Shell Id Needed Please

[old bones]

I am posting this neat little shell for TFF member Ancient Bones. It was found in matrix sent to me by member Sacha. The matrix is Eocene from the Ocala Limestone of Florida, dredged from the channel of the Withlacoochee River. It is the first one like it that either of us have found in this matrix and we would like to know what it is. Scale is approximate. Thanks for looking.

[lissa318]

That's pretty cool old bones! I haven't found a shell like that yet. Something about it makes me wonder if it could possibly be some type of a tubular worm instead? It is interesting for sure. Looking forward to finding out what it is!

[old bones]

That's pretty cool old bones! I haven't found a shell like that yet. Something about it makes me wonder if it could possibly be some type of a tubular worm instead? It is interesting for sure. Looking forward to finding out what it is!

That's what Ancient Bones said too! It is a cool looking thing for sure.

[Herb]

I believe that is a recent shell, maybe Planorbella or Micromenetus. My best guess,

[old bones]

I believe that is a recent shell, maybe Planorbella or Micromenetus. My best guess,

Thanks Herb. I'll have to look them up.

[ted coulianos]

Modern land snail, Polygyra septemvolva; you find these a lot in and around limestone outcrops in the Everglades; the little "tooth" or callus in the aperture is diagnostic. Hope this helps.

[old bones]

Modern land snail, Polygyra septemvolva; you find these a lot in and around limestone outcrops in the Everglades; the little "tooth" or callus in the aperture is diagnostic. Hope this helps.

Thank you!

[wolf1]

Hi,

yes, Polygyra septemvolva respectively Polygyra cereolus. Pilsbry (Manual of Conchology Vol. 3, p. 129) considers P. septemvolva (Say, 1818) to be a synonym of P. cereolus (M. v. Mühlfeld, 1816, printed obviously in 1818: Gesellschaft Naturforschender Freunde zu Berlin Vol. 8 (1), p. 11). Pilsbry: “……… very variable in its growth, so as to have given rise to several synonyms. These several forms have been critically discriminated by supposed characters which simply merge together when large series of specimens are compared.” I don’t know whether recent investigations about this question have been carried out.

Kind regards :-) wolf

[old bones]

Hi,

yes, Polygyra septemvolva respectively Polygyra cereolus. Pilsbry (Manual of Conchology Vol. 3, p. 129) considers P. septemvolva (Say, 1818) to be a synonym of P. cereolus (M. v. Mühlfeld, 1816, printed obviously in 1818: Gesellschaft Naturforschender Freunde zu Berlin Vol. 8 (1), p. 11). Pilsbry: “……… very variable in its growth, so as to have given rise to several synonyms. These several forms have been critically discriminated by supposed characters which simply merge together when large series of specimens are compared.” I don’t know whether recent investigations about this question have been carried out.

Kind regards :-) wolf

Thanks from Ancient Bones and old bones for the confirmation and info on this shell. It is much appreciated.