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Showing results for tags 'tridenticeras peramplum'.
Found 7 results
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Excerpt from W. J. Kennedy (1984): " Family NOSTOCERATIDAE Hyatt, 1894 [Jouaniceratidae Wright, 1952, p. 218; Bostrychoceratinae Spath, 1953, p. 16; Emperoceratinae Spath, 1953, p. 17; Hyphantoceratinae Spath, 1953, p. 16] Genus TRIDENTICERAS Wiedmann, 1962 Type species. Turrilites tridens Schlüter, 1876, p. 136, pl. 35, fig. 9; pl. 36, fig. 1; by original designation. Diagnosis. Turricone, ornamented by strong, flared ribs with three rows of tubercles, the lower two close together, and with non-tuberculate finer ribs between. Discussio
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- atco formation
- lasswitz 1904
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From the album: Fauna and Flora of the Austin Group in Texas
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. -
From the album: Fauna and Flora of the Austin Group in Texas
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. -
From the album: Fauna and Flora of the Austin Group in Texas
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. -
Upper Coniacian Austin Chalk Vertebrate Remains, North Texas
Heteromorph posted a topic in Fossil ID
At a site where I have been finding heteromorphs, I have recently come across some vertebrate material. So far I have only found three vertebrate specimens; one bone fragment and two fish scales. I am hoping to get some information on their affinities. I am most interested in the fish scales, since it seems they would be the most easily identified. The site is in North Texas, the Austin Chalk group, Atco formation, upper Coniacian stage. For biostratigraphic reference, at this same site I have also found the ammonites Protexanites planatus, Phlycticrioceras trinodosum, Tridenticer- 13 replies
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- austin chalk group
- atco formation
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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!
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I have a Tridenticeras peramplum ammonite steinkern from the Austin Chalk that has part of it incrusted with algae/moss from sitting in a small creek where I found it. What would be recommended to clean moss off of chalk fossils, not just ammonites? What ever the method that is recommended I would first try it out on a fossil-less chunk of chalk to make sure that the process wouldn’t be detrimental to the matrix. I also don’t want to scratch the fossil by scrubbing it with something overly abrasive since the matrix weakens when wet. I usually use a soft bristled toothbrush for cleaning dirt of