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Take this proposal with a grain of salt. Posting it here because I didn't know where else to post it.

 

References:

https://www.mindat.org/taxon-8521156.html

https://en.m.wikipedia.org/wiki/Callianassa

https://pubmed.ncbi.nlm.nih.gov/36095673/

https://nathistoc.bio.uci.edu/crustacea/Decapoda/Neotrypaea californiensis/index.htm

 

C. mortoni material I used in my research:

20230720_215806.thumb.jpg.8c77a3ad27afa32ffee8ecc2b352ccf3.jpg

 

Proposal:

20230720_215230.thumb.jpg.8b5737c4e61e4962c735312aae3ec27e.jpg

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And here's the reconstruction. (Based on both N. californiensis and C. ogurai)

20230720_235807.jpg

Edited by Fullux
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Moved to General Fossil Discussion. ;)

    Tim    VETERAN SHALE SPLITTER

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I'd recommend taking a look in the original publications where the genera Callianassa and Neotrypaea are erected to see what diagnostic characters are used to identify them. Compare the diagnosis to a large sample size of specimens before recommending taxonomic changes. 

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