Publication Date:
2019
Description:
〈span〉〈div〉Abstract〈/div〉Erymid lobsters (Crustacea, Decapoda, Erymidae) are an important component of Mesozoic crustacean faunas in Europe, especially during the Jurassic. The 29 species reported from the Early and Middle Jurassic are the oldest found in Western Europe and North America, and constitute an important part of the evolutionary history of these lobsters. After the review presented here, 24 species are maintained within the genera 〈span〉Eryma〈/span〉 Meyer, 1840 (7 species), 〈span〉Palaeastacus〈/span〉 Bell, 1850 (5 species), 〈span〉Pustulina〈/span〉 Quenstedt, 1858 (2 species) and 〈span〉Stenodactylina〈/span〉 Beurlen, 1928 (9 species). All these species, with the exception of 〈span〉Eryma ventrosum〈/span〉 (Meyer, 1835), have a new description and the diagnoses of the genera 〈span〉Eryma〈/span〉, 〈span〉Palaeastacus〈/span〉 and 〈span〉Stenodactylina〈/span〉 are emended. Four species are transferred to another genus: 〈span〉Palaeastacus numismalis〈/span〉 (Oppel, 1862) n. comb., 〈span〉Palaeastacus foersteri〈/span〉 (Feldmann, 1979) n. comb. and 〈span〉Stenodactylina guisei〈/span〉 (Wright, 1881) were previously assigned to 〈span〉Eryma〈/span〉, and 〈span〉Stenodactylina spinosa〈/span〉 (Étallon, 1861) n. comb. was previously assigned to 〈span〉Palaeastacus〈/span〉. Our study shows that 〈span〉Stenodactylina〈/span〉 was the most diversified genus in Early – Middle Jurassic, but the fossils of 〈span〉Eryma〈/span〉 are more common. Furthermore, 〈span〉Eryma compressum〈/span〉 (Eudes-Deslongchamps, 1842) is the emblematic species of Erymidae Van Straelen, 1925 during the end of Early Jurassic and Middle Jurassic in Western Europe (Toarcian – Bathonian). This species includes now 〈span〉Eryma bedeltum〈/span〉 (Quenstedt, 1858) in its synonymy. The genus 〈span〉Pustulina〈/span〉 is very rare and the specimens show some characteristics on their carapace recalling other erymid genera (an almost sinuous hepatic groove for example), that are absent in more recent species. Finally, we point out that only 〈span〉E. compressum〈/span〉, 〈span〉P. foersteri〈/span〉 and 〈span〉Stenodactylina walkerae〈/span〉 (Feldmann and Haggart, 2008) are reported outside Europe.〈/span〉
Print ISSN:
0037-9409
Electronic ISSN:
1777-5817
Topics:
Geosciences
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