title: Pristina leidyi mixed-stage regeneration &amp; fission sample
organism: Pristina leidyi
description: The material for this sample came from ~1,000 fissioning worms and ~3,500 regenerating worms.  Worms derive from a clonal line of Pristina leidy (clone A, established from a single founding worm), originally derived from a culture obtained from Carolina Biological Supply Company.  Anteriorly and posteriorly regenerating specimens were collected 0-3.5 days after amputation.  Fissioning specimens were collected from actively, asynchronously growing cultures and represent all fission stages.