Ants that seem to defy biology – They lay eggs that hatch into another species (smithsonianmag.com)

Article summary

Iberian harvester ant queens have been found to lay eggs that hatch into another species, the builder harvester ant, in a phenomenon that challenges traditional notions of biology and species definition. This occurs when the Iberian harvester ant queen mates with a builder harvester ant male and uses his sperm to fertilize some of her eggs, while removing her own genetic material to produce clones of the male. The queens also produce hybrid female worker ants and males of their own species. This unique reproductive strategy allows the Iberian harvester ant to ensure a steady supply of workers and maintain its population.

Main themes

• Ant biology
• Species definition
• Reproductive strategies
• Genetics
• Evolutionary adaptations
• Symbiotic relationships

What commenters say

• The ability of Iberian harvester ant queens to produce clones of another species is a unique and fascinating example of evolutionary adaptation.
• The phenomenon of parthenogenesis, or virgin birth, is more common in the animal kingdom than previously thought, and is not limited to certain species.
• The idea that species must be reproductively isolated from one another is being challenged by discoveries like this, which show that some species can interbreed and produce viable offspring.
• The relationship between the Iberian harvester ant and the builder harvester ant may be symbiotic, with the Iberian harvester ant benefiting from the hybrid worker ants produced by the union.
• The mechanism by which the Iberian harvester ant queen removes her own genetic material from the eggs is not fully understood and requires further study.
• The discovery of this phenomenon has implications for our understanding of species definition and the boundaries between different species.
• Some commenters question whether the relationship between the two ant species is truly symbiotic, or if it is instead a form of exploitation by one species of the other.
• The ability of some species to change sex or reproduce without mates challenges traditional notions of biology and forces a reevaluation of our understanding of the natural world.