A novel pharyngeal expansion mechanism in the yellow-spotted fanray, Platyrhina tangi (Elasmobranchii : Batoidea), with special reference to the function of the fifth ceratobranchial cartilage in batoids.
A novel pharyngeal expansion mechanism in the yellow-spotted fanray, Platyrhina tangi (Elasmobranchii : Batoidea), with special reference to the function of the fifth ceratobranchial cartilage in batoids.
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黄斑扇鳐Platyrhina tangi (Elasmobranchii : Batoidea)的一种新颖的咽部扩张机制，特别涉及鳐鱼第五角鳃软骨的功能。
DOI：
10.1007/s00435-012-0185-9
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发表时间：
2013
期刊：
影响因子：
1
通讯作者：
K.
中科院分区：
文献类型：
--
作者：
Tomita;T.;Toda;M.;Yamamoto;Y. ;Sato;K.;Uchida;S. ;and Nakaya;K.
鱼类在呼吸或捕捉猎物时的“咽部”扩张通常涉及舌骨弓的后腹回缩。然而，蝙蝠鱼（鳐、鳐、吉他鱼和锯鳐）的舌骨弓结构是独特的，它们如何扩张咽腔还知之甚少。为了研究黄点扇鳐呼吸时咽部扩张的机制，我们对咽部进行了解剖学和运动学研究。我们的研究显示，黄癍扇鳐和鲨鱼有不同的骨骼连接系统的咽部扩张。在咽部扩张的黄点扇鳐，舌骨杆和鳃器旋转腹周围的铰链关节之间的第五角鳃软骨和肩带。这种咽部扩张机制似乎在蝙蝠鱼中广泛存在，并且在软骨鱼类（鲨鱼，蝙蝠鱼和全头鱼）中是独特的。这种咽部扩张的机制可能是在早期的蝠类进化过程中形成的。
Expansion of the ‘pharynx’ during breathing or capturing prey in fishes generally involves posteroventral retraction of the hyoid arch. However, the hyoid arch structure of batoid fishes (skates, rays, guitarfishes, and sawfishes) is unique, and how they expand the pharyngeal cavity is poorly understood. To investigate the mechanism of pharyngeal expansion during breathing in the yellow-spotted fanray,Platyrhina tangi, we conducted anatomical and kinematic investigations of the pharyngeal region. Our study revealed that the yellow-spotted fanray and sharks have different skeletal linkage systems for pharyngeal expansion. During pharyngeal expansion in the yellow-spotted fanray, the hyoid bar and branchial apparatus rotate ventrally around the hinge joint between the fifth ceratobranchial cartilage and the pectoral girdle. This pharyngeal expansion mechanism appears to be widespread among batoid fishes and is unique among cartilaginous fishes (sharks, batoids, and holocephalans). Batoid fishes possibly developed this pharyngeal expansion mechanism during early batoid evolution.