Studies on the Parasitic Helminths of the North Central States. I. Helminths of Sciuridae

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Abstract
Distr. and incidence data are given for helminths of each common sciurid sp. in the states of Ohio, Michigan, Illinois, Wisconsin, and Minnesota. Apparently new records of parasites from their respective hosts are: Catenotaenia pusilla, Mesocestoides latus, and Enterobius sciuri from Sciurus niger rufiventer Rictularia halli from Sciurus carolinensis leucotis Rictularia sp., Ascaris sp., Heligmodendrium hassalli, and Strongyloides sp. from Tamiasciurus hudsonicus Hymenolepis sp., H. diminuta, Trichostrongylus sp., Trichuris sp., and Capillaria sp. from Tamias striatus E. sciuri, Citellinema bifurcatum, and Capillaria sp. from Glaucomys v. volans C. pusilla and Syphacia thompsoni from G. sabrinus macrotis Cysticercus sp. from Citellus t. tridetemlineatus Capillaria sp. from C. franklini Quinqueserialis hassalli from Marmota monax C. bifurcatum, Syphacia sp., and Moniliformis sp. from Eutamias minimus jacksoni. No evidence was found to indicate that helminth parasites had a significant effect on population density in the areas where collecting was done. The natural host of E. sciuri in the region studied appeared to be G. v. volans since it was not taken from the type host S. carolinensis, and was infrequent in S. n. rufiventer. Ascaris laevis Leidy will probably prove to be a synonym of A. lumbricoides or A. columnaris, not of A. pigmentata C. bifurcatum seems to have a wider and more northerly distr. than H. hassalli. Hymenolepis citelli (Mc-leod) was considered a synonym of H. diminuta.
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