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Clade Deuterostomia (Body Systems (triploblastic, bilateral symmetry,…
Clade Deuterostomia
Body Systems
triploblastic
bilateral symmetry
gastrolation
tissues
parahox/hox genes
multicellular
eukaryotic
ingestive heterotrophy
Body Structures
in Hemichordata*
3 body regions
proboscis
collar
trunk
ciliated epidermis
chordate-like characteristcs
pharyngeal gill slits
dorsal hollow nerve cord
echinoderm-like characteristics
tornaria larvae similar to bipinnaria
Taxonomic Divisions
sister clades
Clade Ambulacraria
Phylum Hemichordata
acorn or tongue worms
Phylum Echinodermata
echinoderms
mostly united by shared gene families & DNA sequences
larvae of two groups are similar
Clade Chordata
Reproduction
Development
radial, indeterminate cell cleavage
enterocoely
blastopore develops into anus