The Order Adelospondyli: Carboniferous lepospondyl amphibians
The Order Adelospondyli: Carboniferous lepospondyl amphibians
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Adelospondyli 目：石炭纪 lepospondyl 两栖类
DOI：
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发表时间：
1991
期刊：
影响因子：
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通讯作者：
R. Carroll
中科院分区：
文献类型：
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作者：
S. M. Andrews;R. Carroll
摘要Adelospondyli目是爱丁堡地区石炭纪的一个孤立的两栖动物类群，被重新描述并与其他早期四足动物区分开来。虽然属和种的系统分类学不能令人满意，但这群似乎是单系的，因为就目前所知，它们都符合一个单一的总体结构图。有一个完整的头骨顶部，以独特的方式减少了骨骼的补充，一个高度特征性的边缘齿系，一个巨大的舌骨装置，至少70个全脊椎的躯干椎骨，和（像其他一些下石炭纪四足动物）肩部区域有一个沉重的真皮带，但没有骨化的四肢或软骨内带的痕迹。Adelogyrinids与其他古生代两栖动物没有特别的亲缘关系：它们类似于微龙、溶蜥、囊足类和蜜腺类的脊椎特征可能在早期四足动物中进化了不止一次，而与异齿类共有的肩带和神经弓特征可能是原始的。因此，阿德利奥林类动物说明了在早期四足动物之间建立相互关系的更普遍的问题。他们的生活方式被讨论。
Abstract The Order Adelospondyli, an isolated group of amphibians from the Carboniferous of the Edinburgh area, is redescribed and distinguished from other early tetrapods. Although systematics of genera and species is unsatisfactory, the group seems monophyletic, since as far as they are known, all conform to a single overall structural plan. There is an entire skull roof with a reduced complement of bones in an unique pattern, a highly characteristic marginal dentition, a massive hyoid apparatus, at least 70 holospondylous trunk vertebrae, and (like some other Lower Carboniferous tetrapods) a shoulder region with a heavy dermal girdle but no trace of ossified limbs or endochondral girdle. Adelogyrinids show no special affinity with other Palaeozoic amphibians: the vertebral characters in which they resemble microsaurs, lysorophids, aïstopods, and nectrideans may have evolved more than once among early tetrapods, and the shoulder girdle and neural arch characters shared with labyrinthodonts are probably primitive. The adelogyrinids thus illustrate the more general problems of establishing interrelationships among early tetrapods. Their way of life is discussed.