Our understanding of vertebrate origins is powerfully informed by comparative morphology,
embryology and genomics of chordates, hemichordates and echinoderms, which together …

In 1983, a new theory, the New Head Hypothesis, was generated within the context of the
Tunicate Hypothesis of deuterostome evolution. The New Head Hypothesis comprised four …

Suspension feeders (SFs) evolved a high diversity of mechanisms, sometimes with
remarkably convergent morphologies, to retain plankton, detritus and man-made particles …

Phylonyms is an implementation of PhyloCode, which is a set of principles, rules, and
recommendations governing phylogenetic nomenclature. Nearly 300 clades-lineages of …

Les deutérostomiens sont un groupe monophylétique d'animaux multicellulaires qui inclut
les chordés, un phylum qui possède un plan du corps unique parmi les métazoaires. Les …

Alternation of left and right antimeres of segmental structures, generally known as the glide-
reflection symmetry, was found to be unexpectedly widespread in deuterostomes. It occurs …

We studied the structure of digestive system of deep-sea torquaratorid Quatuoralisia
malakhovi including the food-obtaining apparatus, microanatomy of all regions of digestive …

One important question in evolutionary biology concerns the origin of vertebrates from
invertebrates. The current consensus is that the proximate ancestor of vertebrates was an …

Deuterostomes are a remarkably diverse super-phylum, including not only the chordates (to
which we belong) but groups as disparate as the echinoderms and the hemichordates. The …

Echinoderms are a major group of invertebrate deuterostomes that have been an important
component of marine ecosystems throughout the P hanerozoic. Their fossil record extends …