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~ This is the current taxonomic hierarchy for the
Hemichordates and the invertebrate Chordates as outlined in Brusca &
Brusca (pgs. 842-843), and presented in your lab manual. You are
responsible for
knowing only those taxonomic ranks that are highlighted, and the
specimens presented in laboratory representative of each of those ranks.
 Phylum Hemichordata
- Class Enteropneusta - "Acorn Worms"
- Class Pterobranchia
- Class Planctosphaeroidea
Phylum Chordata
- Subphylum Urochordata - "Tunicates"
- Class Ascidiacea
- Class Thaliacea
- Class Appendicularia
- Class Sorberacea
- Subphylum Cephalochordata - "Lancelets"
~ Here are links to sites with taxonomic
information about Hemichordates and/or the invertebrate Chordates, or
alternate hierachies for these groups.
"Tree of Life", David R. and
Wayne P. Maddison
Taxonomic Hierachy,
Zoological Record
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