FIGURES 8–11. Prosternum with variously developed basal process and canal. 8, M in Two new species of Optatus Pascoe and Macroptatus Heller (Coleoptera, Curculionidae, Baridinae), with a reappraisal of generic characters

FIGURES 8–11. Prosternum with variously developed basal process and canal. 8, M. championi; 9, M. deppens; 10, O. palmaris; 11, O. fasciculosus.Published as part of Prena, Jens, 2023, Two new species of Optatus Pascoe and Macroptatus Heller (Coleoptera, Curculionidae, Baridinae), with a reappraisal of generic characters, pp. 377-386 in Zootaxa 5244 (4) on page 382, DOI: 10.11646/zootaxa.5244.4.4, http://zenodo.org/record/766361