Quadratirhynchia crassimedia depressa Ager, 1956

* Holoteip: 26.135.G292

* Ardal: Doghouse Cliff, Seatown, Dorset

* Uned Craig: Haen R, Ffurfiant calchfaen ban

* Oes Ddaearegol: Oes Pliensbachian (Cyfnod Jwrasig) (183 – 189.6 Ma B.P.)

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