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Crab Id Help When Someone Has A Moment :)


claire01

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I recently got an ID on a crab I posted a while back (not from anyone here on The Forum) as Cenomanocarcinus Van Straeleni, but I posted a crab I found today on the Q and A section and someone suggested the new crab was C. Van Straeleni, but they look very different to me. Just want to make sure the first one wasn't misidentified. Thanks!

Both crabs:

http://imgur.com/a/62TY1

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I cannot help with i.d., but sexual dimorphism may be the case. Smaller, ornate male and a larger female.

MB would be in the know.

"I am glad I shall never be young without wild country to be young in. Of what avail are forty freedoms without a blank spot on the map?"  ~Aldo Leopold (1887-1948) 

 

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crabs can look very different depending on the amount of shell preserved, have seen them as basically steinkerns and some with all the original shell ornamentation

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  • 1 year later...

Plax is correct, claire01--Your two crabs are one in the same, and both are C. vanstraeleni. I see this post is over 1.5 yrs old now (I seldom get on FF). Have you prepped out your second specimen yet? If so, could you share images of it? Those are very nice specimens. Are they from the same geologic unit? Britton Shale? Plax and I are currently working on describing a Cenomanocarcinus from North Carolina that is most likely C. vanstraeleni, but it has a more quadrate body outline (when viewed from above/below), which produces a notably greater length:width ratio; however, it is possible the different body shape could be due to its odd preservation, which might involve some compressive distortion.

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