FIGURE 5. Pronota and elytral shoulder. A in A review of the Bembidion (Odontium) aenulum subgroup (Coleoptera: Carabidae), with description of a new species

FIGURE 5. Pronota and elytral shoulder. A: Bembidion aenulum, DRM voucher V100515, Iowa: Des Moines River near Stratford. B: Comparison of shoulder area and hind pronotal angle of B. aenulum and B. paraenulum. Note how the humeral sulcus is nearly parallel to the hind margin of the pronotum in B. aenulum, whereas in B. paraenulum the sulcus diverges from the pronotal hind margin toward the middle of the beetle. This also means that mesal end of the sulcus points more posteriad in B. paraenulum than B. aenulum. C: B. paraenulum holotype, Virginia: Big Otter River. D: B. paraenulum, DRM voucher V100126, Mississippi: Perry Co., DeSoto N.F., Black Creek at Fairley Bridge Landing. All photographs to same scale; scale bar is 0.5 mm.