''Estaingia bilobata'' is a species of

trilobite Trilobites (; meaning "three-lobed entities") are extinction, extinct marine arthropods that form the class (biology), class Trilobita. One of the earliest groups of arthropods to appear in the fossil record, trilobites were among the most succ ...

from the lower

Cambrian The Cambrian ( ) is the first geological period of the Paleozoic Era, and the Phanerozoic Eon. The Cambrian lasted 51.95 million years from the end of the preceding Ediacaran period 538.8 Ma (million years ago) to the beginning of the Ordov ...

period. Their fossils are found chiefly in Australia.

References

* * * * * Estaingiidae Cambrian trilobites of Australia Emu Bay Shale Cambrian genus extinctions Fossil taxa described in 1964 {{Ptychopariida-stub