Amphioxus Development

Lacalli: 1995 
Antecedents of Vertebrate Eye and Brain: Evidence from serial EM studies of amphioxus larvae. 
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Lacalli TC.

Int J Dev Biol. 2000 Dec;44(8):903-6.PMID: 11206331

Cell morphology in amphioxus nerve cord may reflect the time course of cell differentiation.
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The history of a developmental stage: metamorphosis in chordates.