Deuterostomes are the major division of animal life which includes sea stars, acorn worms,
and humans, among a wide variety of ecologically and morphologically disparate taxa …

The question of whether the ancestral bilaterian had a central nervous system (CNS) or a
diffuse ectodermal nervous system has been hotly debated. Considerable evidence …

Summary Ambulacraria, comprising Hemichordata and Echinodermata [1], is closely related
to Chordata, making it integral to understanding chordate origins and polarizing chordate …

Bathymetric biodiversity patterns of marine benthic invertebrates and demersal fishes have
been identified in the extant fauna of the deep continental margins. Depth zonation is …

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

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

Hemichordates are a marine group that, apart from one monospecific pelagic larval form, are
represented by the vermiform enteropneusts and minute colonial tube-dwelling …

Echinoderms are unique in being pentaradiate, having diverged from the ancestral
bilaterian body plan more radically than any other animal phylum. This transformation arises …

Our understanding of vertebrate origins and the backbone of human history evolves with
each new fossil find and DNA map. Many species have now had their genomes sequenced …

Hemichordates are a deuterostome phylum, the sister group to echinoderms, and closely
related to chordates. They have thus been used to gain insights into the origins of …