References

  • Choffat, P. 1885. Description de la faune Jurassique du Portugal. Mollusques Lamelllibranches deuxieme ordre Asiphonidae. Memoir Section des Travaux Géologiques du Portugal. 36pp.
  • Sharpe, D. 1849. On the secondary district of Portugal which lies on the north of the Tagus. Quarterly Journal of the Geological society of London. 6, 135-201.