pheidole
awild | August 5, 2009Doesn't "bigote" mean "moustache" in Spanish?
Why, yes. It does.
Pheidole bigote Longino 2009
Chiapas, Mexico
The inimitable Jack Longino published a taxonomic paper today on the Central American Pheidole, including descriptions of some 23 new species. Among these is the marvelously moustached P. bigote. The function of the fantastic facial hair remains unknown.
source: Longino, J. T. 2009. Additions to the taxonomy of New World Pheidole (Hymenoptera: Formicidae). Zootaxa 2181: 1-90.Â
awild | June 15, 2009A recent study by Gabriela Pirk in Insectes Sociaux provides me with an excuse to share this photo:
Minor workers of the seed harvester Pheidole spininodis (left) and the predatory Pheidole bergi lock jaws in combat. Jujuy, Argentina.
Pirk et al examined the diet of both Pheidole species in the Monte desert of Northern Argentina. Why would someone spend time doing this?  Ants are important dispersers of seeds, and these Pheidole are two of the most abundant seed-eating ants of the region. What they do with the seeds, which ones they choose to take, and how far they take them has…
awild | May 15, 2009Pheidole rosae, major worker, Entre Rios, Argentina
At the nest entrance
photo details: Canon MP-E 65mm 1-5x macro lens on a Canon EOS 20D
ISO 100, 1/250 sec, f/13, flash diffused through tracing paper
awild | February 17, 2009Pheidole dentata, older worker with larva.
A study out in pre-print by Muscedere, Willey, and Traniello in the journal Animal Behaviour finds little support for a long-held idea that worker ants change specializations to perform different types of work as they age. By creating colonies out of different age classes in the ant Pheidole dentata, the researchers showed that older workers were good at pretty much everything, while younger ants performed only a few tasks, but did those less efficiently. Here is the abstract:
Age-related task performance, or temporal polyethism, is a prominent…
awild | January 29, 2009Pheidole moerens, major worker, Louisiana
Pheidole moerens is a small, barely noticeable insect that travels about with human commerce, arriving without announcement and slipping quietly into the leaf litter and potted plants about town.  As introduced ants go, P. moerens is timid and innocuous- it's certainly no fire ant. The species is now present in the southeastern United States, a few places along the west coast, and Hawaii. Conventional wisdom suggests that P. moerens originated in the Greater Antilles, but even though the ant was first described from Puerto Rico a century ago…
awild | October 16, 2008
Pheidole rugithorax Eguchi 2008 - Vietnam
In today's Zootaxa, Katsuyuki Eguchi has a taxonomic revision of the northern Vietnamese Pheidole, recognizing six new ant species for a genus that is already the world's most diverse. The revision also contains several nomeclatural changes and a key to the thirty or so species occurring in the region.
As in most tropical taxonomy this research has a comedic/tragic effect of adding several more species, about which nothing is known, to a catalog already overflowing with equally mysterious species. We don't know what they eat, how long they live,…
awild | September 14, 2008
Pheidole megacephala
Go see!
Incidentally, you might want to surf back here to Myrmecos Blog on Monday afternoon. There's been a very, very exciting discovery...
awild | June 22, 2008A century ago, William Morton Wheeler inked this iconic illustration of the striking polymorphism displayed among members of an ant colony. You may have seen it; Andrew Bourke and Nigel Franks used it as the cover for their 1995 text Social Evolution in Ants.
I always assumed Wheeler's figure depicted some exotic tropical marauder ant, a voracious jungle species with massive soldiers for slicing up hapless prey. I don't read captions carefully enough, I guess, because I learned recently that this charismatic creature is actually a local harvester ant, Pheidole tepicana. Not only that, but…
awild | May 13, 2008
Pheidole pegasus Sarnat 2008
Fiji
Eli Sarnat, the reigning expert on the Ants of Fiji, has just published a lovely taxonomic revision of a group of Pheidole that occur on the islands. Pheidole are found in warmer regions worldwide, but Fiji has seen a remarkable radiation of species that share a bizarre set of spines on the mesosoma. Eli sorted through hundreds of these things to determine that the group contains seven species, five of which had not previously been described. Pheidole pegasus is largest and among the most distinct of the group. It was collected only once, from the…