Genus Palaeastacus Bell, 1850

(Fig. 1 F-G)

Palaeastacus Bell, 1850: 344 . — Zittel 1885: 695. — Beurlen 1928: 180. — Förster 1966: 126. — Glaessner 1969: 626. — Aguirre-Urreta & Ramos 1981: 606. — Aguirre-Urreta 1989: 509. — Schweitzer & Feldmann 2001: 174. — Feldmann et al. 2015: 3. — Hyžný et al. 2015: 375. — Devillez et al. 2016: 525, fig. 1G-H. — Devillez et al. 2017: 782.

Enoploclytia Palaeastacus – Mertin 1941: 161. — Glaessner 1969: 455.

TYPE SPECIES. — Astacus sussexiensis Mantell, 1824, by subsequent designation of Glaessner (1929).

DIAGNOSIS BY Devillez & Charbonnier (2019). — Fusiform intercalated plate; deep cervical groove, joined to dorsal margin and to antennal groove; short gastro-orbital groove, originating as a slight median inflexion of the cervical groove; postcervical and branchiocardiac grooves subparallel, joined to hepatic groove; hepatic groove concavo-convex, joined to cervical groove; inferior groove convex posteriorly, joined to hepatic groove; chelate P1; P1 propodus short, thick, slightly globose, with a narrow dactylar bulge; P1 fingers usually wide, slightly longer than propodus, progressively narrowing to their distal extremity, occlusal margin curved at the basis of the index.