GB3D Type Fossils

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Fossil specimen : BGS GSM12396 – Lectotype

Taxonomic Group

Kingdom Animalia

  Phylum Mollusca

    Class Bivalvia

      Order -

Fossil Name Cyrtodontula billingsiana Salter
Type Status Lectotype
Name History

Cyrtodontula billingsiana Salter

Registration No. GSM12396
Collector Old Survey/Museum
Donor or Associated Person Name not available
Held By British Geological Survey Logo British Geological Survey
Comments Cited as alaeara billingsiana
Country Wales
Locality Nant Iorwerth,Ceiriog
Grid Reference Not available
Rock Unit Caradoc Rocks (Undifferentiated)
Biozone Not available
Geological Age

Caradoc Series (Ordovician Period) (449 – 458.4 Ma B.P.)

[Closest ICS interval: Late Ordovician Epoch ]


1866. Mem. Geol. Surv p.342 12 fig 4

Hind. 1910. Trans R. Soc. Edinburgh p.512

Available Images

High resolution photographs


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Steroscopic photographs


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