Dear colleagues,

Mediterranean and West African coastal molluscs have an undeniable
affinity, which becomes even more evident when studying the Quaternary
fossil record (during previous interglacials this sea was quite warm).
 Here in the Balearics we do have great outcrops, so I have been looking at
this problem.  I would greatly appreciate any opinions, references or ideas
about the distinctness or validity of species pairs that occur in the
Mediterranean and along the "Senegalian" shores: I can think about examples
in the genera Xenophora (crispa/senegalensis), Luria (the  true lurida/a
slighltly more elongated form), Thais...

Thank you all in advance!

Cristian R. Altaba