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Astacus multicavatus Bell, 1863 is a marine lobster (Decapoda: Erymoidea: Erymidae), not a freshwater crayfish

Abstract : Crayfishes comprise a large and diverse group of freshwater lobster-like crustaceans. Despite being abundant in the recent, they are extremely rare in the fossil record. We revise a putative occurrence of Astacus multicavatus Bell, 1863 from the marine Hauterivian of Speeton Clay (Speeton, United Kingdom), which was used a few years ago as a calibration fossil representing Astacus Fabricius, 1775 for divergence time analyses. This species is actually a senior synonym to Eryma sulcatum Harbort, 1905. It so appears that Eryma multicavatum (Bell, 1863) comb. nov. is not a freshwater crayfish but a marine representative of Erymidae. Two co-occurring isolated chelae, also from the Speeton Clay, may correspond to larger, older specimens of E. multicavatum comb. nov.
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https://hal-mnhn.archives-ouvertes.fr/mnhn-03608660
Contributor : Denis Audo Connect in order to contact the contributor
Submitted on : Tuesday, March 15, 2022 - 8:54:29 AM
Last modification on : Friday, April 1, 2022 - 3:58:03 AM

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Julien Devillez, Tadashi Kawai, Denis Audo. Astacus multicavatus Bell, 1863 is a marine lobster (Decapoda: Erymoidea: Erymidae), not a freshwater crayfish. Journal of Crustacean Biology, Brill Academic Publishers, 2021, 41 (2), ⟨10.1093/jcbiol/ruab028⟩. ⟨mnhn-03608660⟩

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