FIGURE 42 in Taxonomic and morphological revision of butterfly rays of the Gymnura micrura (Bloch & Schneider 1801) species complex, with the description of two new species (Myliobatiformes: Gymnuridae)

FIGURE 42. Synarcual cartilage (radiograph, dorsolateral view). A) Gymnura micrura (USNM 222622, 323 mm DW); B) Gymnura lessae, sp. nov. (SU 14336, 312 mm DW); C) Gymnura sereti, sp. nov. (holotype, USNM 193741, 383 mm DW). Abbreviations: assp, articular surface for scapular process; isv, intersynarcual vertebrae; lap, lateral anterior process; ls, lateral stay; mdc, medial crest; op, odontoid process; sc, suprasynarcual cartilage; snf, spinal nerve foramina; sp, scapular process; scp, scapulocoracoid. Arrows indicate the point where the synarcual base projects laterally and extends posteriorly.