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The structural details of some muscles, connective tissue elements, and bone structures of the visceral apparatus in the ember parrotfish Scarus rubroviolaceus were studied. In the lower jaw, a lock mechanism has been found that limits the degree of adduction of the anguloarticulare relative to the suspensorium. The impact of numerous subdivisions of m. adductor mandibulae on the elements of the front jaws in the process of the fish's mouth closing is discussed. [ABSTRACT FROM AUTHOR]

The structural details of some muscles, ligaments, aponeurotic structures, and osteological features of the pharyngeal jaw apparatus of ember parrotfish Scarus rubroviolaceus were studied. During the preparation, the evidence of the presence of a palatal organ in this species, which is convergently similar to that of benthic fish species of Cyprinidae and Catostomidae, has been found. The indirect effect of contraction of m. geniohyoideus and m. sternohyoideus on the operation of the pharyngeal jaw is discussed. Based on the results of anatomy and analysis of the literature, the interpretation of previously obtained morphofunctional data characterizing the apparatus of the pharyngeal jaws of parrotfish (Scaridae) is corrected using S. rubroviolaceus as an example. [ABSTRACT FROM AUTHOR]