are segmented parasitic or predatory worms that comprise the subclass Hirudinea within the phylum Annelida. They are closely related to the oligochaetes...

Hirudinea. The oligochaetes contain the tubificids (Naididae, Lumbricidae, and Lumbriculidae - commonly the tube worms and the earthworms. Hirudinea contains...

Turtle leeches are a genus, Ozobranchus, of leeches (Hirudinea) that feed exclusively on the blood of turtles. Only two species – Ozobranchus margoi and...

a new leech species from North America, Helobdella austinensis n. sp.(Hirudinea: Glossiphoniidae), with observations on its feeding behaviour. Zoosyst...

Shabnam & Saglam, Naim (2020). "The status of the leech fauna (Annelida, Hirudinea) at the Eastern Region of Azerbaijan". Journal of Wildlife and Biodiversity...

Oka, A. 1917. Zoological Results of a Tour in the Far East, pt. III. Hirudinea. Memoirs of the Asiatic Society of Bengal, VI, pp. 157-176, pl. VII. Sawyer...

handle temperatures as low as 4 to 6 °C (39.2– 42.8 °F). "A cave leech (Hirudinea, Erpobdellidae) from Croatia with unique morphological features". Croatian...

leech and the physician: biology, etymology, and medical practice with Hirudinea medicinalis". World Journal of Surgery. 24 (7): 878–883. doi:10.1007/s002680010141...

Invertebrate Systematics. 16: 1–6. doi:10.1071/IT01011. "Phylum Annelida: Class Hirudinea (Leeches)", Parasites of North American Freshwater Fishes, Ithaca, NY:...

natural history and behavior of Erpobdella punctata (Leidy) (Annelida: Hirudinea)". American Midland Naturalist. 83 (1): 65–80. doi:10.2307/2424006. JSTOR 2424006...