GB3D Type Fossils

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Fossil specimen : SM A 11873 - A 11874 – Paratype

Taxonomic Group

Kingdom Animalia

  Phylum Arthropoda

    Class Trilobita

      Order Phacopida

Fossil Name Cheirurus (Pseudosphaerexochus) subquadratus Reed
Type Status Paratype
Name History

Cheirurus (Pseudosphaerexochus) subquadratus Reed: Paratype

Sphaerexochus calvus McCoy

Registration No. A 11873 - A 11874
Collector Name not available
Donor or Associated Person Nicholson, Henry Alleyne (1844-1899)
Held By Sedgwick Museum of Earth Sciences Logo Sedgwick Museum of Earth Sciences, University of Cambridge
Country England
Locality Keisley, Westmorland, England
Grid Reference Not available
Rock Unit Keisley Limestone
Biozone Not available
Geological Age

Ashgill Series (Ordovician Period) (443.8 – 449 Ma B.P.)

[Closest ICS interval: Late Ordovician Epoch ]


Nicholson, H.A. & Marr, J.E. 1891. The Cross Fell Inlier (with appendices by Alfred Harker and A.H. Foord) Quarterly Journal of the Geological Society of London volume 47 pages 500-529 (1): p.507

Reed, F.R.C. 1896. Quarterly Journal of the Geological Society of London vol. lii (2): p.421

Available Images

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