Chalice? ID

[maus42]

Ok guys, curious as to this one. The large mouth is about half dollar size with numerous much smaller heads. Some very old exposed skeleton shows a skeleton much akin to what you'd expect a blasto. wellsi or acan echinata... only bigger in diameter. It's also totally encrusting, so I'm pretty sure it's not a chalice.

Which begs the question... what did I buy.

Top View (day I bought it)

Side View, Latest Pic (coloring back up after having it under improper lighting)

 

[wicked demon]

there are many species in the pectinidae family we call chalices, I would deinatly say it is in that family, but not an echinophyllia aspera as most are used to seeing as a "chalice". I would even go so far to say it is an echino species though.

 

[maus42]

there are many species in the pectinidae family we call chalices, I would deinatly say it is in that family, but not an echinophyllia aspera as most are used to seeing as a "chalice". I would even go so far to say it is an echino species though.

Hrmm.. looks like I might have to bust open the big books and figure it via skeleton analysis since there is some very old bits of it showing. But yeah, I was thinking echino_something_, but wasn't sure. I've never seen such size disparity in mouths before.