GB3D Type Fossils

 Home   The project   Search  About fossils Contributors Downloads Links Contact us

Fossil specimen : SM A 11606 – Holotype

Taxonomic Group

Kingdom Animalia

  Phylum Arthropoda

    Class Trilobita

      Order Phacopida

Fossil Name Pseudosphaerexochus octolobatus (McCoy), 1849
Type Status Holotype
Name History

Pseudosphaerexochus octolobatus (McCoy), 1849

Pseudosphaerexochus octolobatus (McCoy), 1849: Holotype

Cheirurus (Actinopeltis) octolobatus (McCoy)

Cheirurus octolobatus (McCoy)

Ceraurus actolobatus McCoy: Holotype

Ceraurus octo-lobatus McCoy

Registration No. A 11606
Collector Name not available
Donor or Associated Person Name not available
Held By Sedgwick Museum of Earth Sciences Logo Sedgwick Museum of Earth Sciences, University of Cambridge
Country Wales
Locality Rhiwlas, Bala Lake, Merionethshire, Wales
Grid Reference Not available
Rock Unit Limestone
Biozone Not available
Geological Age

Ashgill Series (Ordovician Period) – Caradoc Series (Ordovician Period) (443.8 – 458.4 Ma B.P.)

[Closest ICS interval: Late Ordovician Epoch ]


Dean 1962 a. Bulletin of the British Museum (Natural History). Geology vol. 7 (5): p.88

McCoy 1849 b. Annals and Magazine of Natural History ser. 2 vol. iv (1): p.407

McCoy 1851 a. A synopsis of the classification of the British Palaeozoic rocks with a systematic description of the British Palaeozoic fossils (2): p.154 pl. ig figs.10, 10 a

McCoy 1854 a. Contributions to British Palaeontology (1): p.146

Salter 1873. Catalogue of the Cambrian and Silurian fossils contained in the Geological Museum of the University of Cambridge (3): p.51

Whittington, H.B. 1965 for 1964. A monograph of the Ordovician Trilobites of the Bala area, Merioneth Palaeontographical Society Monographs (6): p.37 pl. x fig.17

Woods, H. 1891. Catalogue of the Type Fossils in the Woodwardian Museum, Cambridge. Henry Woods with preface by T. McKenny Hughes CUP. 180+xiv SPL: II. 16 (4): p.142

Available Images

High resolution photographs


6451 KB


5620 KB

Steroscopic photographs


5036 KB

View these images in your web browser using our JPEG2000 viewer. Zoom in and out and pan around in high resolution. Requires JavaScript to be enabled.

Download these images as high resolution JPEG2000 files. You may need to use image-editing software to view these files.

click image or here to close