Sawyer, R.T. 2019.

Observations on the terrestrial leech Haemopis septagon Sawyer & Shelley, 1976 (Annelida: Hirudinea) from the Outer Banks, North Carolina, USA, with a revision of the species

. Zootaxa. 4658, 2 (Aug. 2019), 275–296. DOI:https://doi.org/10.11646/zootaxa.4658.2.4.