Abstract
Large collections of strophomenacean brachiopods from many Ordovician and Silurian localities have been searched for specimens with uneroded beaks. A few have been found, and these have been prepared in sagittal section. The apical cavity is found to have no primal exterior opening. Therefore it cannot be interpreted as a vestigial pedicle foramen. It seems, rather, to be a vacuity formed for no special function but merely incidentally during the early stages of shell making.
Full Text 
Sign-in/Register to access full text options
Sign-in/Register to access full text options 
Published version (
Free)
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
