Dear Mollusc-experts,



It may be our traditional understanding that the anterior and posterior ends
of clam-shaped sand-digging bivalves correspond with foot and siphon,
respectively. These clams stay upside-down or bottom-end-up, so to speak,
buried in sediments. Now, I wonder if this anterior-posterior system did
correspond with the hox-gene expression in this group. Did anyone ever
clarify this question?



Masashi Yamaguchi
Faculty of Science
Univ. of the Ryukyus
Nishihara, Okinawa
903-0213  Japan