rising@zoo.toronto.edu (Jim Rising) (06/07/91)
Lampshells very close in appearance to modern Lingula are found in the Burgess Shale (Cambrian). Whether or not they're put into a different genus is in part a matter of interpretation, but certainly that morphology has been very conservative. Their habitat (muddy bottom of shallow sea) has also been around for a long time, probably little changed in physical aspects. -- Name: Jim Rising Mail: Dept. Zoology, Univ. Toronto, Toronto, Ontario, Canada M5S 1A1 UUCP: uunet!attcan!utzoo!rising BITNET: rising@zoo.utoronto.ca