Hoploparia gammaroides (McCoy 1849)

The family Nephropidae that Hoploparia gammaroides is apart of is still alive today. 

On the left is an image of a relative of Hoploparia gammaroides. 

Acknowledgments:

Thank you very much Andy Hopkinson and Gary Walker for allowing usage of the images on this page. 

References:

https://www.marinespecies.org/aphia.php?p=taxdetails&id=1594253

"A monograph of the fossil malacostracous Crustacea of Great Britain" 

[Contributions to British palæontology : or, First descriptions of three hundred and sixty species and several genera of fossil Radiata, Articulata, Mollusca, and Pisces from the Tertiary, Cretaceous, Oolitic, and Palæozoic strata of Great Britain]

https://www.gbif.org/occurrence/417188395 

https://www.gbif.org/occurrence/417327004 

https://www.gbif.org/occurrence/419291601 

https://www.gbif.org/occurrence/351377224 

https://science.mnhn.fr/institution/mnhn/collection/f/item/r03867?listIndex=21&listCount=31 

https://science.mnhn.fr/institution/mnhn/collection/f/item/r03868?listIndex=22&listCount=31 

https://science.mnhn.fr/institution/mnhn/collection/f/item/r03869?listIndex=23&listCount=31 

https://www.mindat.org/taxon-4646503.html 

https://en.wikipedia.org/wiki/Nephropoidea 

Further reading:

https://ia600407.us.archive.org/26/items/palaeontology30341987pala/palaeontology30341987pala.pdf 

http://www.sheppeyfossils.com/pages/lob3.htm 

English Eocene Crustacea (lobsters and stomatopod)