Eryma Meyer, 1840

Charbonnier, Sylvain, Garassino, Alessandro, Gendry, Damien, Devillez, Julien & Picot, Laurent, 2023, The decapod crustacean fauna from the Late Jurassic of Cricqueboeuf, Normandy (France), Geodiversitas 45 (19), pp. 573-588 : 582

Genus Eryma Meyer, 1840

TYPE SPECIES. — Macrourites modestiformis Schlotheim, 1822 , subsequent designation by Glaessner (1929: 150).

DIAGNOSIS (after Devillez & Charbonnier 2019). — Fusiform intercalated plate; deep cervical groove, strongly inclined dorsally, joined to dorsal margin and to antennal groove; short gastro-orbital groove, originating as a slight median inflexion of the cervical groove; postcervical groove joined to branchiocardiac groove at carapace mid-height; branchiocardiac groove usually strongly inclined, joined to the posterior extremity of hepatic groove; hepatic groove concavo-convex, joined to cervical groove; inferior groove convex posteriorly, joined to hepatic groove and to ventral margin; v area usually inflated; cephalic region usually with an orbital row and with strong orbital and antennal spines; chelate P1-P3; P1 chelae without prominent spines and with an homogeneous ornamentation; P1 propodus compressed dorso-ventrally with narrow inner and outer margins, with a narrow dactylar bulge; P1 fingers usually longer than propodus, equal in length, progressively narrowing to their distal extremity; index wider than dactylus; P1 chelae (form I) with a short rectangular propodus, straight fingers, slightly longer than propodus; P1 chelae (form II) with an elongated subrectangular or trapezoidal propodus, bearing fingers quite longer than propodus, usually curved inward.