Invertebrate Fossils

Invertebrates – animals without a backbone – range from things like spiders and beetles to octopuses, worms and trilobites! This section showcases our invertebrates for sale, with a focus on trilobites. Trilobites are marine arthropods that date back to the Cambrian, more than five hundred million years ago! They were similarly to modern-day crabs or lobsters, and were the dominant marine life form for hundreds of millions of years, with some 20,000 described species. Trilobites went extinct during the Permian Mass Extinction, which ushered in the age of the dinosaurs.


Please contact me if you have any questions – I love to talk about fossils! – or would like to see additional specimens. Currently I have several Asaphus kowalewskii and indet. Asaphidae in preparation, and plenty of partials!

Flexicalymene nodule from Ordovician Morocco


Found near the outskirts of Alnif, Morocco, these nodules hold iconic Calymenid trilobites. Unlike many commercially available specimens, our nodules are complete and not composited, which makes for an impressive display of a unique preservation. These trilobites measure between 2″ and 4″ long, though we will try to accommodate specific sizing requests.

Kainops invius cephalons from Clarita, Oklahoma

$5 per specimen

These excellently preserved trilobite heads come from Leon Theisen’s quarry in southern Oklahoma, and have been expertly prepared and coated for preservation. Kainops invius is a classic American trilobite, and this is an affordable way to own a beautiful caramel-colored specimen against the white matrix. Specimens average 1″, and matrix sizes vary from 1″ to 3″.

Moroccan Odontochile in Unique Position


This Odontochile is partially enrolled and displays beautifully with outstretched genal spines. The specimen does have some restoration and the preparation falters in places, but this is an affordable example of an excellent and desirable trilobite! The eyes on this specimen are good, with some damage to the left eye. If outstretched, the specimen would measure approximately 2.5″. If you would like additional pictures please let us know.

Affordable Reedops trilobite from Devonian Morocco


This large Reedops trilobite is partially enrolled and displays fantastically! It is an imperfect specimen, with damage mainly focused on the cephalon, but it more than makes up for it in size measuring nearly 4″ if outstretched. This is a great piece for a growing collection, or to add variety to a vertebrate shelf. If you would like more pictures please let us know.

Eldredgeops rana Prone Trilobite 


A classic American trilobite, Eldredgeops rana is a Phacopid trilobite from Devonian New York. This 1″ specimen is an absolutely stunning example with great preparation and good preservation, but the size of the matrix makes this piece. The trilobite sits on the precipice of the tall, rectangular matrix that displays excellently, and is free of problems except for slight preservation damage on the left cephalon. Nonetheless, this is a great example of a must-have trilobite!

Study-grade Moroccan Trilobites

$3 per specimen

These Phacopid trilobites are enrolled specimens that measure between 1″ and 2″, and exhibit the anatomy of trilobites excellently. Because they are surface finds, all of the pieces will have erosion damage; they still display well, but are excellent teaching tools, introductory specimens, and comparative pieces. If you have requests for particularly well-preserved features, such as the eyes or pygidium, please let us know and we will pick out specific specimens for you!


Cleoniceras Split Pair from Cretaceous Madagascar

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This fine, large Cleoniceras has been sliced in two and polish to expose crystalline structures and the well-defined septa, or chambers, of this 110-million-year old fossil. Ammonites determined their depth by filling their septa with gas to float or sink as needed. This specimen measures a whopping 6.75″ inches and has an excellent iridescent nacre on the converse, and is perfect for eye-catching display.


Polished Orthocone Nautiloid (Orthoceras



These fossilized squid shells display beautifully because of their stark white-and-black permineralization, and come from central Morocco. These fossils are not actually in the commercially popular genus Orthoceras, but more likely Orthocycloceras, and lie on the Devonian-Silurian boundary. These specimens measure between 4″ and 7″, with the majority around 5″, and are great for education, display, or as gifts for the budding collector!

Orthocone Nautiloid and Goniatite Composition



These plates contain one nautiloid and one goniatite, a relative of the ammonite and nautilus, from Devonian Morocco. The pair of fossils were composited on the rich brown matrix, which means they are not a natural association, but they are still a great display piece at an affordable price. These fossils measure between 6 and 8″, though we will try to accommodate sizing requests.


Pinnixa galliheri crab



This pea crab fossil from Monterey, California shows beautiful yellow and red colors due to iron oxide, with excellent preservation overall. This crab measures .75″ on a 2″ matrix, and is about eight million years old! This is an excellent, unusual arthropod to add to any collection at an affordable price.

Carpopenaeus callirostris shrimp 



This beautiful Cretaceous shrimp is from Lebanon, and is well centered on the matrix. Like many specimens from this location, the antennae have been stained for display purposes, although this was done conscientious of the species’ morphology. This specimen measures more than three inches from tip to tail, and possesses a partial juvenile shrimp on the back of the matrix. This shrimp makes a great beachy display for home decor, and is a fine addition to any fossil collection.

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