Common. (Key, R. (2024) St Helena terrestrial & freshwater invertebrate species list 2024 v13.)
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Invasive. (St Helena Invertebrate Forum (2024) St Helena Species Spreadsheet v12.5. Dataset.);
Environmental threat. (St Helena Invertebrate Forum (2024) St Helena Species Spreadsheet v12.5. Dataset.);
Public health. (St Helena Invertebrate Forum (2024) St Helena Species Spreadsheet v12.5. Dataset.);
Pickard-Cambridge (1869) p. 543, also as americanus on the same page.
Key, R., Fowler, L., Pryce, D., Wilkins, V., Key, R. (2021). Terrestrial & Freshwater Invertebrates of St Helena. Pisces Publications, Newbury; St Helena Invertebrate Forum (2024) St Helena Species Spreadsheet v12.5. Dataset.;