All Stories

  1. 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

    Article • Zootaxa, August 2019, Magnolia Press

    Roy Sawyer

  2. History of the Leech Trade in Ireland, 1750–1915: Microcosm of a Global Commodity

    Article • Medical History, May 2013, Cambridge University Press

    Roy Sawyer

  3. Re-assessment of the Medicinal LeechHirudo medicinalisLinnaeus, 1758, in Ireland

    Article • Zoosystema, March 2013, Museum National d'Histoire Naturelle, Paris, France

    Roy Sawyer

  4. Johann Friedrich Dieffenbach: successful use of leeches in plastic surgery in the 1820s

    Article • British Journal of Plastic Surgery, April 2000, Elsevier

    Roy Sawyer

  5. The trade in medicinal leeches in the southern Indian Ocean in the nineteenth century

    Article • Medical History, April 1999, Cambridge University Press

    Roy Sawyer

  6. Tridegin, a new peptidic inhibitor of factor XIIIa, from the blood-sucking leechHaementeria ghilianii

    Article • Biochemical Journal, June 1997, Portland Press Ltd.

    Roy Sawyer

  7. Tridegin, a new factor XIIIa inhibitor from the Giant Amazon Leech, Haementeria ghilianii

    Article • Blood Coagulation & Fibrinolysis, October 1996, Wolters Kluwer Health

    Roy Sawyer

  8. P2 The potency of Tridegin, the new leech-derived factor XIIIa inhibitor, as a transglutaminase inhibitor

    Article • Blood Coagulation & Fibrinolysis, October 1996, Wolters Kluwer Health

    Roy Sawyer

  9. P3 Inhibition of fibrin cross-linking with Tridegin results in clots that lyse more rapidly

    Article • Blood Coagulation & Fibrinolysis, October 1996, Wolters Kluwer Health

    Roy Sawyer

  10. Clitellate cocoons in freshwater deposits since the Triassic

    Article • Zoologica Scripta, October 1991, Wiley

    Roy Sawyer

  11. Thrombolytics and Anticoagulants from Leeches

    Article • Biotechnology, June 1991, Nature

    Roy Sawyer

  12. Editorial

    Article • Blood Coagulation & Fibrinolysis, February 1991, Wolters Kluwer Health

    Roy Sawyer

  13. Functional arginine residues in leech hyaluronidase (Orgelase)

    Article • Biochemical Society Transactions, August 1989, Portland Press Ltd.

    Roy Sawyer

  14. The Lives and Loves of LeechesLeech Biology and Behaviour. Volume 1: Anatomy, Physiology, and Behaviour. Roy T. SawyerLeech Biology and Behaviour. Volume 2: Feeding Biology, Ecology, and Systematics. Roy T. SawyerLeech Biology and Behaviour. Volume 3: ...

    Article • The Quarterly Review of Biology, June 1988, University of Chicago Press

    Roy Sawyer

  15. Leech Biology and Behaviour

    Article • Journal of Animal Ecology, June 1987, JSTOR

    Roy Sawyer

  16. Arthropodization in the Hirudinea: evidence for a phylogenetic link with insects and other Uniramia?

    Article • Zoological Journal of the Linnean Society, February 1984, Oxford University Press (OUP)

    Roy Sawyer

  17. Why We Need to Save the Medicinal Leech

    Article • Oryx, October 1981, Cambridge University Press

    Roy Sawyer

  18. GROWTH AND REPRODUCTION OF THE GIANT GLOSSIPHONIID LEECHHAEMENTERIA GHILIANII

    Article • Biological Bulletin, April 1981, University of Chicago Press

    Roy Sawyer

  19. Embryonic cell lineages in the nervous system of the Glossiphoniid leech Helobdella triserialis

    Article • Developmental Biology, April 1980, Elsevier

    Roy Sawyer

  20. New records and species of leeches (Annelida: Hirudinea) from North and South Carolina

    Article • Journal of Natural History, February 1976, Taylor & Francis

    Roy Sawyer

  21. THE BIOLOGY OF THE LEECH MYZOBDELLA LUGUBRIS INFESTING BLUE CRABS AND CATFISH

    Article • Biological Bulletin, April 1975, University of Chicago Press

    Roy Sawyer

  22. Placobdella multilineata (Hirudinea) from the American Alligator in Florida

    Article • Journal of Parasitology, August 1974, JSTOR

    Roy Sawyer

  23. Observations on the physiology and phylogeny of colour change in marine and freshwater leeches (Annelida: Hirudinea)

    Article • Hydrobiologia, March 1974, Springer Science + Business Media

    Roy Sawyer

  24. OBSERVATIONS ON THE MARINE LEECHCALLIOBDELLA CAROLINENSIS(HIRUDINEA: PISCICOLIDAE), EPIZOOTIC ON THE ATLANTIC MENHADEN

    Article • Biological Bulletin, October 1973, University of Chicago Press

    Roy Sawyer

  25. A New Species of “Tentacled” Marine Fish Leech Parasitic on Notothenia from the Subantarctic Marion and Crozet Islands

    Article • Hydrobiologia, October 1972, Springer Science + Business Media

    Roy Sawyer

  26. North American Freshwater Leeches, Exclusive of the Piscicolidae, with a Key to All Species

    Article • Journal of Parasitology, August 1972, JSTOR

    Roy Sawyer

  27. North American freshwater leeches, exclusive of the Piscicolidae, with a key to all species

    Article • January 1972, Smithsonian Institution

    Roy Sawyer

  28. Erpobdellid Leeches as New Hosts for the Nematomorph, Gordius sp.

    Article • Journal of Parasitology, April 1971, JSTOR

    Roy Sawyer

  29. The phylogenetic development of brooding behaviour in the hirudinea

    Article • Hydrobiologia, March 1971, Springer Science + Business Media

    Roy Sawyer

  30. Observations on the Natural History and Behavior of Erpobdella punctata (Leidy) (Annelida: Hirudinea)

    Article • The American Midland Naturalist, January 1970, JSTOR

    Roy Sawyer