Cranial muscle homology across modern gnathostomes
Cranial muscle homology across modern gnathostomes
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DOI：
10.1111/j.1095-8312.2008.00963.x
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发表时间：
2008-05-01
影响因子：
1.9
通讯作者：
Anderson, Philip S. L.
中科院分区：
文献类型：
--
作者：
Anderson, Philip S. L.
不精确的使用术语可能会导致混乱时，试图比较颅肌肉之间的分类群从不同的高阶组。本研究的目的是提出假设的肌肉同源性类群从四个现代颚口类：Actinopterii（Amia calva），Sarcopterii（Latimeria chaluminus），板鳃亚纲（Squalus acanthias，Chlamydoselachus anguineus），和Holocephali（Hydrolagus colliei）。肌肉同源性假设的基础上采取的拓扑数据从解剖学文献和补充Hydrolagus colliei的新观察。假设的肌肉群进行测试一致性对公认的gnathostome发育。从这些数据中，确定了八个肌肉群，这些肌肉群在所有检查的类群中是明确同源的。四个以上的肌肉群被发现是同源的，在大多数类群。十二个肌群被假设为所有颚口的基础。Hydrolagus中的一块肌肉以前被称为颏舌骨肌和舌骨间肌，在这里被重新命名为“下颌舌骨肌”，以反映其无定形条件。所有组中的喙下颌肌的存在支持了这一假设，即在gnathostomes的基颌凹陷系统不与舌骨运动，但独立地由这块肌肉操作。这项研究还为化石群（Placodermi）的肌肉重建提供了新的见解。(C)2008年，伦敦林奈学会。
Imprecise usage of terminology can lead to confusion when trying to compare cranial musculature between taxa from different higher-order groups. The present study aimed to present hypotheses of muscle homology between taxa from four modern gnathostome groups: Actinopterygii (Amia calva), Sarcopterygii (Latimeria chalumnae), Elasmobranchii (Squalus acanthias, Chlamydoselachus anguineus), and Holocephali (Hydrolagus colliei). Muscle homologies are hypothesized based on topological data taken from the anatomical literature and supplemented by new observations of Hydrolagus colliei. Hypothesized muscle groups are tested for congruence against accepted gnathostome phylogeny. From these data, eight muscle groups are identified that are unambiguously homologous across all taxa examined. Four more muscle groups are found to be homologous across a majority of the taxa. Twelve muscle groups are hypothesized to be basal across all gnathostomes. A muscle in Hydrolagus previously called both a geniohyoideus and interhyoideus is here renamed 'mandibulohyoideus' to reflect its apomorphic condition. The presence of coracomandibular muscles in all groups supports the hypothesis that basal jaw depression systems in gnathostomes were not linked to hyoid movement, but independently operated by this muscle. The study also offers new insight into muscle reconstruction in fossil groups (Placodermi). (C) 2008 The Linnean Society of London.