The Spence Shale is the middle member of the Langston Formation in southeastern Idaho and northeastern Utah. It is exposed in the Bear River Range, the Wasatch Range and the Wellsville Mountains. It is known for its abundant Cambrian trilobites and the preservation of Burgess Shale-type fossils.Kimmig, J., Strotz, L.C., Kimmig, S.R., Egenhoff, S.O., Lieberman, B.S. 2019. The Spence Shale Lagerstätte: an important window into Cambrian biodiversity. Journal of the Geological Society of London, 176, 609–619.

The type locality is Spence Gulch in southeastern Idaho, near the town of Liberty. It was first described by Charles Doolittle Walcott in 1908.Walcott, C.D. 1908. Cambrian Geology and Palaeontology. Smithsonian Museum, Miscellaneous Collections, 53.

Stratigraphy

The Spence Shale spans the Albertella and Glossopleura biozones.Kimmig, J., Strotz, L.C., Kimmig, S.R., Egenhoff, S.O., Lieberman, B.S. 2019. The Spence Shale Lagerstätte: an important window into Cambrian biodiversity. Journal of the Geological Society of London, 176, 609–619.

Fauna

Generic list of the fauna of the Spence Shale:Kimmig, J., Strotz, L.C., Kimmig, S.R., Egenhoff, S.O., Lieberman, B.S. 2019. The Spence Shale Lagerstätte: an important window into Cambrian biodiversity. Journal of the Geological Society of London, 176, 609–619.Wen, R., Babcock, L.E., Peng, J., Robison, R.A. 2019. New edrioasteroid (Echinodermata) from the Spence Shale (Cambrian), Idaho, USA: further evidence of attachment in the early evolutionary history of edrioasteroids. Bulletin of Geosciences, 94, 115–124.Hammersburg, S.R., Hasiotis, S.T., Robison, R.R. 2018. Ichnotaxonomy of the Cambrian Spence Shale Member of the Langston Formation, Wellsville Mountains, Northern Utah, USA. Paleontological Contributions, 20, 1–66.

Arthropoda

Soft-bodied Anomalocaris Canadaspis Caryosyntrips Dioxycaris Hurdia Isoxys Leanchoilia Meristosoma Mollisonia Sidneyia Tuzoia Utahcaris Waptia Yohoia

Agnostida Pentagnostus Ptychagnostus

Trilobita Alokistocare Alokistocarella Amecephalus Athabaskia Bathyuriscus Bythicheilus Chancia Ehmaniella Glossopleura Kochina Kootenia Ogygopsis Olenoides Oryctocara Oryctocephalites Oryctocephalus Pagetia Piochaspis Polypleuraspis Ptychoparella Solenopleura Syspacephalus Thoracocare Utia Zacanthoides

Brachiopoda Acrothele Dictyonina Diraphora Lingulella Micromitra? Wimanella

Mollusca Latouchella Scenella Wiwaxia

Lophotrochozoa Haplophrentis Hyolithellus Hyolithes

Echinodermata Ctenocystis Gogia Lyracystis Ponticulocarpus Totiglobus

Hemichordata Margaretia Sphenoecium

Priapulida Ottoia Selkirkia Wronascolex?

Lobopodia Acinocricus Hallucigenia

Porifera Brooksella? Protospongia Vauxia

Problematica Banffia Eldonia Siphusauctum Tentalus

Algae Marpolia

Cyanobacteria Morania

Trace Fossils Archaeonassa Arenicolites  Aulichnites Bergaueria Chloephycus Conichnus Coprolite Cruziana Dimorphichnus  Diplichnites Gordia Gyrophyllites Halopoa Lockeia Monomorphichnus Nereites Phycodes Phycosiphon Planolites Protovirgularia Rusophycus Sagittichnus Scolicia Taenidium Teichichnus Tomaculum Treptichnus Trichophycus

See also

List of fossiliferous stratigraphic units in Idaho List of fossiliferous stratigraphic units in Utah Paleontology in Idaho Paleontology in Utah

References