[Annelida] Polychaeta and Sipunculida.

Fomin Alexey.A. via annelida%40net.bio.net (by lesha74 from rambler.ru)
Tue Aug 12 12:13:57 EST 2008


Whether you can help estimate how long ago the last common ancestor of
Polychaeta or Sipunculida lived ("crown group")?
I try construct the diagram of classis amount as function of time (diagram
of dependence N=f(t), where N - amount of Existing classis at time t).
Unfortunately I am not biologist and can not in any way find some points (in
paticular - Polychaeta and Sipunculida ).
Or may by you know who it know?
Whether you can give subjective astimation of it time?

Beforehand thanks,
Fomin Alexey.

More information about the Annelida mailing list