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Negative (shadows make it look positive) Witryides rosmerta Order Proetida, Family Proetidae, Subfamily Ditmopyginae Carboniferous, Tounasian Stage (~350 million years ago) Size (25.4 mm = 1 inch): Trilobite is 25 mm long by 15 mm wide on a 120 mm by 50 mm by 55 mm high (part) and 100 mm by 45 mm by 50 mm high (counterpart) matrix Antoing, Belgium Description: This is an example of the rare Caboniferous proetid trilobite Witryides rosmerta.

Negative (shadows make it look positive) Witryides rosmerta Order Proetida, Family Proetidae, Subfamily Ditmopyginae Carboniferous, Tounasian Stage (~350 million years ago) Size (25.4 mm = 1 inch): Trilobite is 25 mm long by 15 mm wide on a 120 mm by 50 mm by 55 mm high (part) and 100 mm by 45 mm by 50 mm high (counterpart) matrix Antoing, Belgium Description: This is an example of the rare Caboniferous proetid trilobite Witryides rosmerta.

Proetus tuberculatus morocensis Moroccan Trilobite

Proetus tuberculatus morocensis Moroccan Trilobite

Walliserops trifurcatus Trilobites Order Phacopida, Family Acastidae Geological Time: Middle Devonian Size: Walliserops trilobite is 85 mm long (curve measure) by 30 mm wide (including spines) Fossil Site: Foum Ziguid, Morocco

Walliserops trifurcatus Trilobites Order Phacopida, Family Acastidae Geological Time: Middle Devonian Size: Walliserops trilobite is 85 mm long (curve measure) by 30 mm wide (including spines) Fossil Site: Foum Ziguid, Morocco

Very Rare Montana Trilobite Vanuxemella norita   Vanuxemella norita  (Walcott 1916)  Trilobites Order Corynexochida,, Family Zacanthoididae  Geological Time: Middle Cambrian  Size: Trilobite is 8 mm on a 7 x 7 cm plate  Fossil Site: Gordon Shale, Thompson Falls, Montana

Very Rare Montana Trilobite Vanuxemella norita Vanuxemella norita (Walcott 1916) Trilobites Order Corynexochida,, Family Zacanthoididae Geological Time: Middle Cambrian Size: Trilobite is 8 mm on a 7 x 7 cm plate Fossil Site: Gordon Shale, Thompson Falls, Montana

Russian Trilobite Hoplolichas plautini

Russian Trilobite Hoplolichas plautini

Boedaspis ensifer. Lower Ordovician (Lower Darrivilian Stage) Putilovo Quarry, St. Petersburg Region, Russia

Breathtaking Boedaspis Trilobite With Prep Sequence

Boedaspis ensifer. Lower Ordovician (Lower Darrivilian Stage) Putilovo Quarry, St. Petersburg Region, Russia

A unique rock formation in the Atlas Mountains of Morroco contains thousands of specimens of perfectly preserved trilobites.      After the rocks are collected highly skilled  artisans use dental drills to cut away the matrix leaving these astonishing fossils.

A unique rock formation in the Atlas Mountains of Morroco contains thousands of specimens of perfectly preserved trilobites. After the rocks are collected highly skilled artisans use dental drills to cut away the matrix leaving these astonishing fossils.

This is a rare Cenoceras nautilus from Belmont, France. It is 5 inches in diameter and is free-standing on a sculpted block of matrix.

5 Inch Polished Cenoceras Nautilus - France

This is a rare Cenoceras nautilus from Belmont, France. It is 5 inches in diameter and is free-standing on a sculpted block of matrix.

"Welcome home to one of the rarest trilobites in the world. Thanks to a gift by Robert Hazen, this fossil of a new Apianurus species is now a part of the Museum's collection. This beautiful fossil was discovered by paleontologist Jake Skabelund in 2011 at the Walcott-Rust Quarry in New York." --Deep Time at the Smithsonian Facebook Page:

"Welcome home to one of the rarest trilobites in the world. Thanks to a gift by Robert Hazen, this fossil of a new Apianurus species is now a part of the Museum's collection. This beautiful fossil was discovered by paleontologist Jake Skabelund in 2011 at the Walcott-Rust Quarry in New York." --Deep Time at the Smithsonian Facebook Page:

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