Fossil specimen : SM A 53012 – Holotype
| Taxonomic Group |
Kingdom Animalia Phylum Arthropoda Class Trilobita Order Asaphida |
|---|---|
| Fossil Name | Marrolithus lirellatus MacGregor |
| Type Status | Holotype |
| Name History | Marrolithus lirellatus MacGregor: Holotype |
| Registration No. | A 53012 |
|---|---|
| Collector | Name not available |
| Donor or Associated Person | MacGregor, A.R. |
| Held By |
 Sedgwick Museum of Earth Sciences, University of Cambridge
|
| Comments |
| Country | Wales |
|---|---|
| Locality | Llwyn-Onn Farmhouse, Llanrhaiadr-ym-Mochnant, Montgomeryshire, Wales |
| Grid Reference | Not available |
| Rock Unit | Upper Llandeilo |
|---|---|
| Biozone | Not available |
| Geological Age |
Llandeilian Stage (Ordovician Period) (458.4 – 460.5 Ma B.P.) [Closest ICS interval: Darriwilian Age ] |
| References | MacGregor 1963. Palaeontology vol. v (1): p.802, pl.116, fig. 18 (a.53, 012b) |
|---|
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