The evolutionary relationships between different genera of asteroid echinoderms (starfish) have been interpreted by study of the skeletal morphologies and homologies of 24 extant taxa. It appears that the initial diversification of the neoasteroids took place in the Triassic or earlier, whereas the wide fossil diversity of this essentially modern fauna only became apparent in the Jurassic when extensive marine sediments appeared in the stratigraphic record.
There are currently no reviews for this product. Be the first to review this product!
Your orders support book donation projects
We welcome the range and price of boxes available and have been delighted with the speedy service compared to other suppliers.
Search and browse over 110,000 wildlife and science products
Multi-currency. Secure worldwide shipping
Wildlife, science and conservation since 1985