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bthemoose

The two shark teeth below are recent personal finds from the Nanjemoy Formation (early Eocene) in Maryland. I'd appreciate any help in ID'ing them.

 

#1: Jaekelotodus robustus?

 

I've been calling this one Jaekelotodus robustus and am curious if that's correct. 

 

This tooth measures 27 mm on the slant.

 

1818351744_ID-14.jpeg.764cbeb3a705b334cec03d3c0bcf0360.jpeg

 

477200915_ID-15.jpeg.54d410a9c07d67081131e462edb686f9.jpeg

 

1303541207_ID-17.jpeg.23b4af3a0109077b8ea959e23d8ffa91.jpeg

 

1456317077_ID-16.jpeg.1b8656cbfd895d766025d6a350ccc824.jpeg

 

339011423_ID-19.jpeg.c75d558c38c2f5257f3ff292d5b096cc.jpeg

 

1793312512_ID-18.jpeg.02e841aa9bb646d9422cc35ee27d12b9.jpeg

 

 

#2: Brachycarcharias lerichei?

 

This second tooth has me stumped. I'm leaning toward Brachycarcharias lerichei, but would not be surprised to find out it's something else!

 

This tooth measures a little over 22 mm on the slant.

 

1253816536_ID-8.jpeg.bf86770703d551531f668950ea7b6642.jpeg

 

2137500599_ID-9.jpeg.360388e0d09ca3b1242472e52ef312f5.jpeg

 

821703165_ID-11.jpeg.f9ca035e267143d9ba958e5b69e399e5.jpeg

 

806193371_ID-10.jpeg.2e71f5b15b3394a3d5432f68cffe5001.jpeg

 

1612339727_ID-12.jpeg.876bbbf69e877c20e6a35afb6c375dba.jpeg

 

1541545235_ID-13.jpeg.4167677bb9af58dcfe249fdb54947396.jpeg

 

Thanks in advance for any help you can provide!

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hemipristis

#2: Striatolamia sp. upper lateral?

Screen Shot 2021-07-10 at 10.43.03 AM.jpeg

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bthemoose

@hemipristis, I think you might be right about that one--the cusplets seemed too triangular to me, but I'm more familiar with S. striata than macrota and from the Elasmo dentition it looks like a pretty good match. Thanks!

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MarcoSr
12 hours ago, bthemoose said:

@MarcoSr, I wonder if you might have thoughts on these? Thanks!

 

#1: Jaekelotodus robustus

#2: Striatolamia macrota

 

Marco Sr.

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bthemoose
45 minutes ago, MarcoSr said:

 

#1: Jaekelotodus robustus

#2: Striatolamia macrota

 

Marco Sr.

 

Thanks so much!

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