Accumulated records of organic microfossils span billions of years of Earth history. The
majority of this record consists of prokaryotes plus eukaryotes of a protistan grade, yet this …

Phylogenomics reconstructs an arthropod tree in which a monophyletic A rthropoda splits
into P ycnogonida+ E uchelicerata and M yriapoda+ P ancrustacea. The same chelicerate …

Understanding the way in which animals diversified and radiated during their early
evolutionary history remains one of the most captivating of scientific challenges. Integral to …

Ecdysis, the process of moulting an exoskeleton, is one of the key characters uniting
arthropods, nematodes and a number of smaller phyla into Ecdysozoa. The arthropod fossil …

An assemblage of mineralised skeletal fossils containing molluscs, hyoliths, halkieriids,
chancelloriids, tommotiids, lobopodians, paleoscolecids, bradoriids, echinoderms …

Abstract The Palaeozoic form-taxon Lobopodia encompasses a diverse range of soft-bodied
'legged worms' known from exceptional fossil deposits 1, 2, 3, 4, 5, 6, 7, 8, 9. Although …

We describe Collinsium ciliosum from the early Cambrian Xiaoshiba Lagerstätte in South
China, an armored lobopodian with a remarkable degree of limb differentiation including a …

Gnathobasic spines are located on the protopodal segments of the appendages of various
euarthropod taxa, notably chelicerates. Although they are used to crush shells and masticate …

A lack of well resolved biostratigraphic data has prevented robust regional and global
correlation of lower Cambrian successions from South Australia. A new early Cambrian …

The stem‐group priapulid Ottoia Walcott, 1911, is the most abundant worm in the mid‐
Cambrian Burgess Shale, but has not been unambiguously demonstrated elsewhere. High …