Dean R. Lomax; Judy A. Massare (2016). "Two new species of Ichthyosaurus from the lowermost Jurassic (Hettangian) of Somerset, England". Papers in Palaeontology. 3: 1–20. doi:10.1002/spp2.1065. S2CID89567182.
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Dean R. Lomax; Judy A. Massare (2016). "Two new species of Ichthyosaurus from the lowermost Jurassic (Hettangian) of Somerset, England". Papers in Palaeontology. 3: 1–20. doi:10.1002/spp2.1065. S2CID89567182.