ...
, and also in mature colonies,
alate Alate (Latin ''ālātus'', from ''āla'' (“wing”)) is an adjective and noun used in entomology and botany to refer to something that has wings or winglike structures. In entomology In entomology, "alate" usually refers to the winged form o ...
s - virgin winged females and males. Pheidole_xerophila-major_minors.jpg, major and minor workers of ''P. xerophila''


Major workers

The distinctive major workers have earned the genus ''Pheidole'' the nickname of "big-headed ants". The major workers of a ''Pheidole'' colony, while they may look fierce, are often quite shy and are often the first to flee on any hint of danger. Many ''Pheidole'' species are the prey of
parasitoid In evolutionary ecology, a parasitoid is an organism that lives in close association with its host (biology), host at the host's expense, eventually resulting in the death of the host. Parasitoidism is one of six major evolutionarily stable str ...
phorid flies that lay their eggs on the major workers; the fly
larva A larva (; plural larvae ) is a distinct juvenile form many animals undergo before metamorphosis into adults. Animals with indirect development such as insects, amphibians, or cnidarians typically have a larval phase of their life cycle. The ...
e grow mainly in the head capsules of the victims, eventually decapitating them, and probably would starve in the bodies of minor workers. In most cases, the major workers are employed within the nest to break up large food items, or outside to carry large items, such as seeds; many ''Pheidole'' species are ecologically important seed consumers ("
harvesters Harvester may refer to: Agriculture and forestry * Combine harvester, a machine commonly used to harvest grain crops * Forage harvester, a machine used to harvest forage * Harvester (forestry), a type of heavy vehicle employed in cut-to-length lo ...
").


Species list

The genus contains over 1,000 species. They include: * '' Pheidole acutidens'' * '' Pheidole argentina'' * '' Pheidole barreleti'' * '' Pheidole bicarinata'' * '' Pheidole bigote'' * '' Pheidole branstetteri'' * '' Pheidole braueri'' * '' Pheidole bula'' * '' Pheidole carinote'' * '' Pheidole cervicornis'' * '' Pheidole ceylonica'' * '' Pheidole clavata'' * '' Pheidole debilis'' * ''
Pheidole decepticon ''Pheidole'' is a genus of ants that belongs to the ant subfamily Myrmicinae. The genus is widespread and ecologically dominant. It probably includes more than 1000 species. The genus first evolved in the Americas, eventually spreading across th ...
'' * ''
Pheidole dentata ''Pheidole dentata'' is a species of ant in the subfamily Myrmicinae. It is distributed in North America, from the Mid-Atlantic states and southeastern United States to Mexico. Neurochemistry ''P. dentata'' takes on more and more tasks in the ...
'' * '' Pheidole diffidens'' * '' Pheidole dodo'' * '' Pheidole elecebra'' * '' Pheidole elongicephala'' * '' Pheidole eowilsoni'' * '' Pheidole epiphyta'' * '' Pheidole fervens'' * '' Pheidole fossimandibula'' * '' Pheidole gracilipes'' * '' Pheidole gymnoceras'' * '' Pheidole harlequina'' * ''
Pheidole harrisonfordi ''Pheidole harrisonfordi'' is a species of ant in the genus ''Pheidole''. ''P. harrisonfordi'' lives in the Americas, mostly in neotropical countries such as Belize, Colombia, southern Mexico, Panama, Guatemala and other central American nations. ...
'' * '' Pheidole horni'' * '' Pheidole inquilina'' * '' Pheidole janzeni'' * '' Pheidole jonas'' * '' Pheidole karolmorae'' * '' Pheidole karolsetosa'' * '' Pheidole komori'' * '' Pheidole laevithorax'' * '' Pheidole lagunculinoda'' * '' Pheidole lanuginosa'' * '' Pheidole latinoda'' * '' Pheidole leoncortesi'' * '' Pheidole loki'' * '' Pheidole malinsii'' * ''
Pheidole megacephala ''Pheidole megacephala'' is a species of ant in the family Formicidae. It is commonly known as the big-headed ant in the USA and the coastal brown ant in Australia. It is a very successful invasive species and is considered a danger to native ant ...
'' * '' Pheidole megatron'' * '' Pheidole microgyna'' * '' Pheidole neokohli'' * '' Pheidole nietneri'' * '' Pheidole noda'' * '' Pheidole obtusospinosa * '' Pheidole ochracea'' * '' Pheidole oculata'' * ''
Pheidole pallidula ''Pheidole pallidula'' is a species of ant in the genus ''Pheidole''. It is widespread around the Mediterranean The Mediterranean Sea is a sea connected to the Atlantic Ocean, surrounded by the Mediterranean Basin and almost completely e ...
'' * '' Pheidole pararugiceps'' * '' Pheidole parasitica'' * '' Pheidole parva'' * '' Pheidole pegasus'' * '' Pheidole phanigaster'' * '' Pheidole picobarva'' * '' Pheidole pronotalis'' * '' Pheidole psilogaster'' * '' Pheidole purpurea'' * '' Pheidole ragnax'' * '' Pheidole rhinomontana'' * '' Pheidole rugithorax'' * '' Pheidole rugosa'' * ''
Pheidole sebofila ''Pheidole sebofila'' is a species of ant in the genus ''Pheidole ''Pheidole'' is a genus of ants that belongs to the ant subfamily Myrmicinae. The genus is widespread and ecologically dominant. It probably includes more than 1000 species. Th ...
'' * '' Pheidole simplispinosa'' * '' Pheidole spathifera'' * '' Pheidole sulcaticeps'' * '' Pheidole symbiotica'' * '' Pheidole templaria'' * '' Pheidole teneriffana'' * '' Pheidole uncagena'' * '' Pheidole vieti'' * '' Pheidole vulcan'' * '' Pheidole xerophila''


References


External links

*
Myrmecos.net images of live ''Pheidole''gallery of ''Pheidole'' specimen images
on Antweb.org {{Taxonbar, from=Q138173 Myrmicinae Ant genera