Lumbrineriopsis dulcis sp. nov. A anterior end, dorsal view (ZUEC-POL 21515) B anterior end, ventral view (ZUEC-POL 21515) C mandibles (adult), dorsal view (ZUEC-POL 22897) D right mandible (juvenile), ventral view (ZUEC-POL 22900) E jaw apparatus, dorsal view (ZUEC-POL 21524) F MII, detailed view (ZUEC-POL 21524) G MIII, detailed view (ZUEC-POL 21524) H MIV detailed view (ZUEC-POL 21524). Arrows of C, D teeth of mandibles; arrows of G teeth of MIII. Scale bars: 125 µm (A, B); 31.25 µm (C); 25 µm (D); 31.25 µm (E–G); 12.5 µm (H).