Quasicalathus, light microscopic images of Q. elpis Ortuño & Arillo, 2009 (18–20.) and Q. agonicollis sp. nov. (21–24.). 18. General view of the amber piece “MAIG 76” (only that part of the large amber piece bearing the Quasicalathus fossil is shown; the fossil is widely covered by milky coating); 19. General view of the two fragments of specimen “GZG 16185”; the left one bears only the negative imprint of the left elytra on the inclusion wall; 20. Right anterior part of body of specimen “GZG 16185” showing part of head, pronotum and humerus; 21, 22. General view of the amber piece “GZG 16188” (21. With fossil in dorsal view; 22. In ventral view); 23. Anterior part of specimen “GZG 16188”; 24. Head of specimen “GZG 16188”. Abbreviations: a1–a6 – antennomeres 1–6; as – anterior supraorbital seta; bs – pronotal laterobasal seta; ms – pronotal lateral seta; ps – posterior supraorbital seta.