Fossil specimen : SM A 16747 – Lectotype
| Taxonomic Group |
Kingdom Animalia Phylum Arthropoda Class Trilobita Order Asaphida |
|---|---|
| Fossil Name | Dionide atra Salter |
| Type Status | Lectotype |
| Name History | Dionide atra Salter: Lectotype Dionide atra Salter Dionide atra Salter Dionide atra Salter: Syntype |
| Registration No. | A 16747 |
|---|---|
| Collector | Name not available |
| Donor or Associated Person | Name not available |
| Held By |
 Sedgwick Museum of Earth Sciences, University of Cambridge
|
| Comments |
| Country | Wales |
|---|---|
| Locality | Ty Obry, Portmadoc, Garth, Caernarvonshire, Wales |
| Grid Reference | Not available |
| Rock Unit | Ty-Obry Bed |
|---|---|
| Biozone | Not available |
| Geological Age |
Llandeilian Stage (Ordovician Period) (458.4 – 460.5 Ma B.P.) [Closest ICS interval: Darriwilian Age ] |
| References | Reed, F.R.C. 1912. Geological Magazine n.s. dec. v, vol. ix (3): p.200 pl. xi fig.1 Salter 1866 b. The geology of North Wales Memoirs of the Geological Survey of England and Wales vol. iii (1st edition) (1): p.321 pl.11 a fig.9? Salter 1873. Catalogue of the Cambrian and Silurian fossils contained in the Geological Museum of the University of Cambridge (2): p.22 Whittington, H.B. 1952. Journal of Paleontology vol. xxvi (4): p.7 pl. ii fig.9 |
|---|
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