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Vordigern

Cretaceous Woodbury Formation Surprises

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rod

Nice crab!

With the pics available, I would feel comfortable saying Dakoticancer sp.. The differences between Tetracarcinus and Dakoticancer are very subtle and it is hard to tell form these pics.

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trout hunter

nice quarter, i have one too but in bit better condition...but too bad mine is not the super valuable one.

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Vordigern

thanks everyone for the info and help IDing this fossil, this is my first crab so I am in no way qualified to give a definitive decision on this crab but from my perspective Im going with Dakoticancer. The 2 crab species are very similar but the one proportion that I am basing my decision on is the center "pointy hourglass" details. The same area on Tetracarcinus seems to cover a much larger surface area but on Dakotacancer, as well as my specimen ,it is more compact. So for purposes of lableing this specimen I am going with Dakotacancer until I find a better specimen to change my mind :)

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Vordigern

nice quarter, i have one too but in bit better condition...but too bad mine is not the super valuable one.

what is the super valuable one?

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Auspex

what is the super valuable one?

1916.

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The Jersey Devil

Definitely a Tetracarcinus. Looks like a steinkern.

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Carl
19 hours ago, The Jersey Devil said:

Definitely a Tetracarcinus. Looks like a steinkern.

A steinkern wouldn't likely preserved the pustulose ornamentation. This is almost certainly the actual shell or possibly a cast, although these sediments are way more likely to have preserved the actual carapace.

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The Jersey Devil
4 hours ago, Carl said:

A steinkern wouldn't likely preserved the pustulose ornamentation. This is almost certainly the actual shell or possibly a cast, although these sediments are way more likely to have preserved the actual carapace.


Hey Carl,

I agree with you on that now that I see the external ornament. At first I thought it looked like a steinkern because of the coloration, but it just appears to be very mineralized.

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frankh8147

@Vordigern I know this is an old post that got brought back but that is a really exceptional fossil! Whatever happened to this specimen - is it still around? I ask because there were a good amount of studies on New Jersey crabs since this post...

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