The anatomy of the king crab Hapalogaster mertensii Brandt, 1850 (Anomura: Paguroidea: Hapalogastridae): new insights into the evolutionary transformation of hermit crabs into king crabs
The anatomy of the king crab Hapalogaster mertensii Brandt, 1850 (Anomura: Paguroidea: Hapalogastridae): new insights into the evolutionary transformation of hermit crabs into king crabs
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帝王蟹 Hapalogaster mertensii Brandt 的解剖学，1850 年（Anomura：Paguroidea：Hapalogastridae）：对寄居蟹向帝王蟹进化转变的新见解
DOI：
10.1163/18759866-08402004
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发表时间：
2015
影响因子：
2.2
通讯作者：
C. S. Wirkner
中科院分区：
文献类型：
--
作者：
Jonas Keiler;S. Richter;C. S. Wirkner
帝王蟹是从类似寄居蟹的祖先进化而来的，这是十足类进化中最奇怪的事件之一。帝王蟹由两个分类群组成，石龙科和Hapalogastridae，虽然石龙科形成了各种解剖学研究的重点，但肢腹科的内部解剖从未被研究过，尽管这一组可能比石龙科代表了帝王蟹更古老的形态状况。为了更好地了解类寄居蟹向帝王蟹的进化过程，我们研究了中华绒螯蟹代表种的血淋巴血管系统和相关器官，并在这里提供了第一个与触腹蟹内部解剖有关的微型计算机断层扫描数据。我们的结果与现有的和新的关于扇形科和巨蟹科的数据进行了比较，并根据癌变或进化为蟹类栖息地的过程进行了讨论。Hapalogaster不仅在外部形态特征上，而且在某些内部解剖特征方面，一方面类似于页面动物，另一方面又类似于石龙科。在这方面和其他方面，Hapalogaster代表了一种进化的中间形式，连接了石龙科和石龙科。
The emergence of king crabs from a hermit crab-like ancestor is one of the most curious events in decapod evolution. King crabs comprise two taxa, Lithodidae and Hapalogastridae, and while lithodids have formed the focus of various anatomical studies, the internal anatomy of hapalogastrids has never been studied although this group might represent a more ancestral morphological condition within king crabs than lithodids do. To better understand the evolutionary transformation of pagurid-like hermit crabs into king crabs, we studied the hemolymph vascular system and associated organs of representatives of Hapalogaster and present here the first micro-computer tomography data pertaining to the internal anatomy of hapalogastrids. Our results for Hapalogastridae are compared with existing and new data on Paguridae and Lithodidae and are discussed in the light of the process of carcinization or evolutionary transformation into a crab-like habitus. Hapalogaster resembles both pagurids on the one hand and lithodids on the other, not only with regard to external morphological characters but also in terms of certain internal anatomical features. In this and other respects, Hapalogaster represents an evolutionary intermediate form that connects pagurids and lithodids.