Authors of a new study suggest that 520-million-year-old structures, previously identified as the brains of ancient arthropods, are instead preserved microbial biofilms.

The chelicerates’ unique anatomical features make them useful analogs to extinct arthropods.

Scientists study the unusual genome evolution of the bacteria that live within a genus of cicadas. 

Scientists explore why male peacock spiders are so colorful. 

Scientists have developed a computer tomography device capable of visualizing objects at nanoscale. 

This lifelike replica of the one-centimeter, 500-million-year-old arthropod Agnostus pisiformis was reconstructed from the animal’s ancient fossils.

The genomes of two species of water bears reveal clues about how they persist in extreme conditions, yet don’t resolve the animals’ debated evolutionary story.

The average US household contains 62 distinct families of arthropod species, according to an entomological census.

Exceptional neural fossil preservation helps answer questions about ancient arthropod evolution.

Phylogenetic analysis of DNA isolated from human hair follicle–dwelling mites shows that different lineages of the arthropods are associated with hosts with different regional ancestries.