inhibitor tridegin, a platelet adhesion inhibitor (leech anti-platelet protein; LAPP), and the fibrinogen-dissolving enzymes hementin and hementerin. T. tessulatum also yields therin, theromin and tessulin, which inhibit protease activity. Ornatins, which are antiplatelet glycoprotein IIb-IIIa antagonists, were discovered in Placobdella ornata, and several species have yielded hyaluronidases. Line notes References Joel Cracraft and Michael J. Donoghue (2004) Assembling the Tree of Life, Oxford University Press, USA, 592 pages C. Michael Hogan (2008) Rough-skinned Newt ("Taricha granulosa"), GlobalTwitcher, ed. N. Stromberg Leeches Annelid families Taxa named by Léon Vaillant