Meanings of true spiders in English

Camel spiders are arachnids like true spiders, but they belong to a different order, solifugae.

Their single, fused body region most distinguishes them from true spiders, which have two main body parts.

Emphasizing a dense sampling of multiple araneomorph lineages where tracheal systems likely originated, we gathered genomic-scale data and reconstructed a phylogeny of true spiders.