Tag Archive for 'Euthycarcinoidea'

Microbial mat chips scattered on a Cambrian tidal flat surface. Image credit: Nora Noffke.

Why Geologists Love Pond Scum

Apr 27, 2026 by Kenneth C. Gass

If you’ve ever wondered how geologists know so much about ancient beaches and shallow oceans — from the paleoenvironment to the animals roaming...

The mollusk trail Climactichnites blackberriensis (Cb) presumably stopping to eat a scyphozoan (jellyfish) that had washed up on shore. CS = clasts of a scyphozoan; DS = decomposing scyphozoan; R = ripple marks; S = scyphozoan.

Ancient Tidal Flats Were Busier Than We Thought

Apr 14, 2026 by Kenneth C. Gass & Nora Noffke

New trace fossil discoveries from the half-billion-year-old Cambrian tidal flats of Wisconsin at a site called Blackberry Hill continue to paint the picture...

Reconstruction of the first animals on land, an ancient tidal flat at Blackberry Hill (500 million years ago), Wisconsin. Stranded jellyfish (1 m wide), the euthycarcinoid Mosineia (bottom left, 15 cm long), phyllocarid crustacean Arenosicaris (bottom right, green) and large slug‐like mollusc (70 cm long). Some euthycarcinoids occupy a tidal pool before it dries up. Image credit: Todd Gass.

The First Animals on Land Evolved in Warm Tidal Nursery Pools 500 Million Years Ago

Jul 26, 2024 by Simon Braddy

The evolution of the first animals on land, 500 million years ago, has been revealed. The ancestors of millipedes, called euthycarcinoids, evolved in warm...