Eryma major Oppel, 1861

(Fig. 7 A-C)

Eryma major Oppel, 1861: 358; 1862: 37, pl. 8, fig. 3. — Schweitzer et al. 2010: 24. — Devillez et al. 2016: 524.

Erymastacus major – Schweigert et al. 2000: 8, pl. 3, figs 4-5. — Dietl & Schweigert 2001: 54, fig. 88. — Schweigert & Garassino 2003: 178, fig. 2B. — Hyžný et al. 2015: 375, 376.

TYPE MATERIAL. — Holotype SMNS 3682. TYPE LOCALITY. — Nusplingen, Baden-Württemberg, Germany. TYPE AGE. — Kimmeridgian.

DESCRIPTION

Thoracic appendages

Chelate P1; elongated P1 propodus, subrectangular, dorsoventrally compressed, with a longitudinal bulge on ventral surface; narrow dactylar bulge, slightly bulged, not posteriorly delimited by a groove; slender, elongated fingers, almost straight; occlusal margins with wide conical teeth, regularly spaced; P1 carpus short, subtriangular; elongated P1 merus.

Ornamentation

P1 propodus and fingers densely covered by fine tubercles.

DISCUSSION This species is only known by some isolated P1, mainly from the lithographic limestones of southern Germany. The subrectangular, dorso-ventrally compressed propodus with long and narrowing fingers justifies the assignation to Eryma . Eryma major is only known by some fragments of P1, so the comparisons are restricted to the species for which the P1 are also known ( E. georgeii, E. jungostrix, E. lerasi, E. mandelslohi, E. modestiforme, E. quadriverrucatum, E. veltheimii, E. ventrosum, E. westphali). The straight fingers of E. major are clearly distinct from the curved ones of E. georgeii, E. lerasi, E. mandelslohi, E. veltheimii, E.ventrosum, and E.westphali . The propodus of E. major is also shorter than that of E. veltheimii and E. westphali . The propodus of E. major is covered by tubercles while that of E. veltheimii and E. westphali is smooth and that of E. modestiforme is covered by small depressions.