SINCLAIR STAMMERS / Well preserved fossil of trilobite Dudley locust (Calymene blumenbachii) from the Silurian period, found in the Wenlock Limestone of Wrens Nest Hill, Dudley, Worcestershire.

Paul D Stewart / Illustration of trilobuite (Paradoxides bohemicus), Plate 1. From 'Organization of the Trilobites' by Hermann Burmeister, appearing in the Ray Society translation of his work published in 1846. The Il...

SINCLAIR STAMMERS / Fossil of a Trilobite (Olenellus / Olenellus gilberti Meek) from the Lower Cambrian period, Chisolm shale, Pioche formation, Half Moon mine, Pioche, Nevada, USA. Pete Lawrance collection

SINCLAIR STAMMERS / Underside or ventral surface of a trilobite (Acaste downingae) showing the biramous limb attachment points, from Silurian period, Wenlock limestone, Dudley.

SINCLAIR STAMMERS / Well preserved fossil of trilobite Dudley locust (Calymene blumenbachii) from the Silurian period, found in the Wenlock Limestone of Wrens Nest Hill, Dudley.

SINCLAIR STAMMERS / Trilobite (Flexicalymene meeki) rolled showing defensive behaviour, from the Ordovician period, found in the Richmond Formation, USA

SINCLAIR STAMMERS / Well preserved fossil of trilobite Dudley locust (Calymene blumenbachii) from silurian period, found in the Wenlock Limestone of Wrens Nest Hill, Dudley.

SINCLAIR STAMMERS / Well preserved fossil of trilobite, Dudley locust (Calymene blumenbachii) rolled in defensive position, from Silurian period, found in the Wenlock Limestone of Wrens Nest Hill, Dudley.

SINCLAIR STAMMERS / Well preserved fossil of trilobite, Dudley locust (Calymene blumenbachii) rolled in defensive position, from Silurian period, found in the Wenlock Limestone of Wrens Nest Hill, Dudley.

SINCLAIR STAMMERS / Well preserved fossil of trilobite Dudley locust (Calymene blumenbachii) from the Silurian period, found in the Wenlock Limestone of Wrens Nest Hill, Dudley.

Juan Carlos Munoz / Fossil of a Trilobite (Ceratarges sp) from the Devonian period, Asturias, Spain

SINCLAIR STAMMERS / Fossil of Trilobite (Andegavia cf. simplex) from the Devonian period, Eifelian, Hamar Laghdad, Morocco. Pete Lawrance collection

SINCLAIR STAMMERS / Close up of fossil of the schizochroal eye of the Trilobite (Plesiomavinella pujrarii) (Wolfart 1968) from the Devonian period, Givetian, Sleasica Formation, Tikani, La Paz, Bolivia. Pete Lawrance col...

SINCLAIR STAMMERS / Fossils of Burrowing trilobites (Homalonotus / Trimerus linares) (Salter) from the Middle Devonian period, Patacamaya, Bolivia. The cylindrical body shape plus shovel nose headshield possibly indicate...

SINCLAIR STAMMERS / Fossil of a Trilobite (Olenellus / Olenellus gilberti Meek) from the Lower Cambrian period, Chisolm shale, Pioche formation, Half Moon mine, Pioche, Nevada, USA. Pete Lawrance collection

SINCLAIR STAMMERS / Fossils of Middle Cambrian Trilobites (Ellipsocephalus hoffi) (Schlotheim 1823) from the Jince formation, Mount Konicek, Czech Republic, individuals are about 15mm in length. Pete Lawrance collection.

SINCLAIR STAMMERS / Fossil of a trilobite (Paradoxides gracilis Boeck 1827) from the Middle Cambrian period, Jince Formation, P. gracilis zone, Vinice, Jince, Vystrkov, Czech Republic. Pete Lawrance collection.

SINCLAIR STAMMERS / Fossil of a Trilobite (Clymenella / Eohomalonotus sp) from the Ordovician period, Uppermost Llanvirn Series, Rehamna, Morocco. The expanded axial segments and shovel nose snout indicate a burrowing mo...

SINCLAIR STAMMERS / Fossils of Elrathia kingi trilobite, from the Wheeler Shale, Utah, USA (size:17-32mm)

SINCLAIR STAMMERS / Fossils of Elrathia kingi trilobite, from the Wheeler Shale, Utah, USA (size: 17-32mm)

SINCLAIR STAMMERS / Fossil of Flexicalymene meeki trilobite rolled up, Ordovician period, from the Richmond formation strata of Mount Orab, Ohio, USA

SINCLAIR STAMMERS / Mid Cambrian Trilobite (Altiocculus harrisi) Upper Wheeler Shale, Harris quarry, Wheeler Ampitheater, House Range, Utah, USA

Graham Eaton / Fossil Trilobite (Dalmanites myops) from Silurian period, Builth Wells, Wales, UK

John Cancalosi / Fossil Trilobite (Redlichia takooensis), Lower (Early) Cambrian Period, Emu Bay Shale formation, Kangaroo Island, South Australia

John Cancalosi / Trilobite fossils, (Cerurus ocekaspis) left and (Sumphururus ytripocis) right, Ordovician age, Zagoura, Morocco

John Cancalosi / Trilobite (Sumphururus ytripocis) fossils, Ordovician age, Zagoura, Morocco

John Cancalosi / Fossil Trilobite (Redlichia takooensis), Lower (Early) Cambrian Period, Emu Bay Shale formation, Kangaroo Island, South Australia

John Cancalosi / Trilobite fossils (Acadoparadoxides) from the Cambrian Period (520 million years ago), Djebel Ougnat, Morocco

John Cancalosi / Trilobite fossils from middle cambrian period {Bolaspidella housensis} USA

John Cancalosi / Trilobite fossils {Xenasaphus devexus} mid- devonian Russia

Paul D Stewart / Fossil Trilobite (Triarthus eatoni) showing rare pyrites preservation of the limbs and antennae. From the late Ordovician 'Beecher's Bed' of Oneida County, New York, USA. The site is named after Charl...

Paul D Stewart / Illustration of Trilobite (Phacops latifrons) enrolled and open, from 'Organization of the Trilobites' by Hermann Burmeister, appearing in the Ray Society translation of his work published in 1846. Th...

Paul D Stewart / Trilobite (Asaphus platycephalus) from 'Organization of the Trilobites' by Hermann Burmeister, appearing in the Ray Society translation of his work published in 1846. The Illustrations and engravings...

Paul D Stewart / Illustration of Trilobite (Homalonotus armatus) from 'Organization of the Trilobites' by Hermann Burmeister, appearing in the Ray Society translation of his work published in 1846. The illustrations a...