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Hemichordates
Taxonomy & Anatomy
10
Biology
Undergraduate 4
12/05/2013

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Term
P. Hemichordata
Definition
Pharyngeal gill slits & dorsal hollow nerve cord, but lack notochord
Term
C. Enteropneusta
Definition
Acorn worms
Term
C. Pterobranchia
Definition
Colonial hemichordates
Term
P. Chaetognatha
Definition
Arrow worms
Term
Subphylum Urochordata
Definition
Tunicates, Salps, Pyrosoma, Larvaceans
Term
C. Asidiacea
Definition
Tunicates
Term
C. Thaliacea
Definition
Salps, Doliolina, Pyrosomes
Term
C. Larvacea
Definition
Larvaceans
Term
Subphylum Cephalochordata
Definition
Lancelets
Term
Endostyle
Definition
Tunicates; always ventral; analogous to thyroid gland; secretes iodine net over internal organs
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