https://www.thefossilforum.com/gallery/album/2991-fauna-and-flora-of-the-austin-group-in-texas/Latest Imagesenhttps://www.thefossilforum.com/gallery/image/51512-t-peramplum-2/ This Tridenticeras peramplum specimen is 2.9 cm in height, and 1.9 cm in diameter. It shows the typical three rows of tubercles on each oblique rib, except on the most mature, bottom whorl. What I can tell from my references is that this is because only the phragmocone has tubercles, and thus the bottom whorl is the living chamber. 

]]>51512Sun, 15 Mar 2020 22:14:57 +0000https://www.thefossilforum.com/gallery/image/51511-t-peramplum-1/ This specimen is the largest of its genus in my collection, and the largest known to me in any collection. It measures about 7 cm in height, and 4.3 cm in diameter. It retains its tubercles in the most mature whorl sections that are preserved well enough to tell. The specimen is quite crushed.

]]>51511Sun, 15 Mar 2020 20:08:37 +0000https://www.thefossilforum.com/gallery/image/51510-t-peramplum-1/ This specimen is the largest of its genus in my collection, and the largest known to me in any collection. It measures about 7 cm in height, and 4.3 cm in diameter. It retains its tubercles in the most mature whorl sections that are preserved well enough to tell. The specimen is quite crushed.

]]>51510Sun, 15 Mar 2020 20:09:51 +0000https://www.thefossilforum.com/gallery/image/51509-t-peramplum-1/ This specimen is the largest of its genus in my collection, and the largest known to me in any collection. It measures about 7 cm in height, and 4.3 cm in diameter. It retains its tubercles in the most mature whorl sections that are preserved well enough to tell. The specimen is quite crushed.

]]>51509Sun, 15 Mar 2020 20:11:01 +0000https://www.thefossilforum.com/gallery/image/51508-t-peramplum-1/ This specimen is the largest of its genus in my collection, and the largest known to me in any collection. It measures about 7 cm in height, and 4.3 cm in diameter. It retains its tubercles in the most mature whorl sections that are preserved well enough to tell. The specimen is quite crushed.

]]>51508Sun, 15 Mar 2020 20:12:05 +0000https://www.thefossilforum.com/gallery/image/51507-t-peramplum-1/ This specimen is the largest of its genus in my collection, and the largest known to me in any collection. It measures about 7 cm in height, and 4.3 cm in diameter. It retains its tubercles in the most mature whorl sections that are preserved well enough to tell. The specimen is quite crushed.

]]>51507Sun, 15 Mar 2020 20:14:02 +0000https://www.thefossilforum.com/gallery/image/51506-t-peramplum-1/ This specimen is the largest of its genus in my collection, and the largest known to me in any collection. It measures about 7 cm in height, and 4.3 cm in diameter. It retains its tubercles in the most mature whorl sections that are preserved well enough to tell.

]]>51506Sun, 15 Mar 2020 20:03:23 +0000