Figs 18–21 in Review of the whirligig beetle genus Gyrinus of Venezuela (Coleoptera: Gyrinidae)

Figs 18–21. SEM images of elytral interval reticulation and strial punctures. 18–19 – Gyrinus gibbus Aubé, 1838. 18 – intervals II and III, striae I–III. 19 – intervals IX and X, striae VIII–X. 20–21 – G. ovatus Aubé, 1838. 20 – intervals II and III, striae I–III. 21 – intervals IX and X, striae VIII–X.