Fossil Sponge - Astraeospongia meniscus - 419,000,000 Years Old rockinaboxbrittlestar In certain animals

In certain animals

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This was based on their similar body shape and ecological roles

For thousands of years

Fossil Sponge - Astraeospongia meniscus - 419,000,000 Years Old rockinaboxbrittlestar In certain animalsSponges are sessile filter feeders that thrive across the world's oceans. First appearing nearly 600 million years ago, sponges are the earliest complex lifeforms on the planet. This specimen is a complete 1. 5 2" Astraeospongia meniscus sponge fossil, preserved in beautiful detail. It was recovered on private land in Tennessee and dates to the Silurian Period over 419,000,000 years ago. Each specimen comes complete with an informational card that