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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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