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Acritrachs from the type area of the Ordovician Caradoc Series, Shropshire, England.
| Turner, R.E. | |
| 1984 | |
| Palaeontographica, Abt.B, v.190, nos.4-6, p.87-157, pl.1-14. | |
| Acritrachs from the type area of the Ordovician Caradoc Series, Shropshire, England. |
Turner, R.E., 1984: Acritrachs from the type area of the Ordovician Caradoc Series, Shropshire, England; Palaeontographica, Abt.B, v.190, nos.4-6, p.87-157, pl.1-14.