Turtle polystomes belong to the family Polystomatidae (Monogenea) which comprises the genera Neopolystoma, Polystomoidella and Polystomoides. Available literature on this cosmopolitan group of flatworm parasites is scattered in the scientific literature of sometimes poorly known journals. To complicate matters, original descriptions were published in various languages and many synonyms for species exist. This book provides a systematic summary of all known turtle polystome species. For each species, it provides information on the host, site of the parasite in the host, geographic distribution, type locality, type specimens, collection where types are housed, parasite measurements and drawings of the type specimens. This book will serve as a valuable source of information to parasitologists as well as herpetologists specialising in turtles.