在不同的爬行动物种类中,膝盖组织的多样性和演变
Romel S Sanchez1,2,3, Adriana Manzano4,5, María de Los Ángeles Lazarte6
1Instituto Superior de Investigaciones Biológicas (INSIBIO), CONICET and Instituto de Biología "Dr. Francisco D. Barbieri", Facultad de Bioquímica, Química y Farmacia, Universidad Nacional de Tucumán, San Miguel de Tucumán, Argentina.
Journal of anatomy
|September 10, 2025
概括
爬行动物膝盖表现出多样化的发育模式和解剖特征,在爬行动物中产生单一的骨,膝盖结构的演变趋同. 这项研究探讨了不同爬行动物血统的膝盖发育.
科学领域:
- 比较解剖学的比较解剖学.
- 发育生物学是发展生物学.
- 进化形态学的进化形态学
背景情况:
- 膝关节对于四足动物的运动至关重要,但其在非模型爬行动物中的发展和多样性尚不清楚.
- 了解爬行动物膝盖的发育,可以了解四足动物四肢的演变.
研究的目的:
- 调查代表性爬行动物血统中的膝关节发育和形态.
- 为了比较不同爬行动物群体的发育模式和解剖学变异.
- 重建骨和其他膝盖结构的进化历史.
主要方法:
- 在Phrynops hilarii (Testudines),Caiman latirostris (Crocodylia) 和Columba livia (Aves) 的发育阶段的组织学分析.
- 成人膝盖形态的比较在状鱼物种Cercosaura parkerii和Hemidactylus mabouia.
- 骨化,阴囊形成,软骨组成和芝麻状物存在的文件.
- 对于关键膝关节特征的祖先状态重建.
主要成果:
- 所有研究的种群表现出延迟的体骨化和早期的带/阴茎分化.
- 观察到阴茎形状,组织组成,骨平原和芝麻状物存在的显著变化.
- Phrynops hilarii 没有骨,但有骨和骨;Caiman latirostris 和Columba livia 显示出不同的骨结构.
- 科伦巴·利维亚表现出更薄的软骨和更窄的关节间区域.
- 祖先状态重建表明爬行动物中单一的骨起源和多个融合实例.
结论:
- 爬行动物膝盖的发育显示了既保留的特征,又显著的多样性.
- 骨可能起源于爬行动物,随后发生了膝盖结构的融合进化.
- 这项研究为了解四足动物四肢关节的演变提供了一个发展框架.
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