Arthropods are the most diverse animal phylum, and their phylogenetic relationships have
been debated for centuries. With the advent of molecular phylogenetics, arthropods were …

Fossil age data and molecular sequences are increasingly combined to establish a
timescale for the Tree of Life. Arthropods, as the most species-rich and morphologically …

Horseshoe crabs (Xiphosura) are traditionally regarded as sister group to the clade of
terrestrial chelicerates (Arachnida). This hypothesis has been challenged by recent …

Chelicerata represents one of the oldest groups of arthropods, with a fossil record extending
to the Cambrian, and is sister group to the remaining extant arthropods, the mandibulates …

Fossil spiders have not been fully cataloged since Bonnet's Bibliographia Araneorum and
are not included in the current Catalog. Since Bonnet's time there has been considerable …

Understanding animal terrestrialization, the process through which animals colonized the
land, is crucial to clarify extant biodiversity and biological adaptation. Arthropoda (insects …

Phylogenomics underpins a stable and mostly well-resolved hypothesis for the
interrelationships of extant arthropods. Exceptionally preserved fossils are integrated into …

Xiphosurids are an archaic group of aquatic chelicerate arthropods, generally known by the
colloquial misnomer of 'horseshoe crabs'. Known from marine environments as far back as …

A new horseshoe crab species, Limulus darwini, is described from the uppermost Jurassic
(ca. 148 Ma) near-shore sediments of the Kcynia Formation, central Poland. The only extant …

The rise of arthropods is a decisive event in the history of life. Likely the first animals to have
established themselves on land and in the air, arthropods have pervaded nearly all …