Systematic Zoology of the Invertebrata

Systematic Zoology: Invertebrates

Contents 1. Introduction to the systematic zoology of the Metazoa (Animalia) 2. Animal phylogeny: data sources and interpretation 2.1 Morphology 2.2 Molecules 2.3 Fossils 3. Systematic zoology of the Metazoa 3. 3.12 Some extant " problematica " 4. Alternative hypotheses of metazoan relationships 4.1 Morphology 4.2 Molecules 5. Reconciliation and pathways to future progress Acknowledgments Gloss...

myths and misconceptions Systematic reviews from astronomy to zoology

http://bmj.com/cgi/content/full/322/7278/98 Updated information and services can be found at: These include: Data supplement http://bmj.com/cgi/content/full/322/7278/98/DC1 "extra references" References http://bmj.com/cgi/content/full/322/7278/98#otherarticles 11 online articles that cite this article can be accessed at: http://bmj.com/cgi/content/full/322/7278/98#BIBL This article cites 15 art...

Systematic reviews from astronomy to zoology: myths and misconceptions.

Zoology: The Walking Heads

An analysis of Hox genes reveals that the body of the adorably weird tardigrades is essentially a truncated front end. This illustrates that loss and simplification are a hallmark of the evolution of animal body plans.

Zoology: War of the Worms

The phylogenetic affinities of Xenacoelomorpha - the phylum comprising Xenoturbella bocki and acoelomorph worms - are debated. Two recent studies conclude they represent the earliest branching bilaterally symmetrical animals, but additional tests may be needed to confirm this notion.