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Fossil specimen : BGS Zv1468 – Paratype

Taxonomic Group

Kingdom Animalia

  Phylum Mollusca

    Class Bivalvia

      Order -

Fossil Name Myodakryotus deigryn Tunnicliff
Type Status Paratype
Name History

Myodakryotus deigryn Tunnicliff

Ambonychia sp

Modiolopsis oricularis?

Modiolopsis orbicularis J. de C. Sowerby

Registration No. Zv1468
Collector Old Survey
Donor or Associated Person Name not available
Held By British Geological Survey Logo British Geological Survey
Comments This specimen has 3 labels all fixed in the order 1-3 one on to the other stating:- 1. Cwm chwilfod NE of Bala Modilosis orbicular 2. Cwm chwilfod NE of Bala Modiolopsis orbicularis? 3. CARADOC Cwm chwilfod, NE of Bala. Ambonychia
Country Wales
Locality Cwm Chwilfod, Gwynedd
Grid Reference Available from host institution
Rock Unit Gelli-Grin Calcareous Ash Formation
Biozone Not available
Geological Age

Woolstonian Substage (Ordovician Period) – Longvillian Substage (Ordovician Period) (452.1 – 454 Ma B.P.)

[Closest ICS interval: Katian Age – Sandbian Age ]


Tunnicliff 1987 Pal Vol 30, Part 4 p.685 pl 77 fig 10

Available Images

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Steroscopic photographs


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