{"data":[{"source":"bio.acousti.ca","id":"58392.2","topic":"diagnostic","value":"Five putative sonic muscles were discovered between each of the first six pleural ribs of the male examined (Fig. 2). These five massive muscles (1\u20444obliquus superioris?) unite ribs 3 to 9 and were found at the level of the hypaxial musculature. Histological examination confirmed this tissue to be striated muscle tissue with elongate multinucleate cells with striations (Fig. 2). These extrinsic muscles were notably missing from the verified, mature female that was examined post-mortem. The pleural ribs were rostro-posteriorly flattened, canted, and found to sit directly adjacent and parallel to the lateral wall of the swimbladder. Further, the ribs were hinged to their respective vertebrae (3 to 8), allowing the ribs to pivot and deform the swimbladder. The muscle fibers of the tissue run obliquely between the ribs, originating on the posterior edge of the leading rib and inserting more distally on the anterior margin of following rib.\n\nManual traction of these ribs and muscles pulled ribs 2 to 6 medially and rostrally. No corresponding muscle tissue was found originating on the head and inserting on the ribs of either mature fish examined.","topic_link":"http:\/\/rs.tdwg.org\/ontology\/voc\/SPMInfoItems#DiagnosticDescription","info_url":"https:\/\/bio.acousti.ca\/node\/58392"}]}