BHI Catalog:  Invertebrates


Invertebrates are simply explained as a group of animals without a vertebral column. This large group of animals currently represents over 90% of all animal species. Soft bodied invertebrates require such specialized conditions for fossilization that they are rarely found. The fossil record, however, paints a much clearer picture of the hard bodied invertebrates. These animals have what is called an exoskeleton, an outer covering produced with compound of biological materials and minerals (calcite, aragonite & chitin), which supports and protects the animal throughout its lifetime. Animals with exoskeletons include mollusks (snails, clams, brachiopods, ammonites, nautilus), echinoderms (starfish, crinoids and echinoids) and arthropods (insects, spiders, crustaceans, trilobites). Animals with this ‘external skeleton’ first appeared in the fossil record about 550 MYA, the development of which is believed to have been a driving role in the ‘Cambrian Explosion’.

Show All Items in Subcategories
Mollusks are a diverse group of animals including varieties from deep sea worm-like creatures, to clams and snails, to the colorful and strange cephalopods.
On-line Catalog
Catalog Home

-Dinosaurs & Birds
-Reptiles & Amphibians
-Plants & Amber
-Media & Displays
-Fossil Work Supplies
-Fossil Art & Collectibles
-Books, Videos, Posters & Charts
-Gifts & Apparel

Catalog Index
Original Specimens
Catalog & BHI PDFs

Search Catalog

Programs & Services
Lease Program

Your Cart
Cart is Empty

View Cart

Account Login


Log in
Recover password

Contact Us
Privacy Statement
Terms & Conditions

Map ~ Help ~ Links