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

Systematics has developed rapidly during the past two decades. A multitude of new
methods and contributions from a diversity of biological fields including molecular genetics …

Although flourishing, I argue that evo-devo is not yet a mature scientific discipline. Its
philosophical foundation exhibits an internal inconsistency that results from a metaphysical …

Twenty years after its proposal, the monophyly of molting protostomes—Ecdysozoa—is a
well-corroborated hypothesis, but the interrelationships of its major subclades are more …

Moulting is a characteristic feature of Ecdysozoa—the clade of moulting animals that
includes the hyperdiverse arthropods and less speciose groups, such as onychophorans …

Background Published molecular phylogenies are usually based on data whose quality has
not been explored prior to tree inference. This leads to errors because trees obtained with …

The systematics of nematodes is reviewed, including: an overview of the general biology,
ecology, scientific and economic importance of the group; a history of classification; …

With millions of extant species, ecdysozoans (Scalidophora, Nematoida and Panarthropoda)
constitute a major portion of present-day biodiversity. All ecdysozoans secrete an …

Onychophora (velvet worms) play a crucial role in current discussions on position of
arthropods. The ongoing Articulata/Ecdysozoa debate is in need of additional ground …

Animal phylogeny is undergoing a major revolution due to the availability of an
exponentially increasing amount of molecular data and the application of novel methods of …