Evolutionary morphology of the hemolymph vascular system in hermit and king crabs (Crustacea: Decapoda: Anomala)
Evolutionary morphology of the hemolymph vascular system in hermit and king crabs (Crustacea: Decapoda: Anomala)
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DOI：
10.1002/jmor.20133
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发表时间：
2013-07-01
影响因子：
1.5
通讯作者：
Wirkner, Christian S.
中科院分区：
文献类型：
--
作者：
Keiler, Jonas;Richter, Stefan;Wirkner, Christian S.
寄居蟹在十足类甲壳动物的进化过程中转变为蟹状帝王蟹，这是一个显著的致癌或进化塑造成蟹状形态的案例。在这项研究中，我们专注于内部器官，如血淋巴血管系统和邻近解剖结构的几个最近寄居蟹（Paguridae）和帝王蟹（石蟹科）物种。两个类群的背侧头胸部动脉系统的形态有各种对应关系，特别是关于前主动脉、前外侧动脉和肝动脉。在胸膜，后主动脉在这两个类群显示近端分叉，并遵循一个不对称的过程。腹侧导管系统，另一方面，主要供应四肢，不同类群之间的显着差异，与pagurids显示的近形条件。石蛾科腹侧血管系统的格局受癌变过程中表皮结构形态变化的影响。这些变化之一是胸骨的加宽，这导致了胸骨内膜之间的空间加宽。此外，在Lithodidae的endophragmal骨骼的形态的变化导致的潜在的种内变异和种间变异的动脉分支模式的增加。J. Morphol.，2013. (c)2013 Wiley Periodicals，Inc.
The morphological transformation of hermit crabs into crab-like king crabs in the evolution of decapod crustaceans represents a remarkable case of carcinization or evolutionary shaping into a crab-like form. In this study, we focus on internal organs such as the hemolymph vascular system and adjacent anatomical structures of several Recent hermit crab (Paguridae) and king crab (Lithodidae) species. There are various correspondences in the morphology of the arterial systems in the dorsal cephalothorax of the two taxa, especially with regard to the anterior aorta, anterior lateral arteries, and hepatic arteries. In the pleon, the posterior aorta in both taxa displays a proximal bifurcation and follows an asymmetrical course. The ventral vessel system, on the other hand, which mainly supplies the limbs, differs significantly between the taxa, with pagurids displaying the plesiomorphic condition. The pattern of the ventral vessel system in Lithodidae is influenced by morphological transformations of integumental structures during carcinization. One of these transformations was the broadening of the sternites, which resulted in a widening of the space between the endosternites. In addition, changes in the morphology of the endophragmal skeleton in Lithodidae led to an increase in the potential for intraspecific variability and interspecific variation in the arterial branching pattern. J. Morphol., 2013. (c) 2013 Wiley Periodicals, Inc.