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Bristolia bristolensis

amnhnyc: “ Welcome back to Trilobite Tuesday! Something that continually perplexes both scientists and trilobite enthusiasts is a rather basic question: where did trilobites come from?

Syspacephalus longus = Ptychoparella longus (see Jell & Adrain, 2003) Palmer in Palmer & Halley, 1979] Order Ptychopariida, Superfamily Ptychparioidea, Family Ptychopariidae Locality: Lincoln County, Nevada Stratigraphy: Pyramid Shale Member of the Carrara Formation, Lower Middle Cambrian

Ptychoparella longus Trilobite Fossil from Nevada Carrara Formation

Kettneraspis williamsi Oklahoma Trilobite  Trilobite Order Lichida, Family Odontopleuridae  Geological Time: Lower Devonian  Size: Trilobite is 25 mm long by 25 mm wide on a 70 mm by 50 mm by 47 mm tall matrix  Fossil Site: Haragan Formation, Coal County, Clarita, Oklahoma

I should really get around to making a display case for my kettneraspis.

Quadrops flexuosa  Richer and Richer 1952 (Quadrops) Order Phacopina (Salter 1864),  Suborder Phacopina, Superfamily Acastoidea Family Acastidae Genus Quadrops Morzadec 2011 El Otfal Formation Emsium, Middle Devonian Jebel Oufatene, Alnif regions (Erfoud) Morocco

Quadrops flexuosa Richer and Richer 1952 (Quadrops) Order Phacopina (Salter Suborder Phacopina, Superfamily Acastoidea Family Acastidae Genus Quadrops Morzadec 2011 El Otfal Formation Emsium, Middle Devonian Jebel Oufatene, Alnif regions (Erfoud) Morocco

Crotalocephalina gibba

A Gallery of some of the Trilobite Order Phacopida

Gabriellus kierorum

Cambrian Trilobites of Canada (alphabetized)

Pterocephalia norfordi trilobite from the Upper Cambrian of British Columbia, Canada.....

Pterocephalia norfordi trilobite from the Upper Cambrian of British Columbia, Canada.

Uralichas species  12032C.jpg (800×881)

Uralichas species 12032C.jpg (800×881)

American Museum of Natural History  Asaphus kowalewskii, a  trilobite!  Trilobites were a diverse group of arthropods that dominated the seas for almost 300 million years. Trilobite vision was highly advanced for its time: trilobites are the earliest known life forms with compound eyes—eyes with multiple lenses. Certain species, such as the above Asaphus kowalewskii, evolved highly specialized adaptations, such as long eye stalks, which may have allowed them to peer above sediments.

Celebrate Fossil Friday with Asaphus kowalewskii, a tremendous trilobite! Trilobites were a diverse group of arthropods that dominated the seas for almost 300 million years. Trilobite vision was.

Affichage de Acadoparadoxides briareus 3 WAS-Archives.org ARCHIVED.jpg

Affichage de Acadoparadoxides briareus 3 WAS-Archives.org ARCHIVED.jpg

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