Due to the uncertain age of the formation these come from, we say they are D/C Boundary.
Maple Mill Formation
Kalona, Washington County
Iowa
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Image Comments
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By citronkitten · Posted
OR Sylvestrilamia teretidens based on crown extending out to cusplets
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By citronkitten · Posted
OR Sylvestrilamia teretidens based on crown extending out to cusplets?
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By bthemoose · Posted
@Fin Lover, this ID is based on input that @siteseer provided here:
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By Fin Lover · Posted
Based on the enamel "shelf" on the labial side, I would have IDed this as a retroflexus. May I ask what features indicate desori?
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By Samurai · Posted
Oh! I am so sorry for the late reply as I never got the notification. Sadly I have not, besides a familial (mostly superficial) resemblence to the modern ratfish (probably from the same diet) I have not gotten any clear answers.
Jokes aside, a true Id may never come unless far into the future. I still have hope one day someone can help with this ID.
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By Balance · Posted
Bucket list… only half of one so far. That’s just lovely. It’s absolutely still, “delicate”. I don’t know if that makes sense. Of course it’s delicate, but I just mean its vibe is still contained. The broken pieces, even if large and visibly pretty, are missing the delicacy of a sand dollar. So they feel like a piece of fossil instead of what they are.
Sorry for rambling. Currently looking through your awesome pictures to try and find a new tooth I found.
Jp
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By Fin Lover · Posted
I enjoy finding these teeth because every one of them has had a different variation of the cusps.
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By Notidanodon · Posted
Interesting tooth, cusps remind me of araloselachus from germany
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