The relationship between head shape, head musculature and bite force in caecilians (Amphibia: Gymnophiona).
The relationship between head shape, head musculature and bite force in caecilians (Amphibia: Gymnophiona).
复制标题
蚓螈（两栖类：Gymnophiona）头部形状、头部肌肉组织和咬合力之间的关系。
DOI：
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发表时间：
2021
影响因子：
2.8
通讯作者：
A. Herrel
中科院分区：
文献类型：
--
作者：
Aurélien Lowie;B. De Kegel;M. Wilkinson;J. Measey;J. C. O’Reilly;N. Kley;Philippe Gaucher;J. Brecko;T. Kleinteich;D. Adriaens;A. Herrel
蚓螈是一种神秘的无肢两栖动物，除了少数例外，它们都至少有部分地穴居生活方式。尽管有人认为蚓螈的进化导致了坚固而紧凑的头骨，以适应其头先入穴的习惯，但迄今为止，头骨形状和穴居性能之间的关系尚未得到证实。然而，独特的双颌闭合机制和颞区的骨学变异表明头骨形状和进食机制之间存在潜在关系。在这里，我们探讨了头骨形状、头部肌肉组织和体内咬合力之间的关系。尽管咬合力和外部头部形状之间存在相关性，但无法检测到咬合力和头骨形状之间的关系。虽然我们的数据表明肌肉是咬合力变化的主要驱动因素，但头骨的形状受到咬合力产生需求以外的因素的限制。然而，颅骨和下颌骨之间存在强烈的协变。此外，颅骨和下颌骨的形状都与下颌肌肉结构共变。蚓螈在具有长关节后突的物种之间表现出梯度，该长关节突与大的羽状纤维m有关。舌骨间后部和具有短突但长且平行纤维的颌内收肌的物种。我们的结果证明了该颌系统的形式和功能之间关系的复杂性。为了充分了解蚓螈进食机制的演变，需要进一步研究诸如张口距离或下颌速度等因素。
Caecilians are enigmatic limbless amphibians that, with a few exceptions all have an at least partly burrowing lifestyle. Although it has been suggested that caecilian evolution resulted in sturdy and compact skulls as an adaptation to their head-first burrowing habits, no relationship between skull shape and burrowing performance has been demonstrated to date. However, the unique dual jaw-closing mechanism and the osteological variability of their temporal region suggest a potential relationship between skull shape and feeding mechanics. Here, we explored the relationships between skull shape, head musculature, and in vivo bite forces. Although there is a correlation between bite force and external head shape, no relationship between bite force and skull shape could be detected. Whereas our data suggest that muscles are the principal drivers of variation in bite force, the shape of the skull is constrained by factors other than demands for bite force generation. However, a strong covariation between the cranium and mandible exists. Moreover, both cranium and mandible shape covary with jaw muscle architecture. Caecilians show a gradient between species with a long retroarticular process associated with a large and pennate-fibered m. interhyoideus posterior and species with a short process but long and parallel-fibered jaw adductors. Our results demonstrate the complexity of the relationship between form and function of this jaw system. Further studies that focus on factors such as gape distance or jaw velocity will be needed in order to fully understand the evolution of feeding mechanics in caecilians.
影响因子：
2.4
作者：
Gignac PM;Kley NJ;Clarke JA;Colbert MW;Morhardt AC;Cerio D;Cost IN;Cox PG;Daza JD;Early CM;Echols MS;Henkelman RM;Herdina AN;Holliday CM;Li Z;Mahlow K;Merchant S;Müller J;Orsbon CP;Paluh DJ;Thies ML;Tsai HP;Witmer LM
通讯作者：
Witmer LM
中非蚓螈 Idiocranium russeli（两栖类：Gymnophiona：Indotyphlidae）的肌肉骨骼发育及其对蚓螈两栖类幼虫再进化的影响
影响因子：
1
作者：
Theska;Wilkinson;D. J. ;Müller
通讯作者：
Müller