Type locality: “Greenwich marshes”.
- Fleming, J. 1828. A history of British animals, exhibiting the descriptive characters and systematical arrangement of the genera and species of quadrupeds, birds, reptiles, fishes, Mollusca, and Radiata of the United Kingdom; including the indigenous, extirpated, and extinct kinds, together with periodical and occasional visitants. Bell & Bradfute: Edinburgh/James Duncan: London. xxiii + 565 pp. BHL Reference page.