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Bobby Boessenecker posted a new activity comment 5 years, 5 months ago
5 years, 5 months ago5 years, 5 months agoHi all – this is not a phocoenid, but instead appears to be a eurhinodelphinid dolphin. cf. Eurhinodelphinidae
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Bobby Boessenecker replied to the topic Unknown Belgrade bone in the forum What Is It? 6 years, 5 months ago
6 years, 5 months ago6 years, 5 months agoHi all,
One possibility for this bone is a phalanx of a primitive mysticete or odontocete. The flattened articular surface is characteristic of Neoceti. Archaeocetes like Eocene basilosauridae (e.g. Dorudon atrox, shown here – from Uhen, 2004) have quite narrow elongate metacarpals and phalanges, unlike extant Neoceti.
This is surprisingly…[Read more]
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Bobby Boessenecker replied to the topic Whale fossils on the beach in the forum What Is It? 6 years, 5 months ago
6 years, 5 months ago6 years, 5 months agoHi all, sorry for the delayed response! Thanks for tagging me, Eleanor. Definitely from a large cetacean, and if Pliocene or late Miocene, baleen whale is the most likely possibility. Unfortunately as @lcone stated above, it’s not really possible to say much more about the specimens.
HOWEVER – please keep your eyes peeled for skull fragments and…[Read more]
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Bobby Boessenecker replied to the topic Andalusia, Alabama help id in the forum What Is It? 6 years, 10 months ago
6 years, 10 months ago6 years, 10 months agoYeah thanks, the age information is pertinent for those of us unfamiliar with local stratigraphy. Again, I’m not a reptile guy, but you should look into comparisons with sea turtles as well. Don’t know anything about Eocene crocs.
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Bobby Boessenecker replied to the topic Andalusia, Alabama help id in the forum What Is It? 6 years, 10 months ago
6 years, 10 months ago6 years, 10 months agoWell it’s procoelous (or possibly amphicoelous) so the most likely options are mosasaur or crocodilian. I have a hunch it’s the former, but I’m not a reptile guy!
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Bobby Boessenecker replied to the topic K-5 lesson plans–Santa Cruz, California in the forum K-12 Fossils and Lessons Forum 7 years ago
7 years ago7 years agoHi Laura,
Unfortunately I’m on the east coast and don’t really have access to that locality. However, I suggest getting in touch with local collector Chris Pirrone (cpirrone [at] pirronelaw.com) who is one of my avocational colleagues in the bay area, and knows the local stratigraphy quite well.
Cheers, Bobby
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Bobby Boessenecker posted a new activity comment 7 years, 5 months ago
7 years, 5 months ago7 years, 5 months agoHi all! Thanks @llundgren – hello @jessie-matheny – @sboessenecker and I are at the Mace Brown Museum of Natural History at College of Charleston. We should stay in touch! Bobby
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Bobby Boessenecker replied to the topic K-5 lesson plans–Santa Cruz, California in the forum K-12 Fossils and Lessons Forum 7 years, 11 months ago
7 years, 11 months ago7 years, 11 months agoHi all and @bmacfadden, I had a successful two hour visit to Capitola yesterday and found some articulated Cetorhinus vertebrae, a dermochelyid turtle shell element (leatherback) as well as the full compliment of calianassid shrimp claws (7-9 specimens) and Dendraster sand dollars (about 7 specimens) you guys need. The shrimp claws are easy enough…[Read more]
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Bobby Boessenecker replied to the topic K-5 lesson plans–Santa Cruz, California in the forum K-12 Fossils and Lessons Forum 7 years, 11 months ago
7 years, 11 months ago7 years, 11 months agoAlso for some weird reason I can’t see any text in this text box while I’m typing – the text color comes in as white. Any tips or is it just broken?
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Bobby Boessenecker replied to the topic K-5 lesson plans–Santa Cruz, California in the forum K-12 Fossils and Lessons Forum 7 years, 11 months ago
7 years, 11 months ago7 years, 11 months agoHi @bmacfadden, sure thing – I may be going to Santa Cruz tomorrow, and if so, will collect some calianassid claws; or, if not tomorrow, sometime later in the week. Any other requests for other invertebrates? I could probably include some whale bone fragments as well.
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