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.
Spiny Rare Chlustinia keyserlingi Odontopleurid Trilobite from Morocco
Arctinurus boltoni Trilobite Emperor of North American trilobites Arctinurus boltoni Trilobites Order Lichida, Family Lichidae Geological Time: Silurian Size: Trilobite is 122 mm long Fossil Site: Rochester Shale Formation, Middleport, New York
Rare Cyphaspides Trilobite Trilobites Order Proetida Superfamily Aulacopleuroidea Family Aulacopleuridae Geologic Age: Middle Devonian Trilobite is 55 mm long Hamar Jorf, Morocco Comments: Affinity with Cyphaspis with respect to bulbous cranidium, stalked eyes, and granulose. With fringing spines and genals, trilobite took 50 hours of preparation.
Trilobite Protolenus densigranulatus, Middle Cambrian, Jbel Wawrmast Formation (Tissafinian Stage), Morocco. Quality trilobites from the Cambrian of Morocco are far less common than their Devonian counterparts. Only in the last few years have these trilobites become generally available. Ones of this quality preservation are quite uncommon.
Fossil Invertebrates Diversity | The Field Museum - Phacopida Trilobite
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
Name: Oryctocephalites palmeri Sundberg & McCollum, 1997 Locality: Lincoln Co., Nevada Stratigraphy: Combined Metals Member, Pioche Shale Fm., Cambrian Remarks: photographed and found by Richie Kurkewicz The specimen figured here was Sam Gon's April 2004 "Trilobite of the Month" http://www.aloha.net/~smgon/new.htm