Cameron, T. W. M., "The Internal Parasites of Domestic Animals", 152 (1934). Faust, E. C., "Human Helminthology", 563, 645, 720 (2nd edit., 1939. Mönnig, H. O ...
A body fossil of a thorny-headed worm (Acanthocephala) has been dated to the Jurassic period, about 165 million years ago. It has characteristics of both Acanthocephala and tiny animals called ...
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