The human remains recovered from a centuries-old shipwreck off Cape Cod did not come from an infamous pirate captain after all.

Investigators revealed Thursday that a bone fragment from the Whydah, which sank near Wellfleet in April of 1717, is that of a human male, with “general ties to the Eastern Mediterranean area’’ but did not belong to Captain Samuel “Black Sam’’ Bellamy.

The investigative team from the Whydah Pirate Museum and forensic scientists from the University of New Haven also announced that new X-rays and thermo-imaging have revealed more of the unidentified pirate’s partially clothed skeleton and that he’s “believed to be carrying what appears to be treasure in his pocket.’’

The concretion holding the remains is on display at the Whydah Pirate Museum in West Yarmouth.

The identity of the man, however, remains a mystery.

Casey Sherman, a best-selling author who’s been leading an investigation into the Whydah, had traveled to England to get a DNA sample from Simon Bellamy, one of the pirate’s descendants, to see whether his DNA matched the sample from the bone.

“We haven’t found ‘Black Sam’ Bellamy yet, but phase one of our investigation has yielded significant results,’’ Sherman said in a statement. “We now have Bellamy’s DNA to test against future discoveries and we have shed new light on the only remains of an 18th century pirate discovered in North America. Whydah archeologists will continue to examine the large concretion we now refer to as the Tomb of the Lost Pirate, while Whydah divers search for more remains in the shipwreck itself.’’

The bone fragment that was found at the site of the Whydah shipwreck was removed from a large concretion in February. Extracting DNA from it was no easy task, according to forensic scientists at the University of New Haven.

Explorer Barry Clifford, who discovered the Whydah in the 1980s, said he and his team plan to continue their search of the shipwreck in the coming weeks. “The dive site is hallowed ground for us,’’ Clifford said in the press release. “It’s not only the site of a shipwreck, but it’s a burial ground for Captain ‘Black Sam’ Bellamy and members of his crew. . . . We will continue to handle this investigation with sensitivity and respect while understanding the full historical significance of what we are doing.’’

Emily Sweeney can be reached at esweeney@globe.com.