[Metacercaria of Cyathocotyle prussica Mühling, 1896 (Cyathocotylidae, Trematoda)].
Cyathocotylid larvae were found in the musculature of Gobio gobio and Leuciscus leuciscus from the cut-off part of the Ishim river (West Sibiria). Experimental infection of domestic ducklings has shown that the metacercariae are the larvae of C. prussica. They differ from the other known larvae of Cyathocotylidae from musculature of fishes of Europe and Asia in having a larger Brandes'organ.Located just 30 miles outside of Denver, Colorado, the West Bijou Site might look like just another picturesque region of rolling hills and wildflowers, but it marks a critical moment in the Earth’s history—right when the dinosaurs went extinct, and the Cenozoic Era began, Deb Stanley reports for ABC Denver. For years, paleontologists hoping to take a peek at what the world was like at that time have traveled to the site, and now, it's being honored and protected as the United States’ newest National Natural Landmark.

Spanning 7,613 acres, the West Bijou site has long been lauded for its rich fossil record and hints at what happened after an asteroid strike doomed much of the life on the planet. In particular, scientists have been taken with a narrow,