Fig. 42 in Freshwater Stingrays Of The Green River Formation Of Wyoming (Early Eocene), With The Description Of A New Genus And Species And An Analysis Of Its Phylogenetic Relationships (Chondrichthyes: Myliobatiformes)

Fig. 42. Articulation between mesopterygium and pectoral radials (character 20 in phylogenetic analysis) of representative extant stingray taxa in dorsoventral view. A. Potamotrygon leopoldi (UERJ 719), right side (inverted), ventral view. B. Dasyatis margarita (AMNH 41512), left side (inverted), dorsal view. C. Urolophus lobatus (CSIRO P8197), right side (inverted), ventral view. D. Trygonoptera testacea (USNM 39993), right side (inverted), ventral view. Arrows depicts sinuous margin of mesopterygium where it articulates to radials in panels C and D. Figures are not to scale. Anterior to top.