Deuterostome

E.g. the genes are found in sea urchins and other non-vertebrate deuterostome genomes. ❋ Unknown (2010)

This evidence came in only in 2006, but there is actual direct evidence that the transposon-derived ancestors of the RAG genes were in deuterostome genomes * before* they were used to generate receptor diversity. ❋ Unknown (2010)

In a deuterostome, the anus forms before the mouth. ❋ E (2008)

This might end up being re-interpreted as a stem-group deuterostome or even arthropod the latter was my first thought upon seeing the diagrams ❋ Unknown (2006)

This marine worm, first described in 1949 as an acoel flatworm and later claimed as either an early metazoan offshoot or a primitive deuterostome, has recently been affiliated with primitive bivalve molluscs, based upon a study of gamete development oogenesis and an analysis of sequence data from both 18S rRNA and mitochondrial genes. ❋ Unknown (2006)

They are a sister phylum to the chordates, and the similarities and differences between us tell us something about our last common ancestor, the ur-deuterostome. ❋ Unknown (2006)

Continue reading "The evolution of deuterostome gastrulation" on Pharyngula ❋ Unknown (2005)

The evolution of deuterostome gastrulation technical ❋ Peggy (2005)

The evolution of deuterostome gastrulation - The Panda's Thumb ❋ Unknown (2005)

This suggests that maybe nodal was a deuterostome innovation, something that was not used in setting up left and right in the last common ancestor of us animals. ❋ Unknown (2009)

All five predicted sponge WNT proteins showed typical structural characteristics, including a highly conserved cysteine pattern (alignment available upon request) and peptide secretion signals, but their sequences were highly divergent compared to a reference dataset comprising the complete WNT repertoire retrieved from selected deuterostome, protostome and cnidarian genomes. ❋ Pascal Lapébie Et Al. (2009)

This might end up being re-interpreted as a stem-group deuterostome or even arthropod (the latter was my first thought upon seeing the diagrams), which would still be pretty exciting but the creationists and ID proponents would make a pretty big deal out of any possible disagreements of interpretation (ignoring the fact that either way, it’s an important fossil and not at all favorable to their own claims). ❋ Unknown (2006)