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Showing blog posts tagged with Invertebrates

Cymbomonas

Scientific Snapshots Capture Evolutionary Stepping Stone to Land Plants, Animals

Research posts

New research out of the Museum today is the first to provide definitive proof that green algae eat bacteria. The finding, captured with electron microscope images, offers a glimpse at how scientists think early organisms acquired free-living chloroplasts, the structures responsible for converting light into food. This event is thought to be a critical first step in the evolution of photosynthetic algae and land plants, which helped raise oxygen levels in Earth’s atmosphere and paved the way for the rise of animals.

Tags: Invertebrates, Our Research

Invertebrate fossils

Mobile Ammonites Stayed Put at Plains Methane Seeps

Research posts

Research led by Museum scientists shows that ammonites, an extinct type of shelled mollusk that’s closely related to modern-day nautiluses and squids, made homes in the unique environments surrounding methane seeps in the seaway that once covered America’s Great Plains. The findings, recently published in the journal Geology, provide new insights into the mode of life and habitat of these ancient animals.

In the Black Hills region of South Dakota, researchers are investigating a 74-million-year-old mound of fossilized material where methane-rich fluids once migrated through the sediments onto the sea floor. When the face of this cliff recently slumped off, a wide variety of bivalves, sponges, corals, fish, crinoids, and, as recently documented, ammonites, were revealed.

Tags: Invertebrates

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