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Showing results for tags 'inoceramid oysters'.
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On Friday my mother and I went to the same rock pile where she found this as of yet unidentified heteromorph ammonite exactly 5 weeks prior. We had been there multiple times since she found it but every trip was a bust because we had surface picked it as much as we could the first time. But within the last few days the pile had been turned up again when part of it was used to level a flat surface to pour a driveway. Because this site is so rich in rare heteromorphs I decided that it would be wise to hunt around it again. It had indeed been rejuvenated and the hunt was an hour well spent! We had only been there a minute or two when I found my first Tridenticeras peramplum ammonite of the day. It was laying amongst the rocks used to level the ground a few feet away from the pile. It is only an external impression but very detailed. The ribs and tubercles are well defined all over the preserved specimen even on the tiny uppermost whorl as clearly shown in P1 - P3. This is the 9th T. peramplum specimen in my collection and the 2nd impression only specimen. It is also the second impression to preserve one of the whorls closest to the apex. It is in association with an inoceramid just above it. FIG 1 - FIG 6, Specimen 1: Total shell height is 29mm, total shell diameter is 15mm. Ruler is in millimeters. FIG 1: T. peramplum is trituberculate with the bottom two tubercles being closer together. FIG 2: FIG 3: This picture shows especially clearly the detail on the uppermost whorl. FIG 4: FIG 5: FIG 6: Continued in next post...