FIGURES 1–8. Meridialaris spina imago. 1, male imago forewing. 2, male imago hind wing. 3 in Description of the imago of Meridialaris spina Pescador & Peters 1987 (Insecta: Ephemeroptera)

FIGURES 1–8. Meridialaris spina imago. 1, male imago forewing. 2, male imago hind wing. 3 male imago, abdominal segments III–VII, dorsal view. 4, male imago, abdominal segments III–V, lateral view. 5, female imago, abdominal segments III–V, dorsal view. 6, penes, dorsal view. 7, penes, lateral view. 8, genitalia, ventral view.