Arizona elegans and Masticophis lateralis harbored five helminth species each; Chionactis occipitalis and Rhinocheilus lecontei harbored three; Masticophis flagellum harbored two and Phyllorhynchus decurtatus harbored one helmin th species.
Masticophis lateralis prefers chaparral, open hardwood-pine forest in the mountains and is especially common around water (Behler and King 1979).
This is the first report of tetrathyridia in Arizona elegans, Masticophis lateralis and Rhinocheilus lecontei.
This is the first report of cystacanths in Masticophis lateralis.
There is some dietary overlap in these snakes: Arizona elegans feeds mainly on lizards and rodents with a few birds and snakes; Chionactis occipitalis eats insects, spiders, scorpions and centipedes; Masticophis flagellum feeds on small mammals, birds, lizards, snakes, insects and carrion; Masticophis lateralis eats frogs, lizards, snakes, small mammals, birds and insects; Phyllorhynchus decurtatus feeds on small lizards and their eggs; Rhinocheilus lecontei feeds almost exclusively on lizards (Stebbins 1985; Rodriguez-Robles et al.
However, it is of interest to note that only Masticophis lateralis which is especially common in areas with water (Behler and King 1979) harbored Paralechriorchis syntomentera, a helminth requiring amphibians as intermediate hosts.
lar- vae) intestine 8, 1, -- Acanthocephala oligacanthorhynchid cystacanths body cav- ity -- Masticophis lateralis Helminth species (N = 14) Infection site P, M [+ or -] SD, R Trematoda Paralechriorchis synto- mentera esophagus [*] 7, 27, -- Cestoda Oochoristica osheroffi small intestine [*] 43, 2.