Eryma ornatum (Quenstedt, 1858) from the Callovian of Germany. A: lectotype GPIT/CU/00349 from Gammelshausen; B: original figure of Beurlen (1928: pl. 6, fig. 1) of one of the syntypes of Eryma calloviensis Oppel, 1861 from Ursulaberg hill near Reutlingen; C: original figure of Oppel (1862: pl. 5, fig. 2) of one of the syntypes of E. calloviensis from Oeschingen; D–F: specimen SMNS 70284/2 from Albstadt-Lautlingen: general view (D), details of the carapace (E), schema of the carapace (F). Scale bars: 1 cm. Abbreviations: a: branchiocardiac groove; as: antennal spine; b: antennal groove; b₁: hepatic groove; c: postcervical groove; d: gastro- orbital groove; e₁e: cervical groove; χ: attachment site of adductor testis muscle; ω: attachement site of mandibular muscle. Photographs: G. Schweigert (A), J. Devillez (D–F). Line drawing: J. Devillez.