Chambered Nautilus, 'Living Fossil' Depleted by International Shell Trade, Moves Toward Endangered Species Act Protection. OAKLAND, Calif.—The National Marine Fisheries Service today announced it will ...

Like its fellow marine dweller the horseshoe crab, the chambered nautilus hasn't changed much in 400 million years. The pair are actually considered living fossils. The nautilus dominated the ...

Squires had a collection of nautiloid fossils from 50-million-year-old rocks in Washington State, and in 1988 he published a paper describing these as the oldest chambered nautilus fossils ever found.

Chambered Nautilus Receives Much-needed International Protection . Ancient Mollusk, in Demand for Beautiful Shells, Threatened by Trade. JOHANNESBURG, South Africa— Nations around the world today ...

A Living Fossil Returns Allonautilus scrobiculatus, spotted again after 30 years. ... Illegal fishing and “mining” operations for nautilus shells are threatening their populations.

"Some features of the nautilus -- like the shell giving it the 'living fossil' label -- may not have changed for a long time, but other parts have," said Ward. Allonautilus also sports a ...

As part of a project to survey nautilus populations, Ward and a team of researchers baited a stick with fish and chicken meat, suspended it between 500 and 1,300 feet (152 and 396 meters) below ...

The nautilus is a mollusk that has survived on Earth for about 500 million years, but today, they're endangered by shell collectors. Photograph by ENRIC SALA, Nat Geo Image Collection 3.

If you look at the fossil shells of ammonoids over the course of that 340 million years, you'll notice something striking--as time goes on, ... Nautilus shells have a similar coating.