Peruvian Fossil Points to a Colossal Prehistoric Freshwater Turtle
A fossil shell from Peru’s Amazon region shows that the extinct side-neck turtle Chelus colombiana grew much larger than its living relatives. The larger specimen measured 84.6 cm and was estimated to weigh about 65 kg, making it the biggest complete shell known for this genus and species. The turtle lived roughly 10 to 15 million years ago in northern South American wetlands.
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... No extra. Need plain text. Ensure under 120 words total for EXPANDED. We have 117. Need maybe "MUSM-5003" found 2010 near Iquitos. Good. But "New Peruvian fossils include MUSM-920... and MUSM-5003..." The second specimen was found in lignite deposits near Iquitos. We didn't mention lignite. Fine. "Both are held..." omitted. Good. Need check "entirely original wording, never copying source phrasing." We have phrases like "flattened, camouflaged shell" source says "flattened, rough, highly camouflaged shell". "ambush feeding" source "ambush prey". "slow northern South American waters" source "slow-moving rivers, swamps... northern South America". "most complete known for this genus and species" source "largest completely preserved shell ever recorded for genus and species" but we changed. "Pebas system's southwestern edge" source "southwestern edge of the Pebas system". That's close but factual. Could rephrase "southwestern boundary of the Pebas system". "Miocene northern South Amer