Figure 1

Eyes of the holotype of Voulteryon parvulus Audo, Schweigert, Saint Martin & Charbonnier, 2014 (MNHN.F. A50708): (A,B) complete specimen, in dorsal view, under cross-polarized light (A) and interpretative line-drawing (B,C) virtual slice at the level of the eye (X-ray tomography data), arrows highlight the boundaries between the various internal structure of the eye; (D) dorsal surface of left eye showing ommatidial lenses arrays (SEM); (E) transition between hexagonal and quadrate arrays with imprints of ommatidial lenses (SEM); (F) dorsal surface of right eye showing imprints of ommatidial lenses arrays (SEM); (G) hexagonal array with imprints of ommatidial lenses (SEM); (H) quadrate array with imprints of ommatial lenses (SEM); (I) more abrupt transition between hexagonal (black asterisks) and quadrate (white asterisk) arrays with imprints of ommatidial lenses (SEM). Abbreviations: ala, anterolateral angle; b₁, hepatic groove; bc, branchial carina; bi, hepatic incision; c, cervical groove; cse, short expansion of carapace; d, gastro-orbital groove; e₁e, cervical groove; ei, cervical incision; fm, frontal margin; o, eye; P1, pereiopod 1 (=thoracopod 4); pc, postcervical carina; pla, posterolateral angle; pr, postrostral carina; s1-s6, pleonite 1–6. Scale bars: 5 mm (A,B) 0.5 mm (C,D,F) 50 µm (E,G–I). Images: Denis Audo (A,B, D–I) Miguel Garcia Sanz (C).