GASTROINTESTINAL HELMINTHS OF YARROWS SPINY LIZARD, SCELOPORUS-JARROVII (PHRYNOSOMATIDAE) IN MEXICO

Three-hundred sixty-one Sceloporus jarrovii from 16 states in Mexico w ere examined for gastrointestinal helminthis. Two species of cestodes, Oochoristica scleopori and Mesocestoides sp; 14 species of nematodes, Abbreviata terrapenis, Macdonalis grassi, Physaloptera retusa, Piratu ba prolifica, Scatonema wulkeri, Skrjabinoptera phrynosoma, Spauligodo n giganticus, Strongyluris dsimilis, Thubunaea iguanae, Thubunaea inte stinalis, Ascarops sp, Gongylonema sp, Mermis sp, Psysocephalus sp and one species of acanthocephalan, Centrorhynchus sp, were found. With t he exception of Abreviata terrapensis and Thubanaea intestinsalis, the se helminths have been found in other lizards. Throughout the range of S-jarrovii in Mexico, the predominant monoxenous (direct life cycle) helminth was Spaugligodon giganticus (prevalence 68%); the predominant heteroxenous (indirect life cycle) helminth was Physaloptera retusa ( prevalence 27%). Sceloporus jarrovii is a new host record for Macdonal dius grassi, Piratuba prolifica, Skrjabinoptera phrynosoma, Thubanaea iguanae, Ascarops sp, Gongylonema sp, Physocephalus sp and Centrorynch us sp.