Fig. 3: Opisthosomal appendicular anatomy of Setapedites abundantis gen. et sp. nov.
From: Lower Ordovician synziphosurine reveals early euchelicerate diversity and evolution
A, B MGL.107741 and interpretative drawing, holotype, articulated specimen in ventral view photographed under alcohol and with polarized filter. Composite line drawing from E and Supplementary Fig. 2A. (C, D) MGL.107741, Figs. 2E and 2F, opisthosomal appendages details, C with polarized filter and D under alcohol and polarized filter. Abbreviations: api, appendages insertion; oa1–7, opisthosomal appendages 1–7; ptp, pretelsonic process; px, proximal part of opisthosomal appendage; t1–11, tergites 1–11; t, telson. Chelicerae are highlighted in gray, endopods in blue, exopods in green, opisthosomal appendages in red, and the pretelsonic process in purple. Scale bars, (A, B) 1 mm; (C, D) 200 µm. See also Supplementary Figs. 2Afor full views of specimens MGL.1027741 polarized light photo.
