Scoliodon taxandriae 4.jpg

Physodon fischeuri = Rhizoprionodon mâle. p. 61, pl. 16 (5-22): Scoliodon taxandriae = Rhizoprionodon femelle. Cappetta 1987, p. 126, fig. f-k p. 126.

This is from an Internet search. Apparently, Cappetta identified Physodon and Scoliodon as the male and female of Rhizoprionodon.