In recent years, scientists have made remarkable progress reconstructing the animal
phylogeny. There is broad agreement regarding many deep animal relationships, including …

The Cambrian appearance of fossils representing diverse phyla has long inspired
hypotheses about possible genetic or environmental catalysts of early animal evolution …

The range of DNA sequences used to study the interrelationships of the major arthropod
groups (chelicerates, myriapods, hexapods and crustaceans) is limited. Here we investigate …

Phylogenomic studies have improved understanding of deep metazoan phylogeny and
show promise for resolving incongruences among analyses based on limited numbers of …

The arthropods constitute the most diverse animal group, but, despite their rich fossil record
and a century of study, their phylogenetic relationships remain unclear1. Taxa previously …

A new classification of the Brachiopoda is proposed to take into account recent advances in
our understanding of the anatomy, shell morphology, ontogeny and phylogeny of the …

Metazoa comprises 35–40 phyla that include some 1.3 million described species.
Phylogenetic analyses of metazoan interrelationships have progressed in the past two …

▪ Abstract Molecular tools have profoundly rearranged our understanding of metazoan
phylogeny. Initially based on the nuclear small ribosomal subunit (SSU or 18S) gene, recent …

ABSTRACT Al/~(. r%,, JS 2000. Sj~ uc. ir:\cliv~ rt ily cind pltyloger~ elic syslmrnric:.,(f A mc.
ric. on knif~/ish~~, s (($ tr~ nolz/i, r. tnc~,'lP1uoski). Misc. I'ubl. Mu.\. Zool. Ilttin Michiyccrr …

Reefs containing abundant calcified metazoans occur at several stratigraphic levels within
carbonate platforms of the terminal Proterozoic Nama Group, central and southern Namibia …