Dry Dredgers Field Trip
March 26, 2005
Brookville, Indiana
Page 6: More Brachiopods
Almost everyone found examples in good condition of the articulate brachiopod, Glyptorthis.
Quite a few Dry Dredgers that day were proud finders of the beautiful brachiopod, Hebertella.
The Hebertella can be easily distinguished from the Glyptorthis
by the triangularly shaped hing opening and by one valve (shell) being domed
while the other is a gentle wave shape.
(Note to the astute: The Plaesiomys subquadratus has
this description too, but has a more rectangular outline, among other unique
features.)
When you fossil hunt on these fossil-rich hillsides long enough, you don't
need technical details to tell these brachiopods apart. They begin to look so
different!!!
Above photo compliments of Cindy
This Hebertella has an interesting hole in it that may be a boring
from a predator, possibly a platycerid gastropod (snail with an attitude).
Next Page: Yet More Brachiopods
T A B L E O F C O N T E N T S
Page 1: Introduction and Collecting Photos
Fossils Found that Day
Page 2: Best Finds of the Day
Page 3: Crinoids, Pelecypod and Cephalopods
Page 4: Snails, Coral and Trace Fossils
Page 5: Brachiopods
Page 6: More Brachiopods
Page 7: Yet More Brachiopods