Rare Jimbacrinus Crinoid Fossils Found In Gascoyne Junction Western Australia

With over 18 individuals, this is a remarkable mass mortality plate of Jimbacrinus crinoid fossils from Western Australia, which is extremely unusual.

These crinoids are three-dimensional and have an extremely strange look.

The plate measures 12.6 x 10 inches and has been meticulously prepared.

Skin-colored dusky rare Jimbacrinus Crinoid Fossils on a skin soil plate

Skin-colored dusky rare Jimbacrinus Crinoid Fossils on a skin soil plate

What Are Crinoids?

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Crinoids, which are sometimes referred to as sea lilies, are animals, not plants, and are found in the ocean.

They are echinoderms, which means they are related to starfish, sea urchins, and brittle stars, among other things.

Many crinoid characteristics are shared by other members of its phylum; for example, tube feet, radial symmetry, a water circulatory system, and appendages in multiples of five are all shared by crinoids (pentameral).

It was during the Ordovician period (488 million years ago) that they first appeared, and some species are still alive today.

As a result of Australia’s rigorous fossil export regulations, these Jimbacrinus crinoids are difficult to come by.

This specimen was lawfully exported during the 1980s and had been in a collection for many years until it was recently re-prepared for display.

What Do Crinoid Fossils Look Like?

2.45" Fossil Crinoid (Jimbacrinus) - Gascoyne Junction, Australia (#188633)  For Sale - FossilEra.com

Crinoids are essentially upside-down starfish with stems, which is a fairly simple description. Crinoid stems stretch downward from what would normally be the top of a starfish, leaving the mouth of the creature open skyward and its arms splayed out in front of the organism’s mouth opening. The crinoid arms, on the other hand, appear articulated and feathery.

Some people even took these fossils as a movie scene and say:

“I was going to say they look like the squid robots from The Matrix movies”

“Rewatched the matrix only a couple days ago, and yep! these look like them!”

A Giant 4.2″ Jimbacrinus Crinoid Found In Australia

This Jimbacrinus bostocki fossil from Western Australia is extremely 3D and realistic in appearance. This crinoid, which has an extraterrestrial appearance, is in excellent shape, is 4.2″ in length, and is shown in an aesthetically pleasing carved block of stand stone. It dates back to roughly 280 million years ago, during the Early Permian period.

As a result of Australia’s stringent fossil export regulations, these Jimbacrinus crinoid fossils are extremely difficult to come by, and this specimen is one of just a few that have been lawfully shipped with the required permissions.

A closed view of a Jimbacrinus Crinoid Fossil found in Australia

A closed view of a Jimbacrinus Crinoid Fossil found in Australia

Are Crinoid Fossils Common?

Crinoids are frequent fossils in the Silurian rocks of Shropshire, the early Carboniferous rocks of Derbyshire and Yorkshire, and the Jurassic rocks of the Dorset and Yorkshire coastlines. They are also found in the Silurian rocks of the United Kingdom.

Giant Piece Of Early Permian Cundlego Crinoid Siltstone

Although it is located far from the open ocean, the Cundlego Formation is over 275 million years old and came into being as a result of flooding in an internal rift basin.

It is thought that Pangea was formed by joining together the two supercontinents Laurasia in the north and Gondwana in the south to form a single, massive continent known as Pangea.

It had a rather rich marine species that prospered in the chilly but warming seas.

Periodic storm occurrences buried the more immobile, bottom-dwelling species under a thick layer of sand and silt, preventing them from moving.

Rock surfaces exposed by storms in the Cundlego Formation at Gascoyne Junction were strewn with assemblages of sea stars, brittle stars, and filter-feeding crinoids (sea lilies), all of which died.

A big slab of the Cundlego Formation, which was presented to the Western Australian Museum, contains several articulated crinoids as well as an unidentified species of sea star, among other things.