Cloudinid

Cloudinids (Cloudinia) are an extinct animal phylum that formed small
tubelike or conical fossils consisting of "cup-in-cup" segments of
calcareous material. What the animal itself looked like is still unknown.

Cloudinia are characteristic of the so-called 'Small Shelly Fauna' in the
final Neoproterozoic period, called the Tommotian, and disappeared in the
extinction event that marks the Cambrian boundary, most recently dated
542mya. The extinctions (which didn't affect microbes, however) are
connected with the worldwide glaciation often referred to as 'Snowball
Earth' and set the stage for the Cambrian explosion of life-forms.

How to - Physics - History - Companies - Internet - Video Games - List of Phobias - September 11, 2001
Radio - Timelines - Chemistry - Genealogy - Family - Film - SARS - Cancer - Medicine - DVD - Calendar
Countries - Disease - Health Science - Dentistry - Economics - AIDS - Law - Autism - Statistics - Bible
Recipes - Architecture - Computers - History of the Internet - Personal computer - Apple Macintosh
War - Presidents of the United States - United States Constitution - Universe - Philosophy - Animals
Biology - United States Constitution - Marketing Topics - Sports - Television - History of Computing

Flights - Mobile Phones - Credit Card Consolidation - Wedding rings - Art Prints