However , the latter are more complex anatomically than e.g. flatworms , and the small microlecithal eggs do not allow full development .
In animals with high egg mortality , microlecithal eggs are the norm , as in bivalves and marine arthropods .
The latter are more complex anatomically than e.g. flatworms , and the small microlecithal eggs do not allow full development .
In animals with high egg mortality , microlecithal eggs are the norm , as in bivalves and marine arthropods .