Fossil record of echinoderm regeneration with special regard to crinoids
Fossil record of echinoderm regeneration with special regard to crinoids
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棘皮动物再生的化石记录，特别是海百合
DOI：
10.1002/jemt.1186
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发表时间：
2001
影响因子：
2.5
通讯作者：
T. Oji
中科院分区：
文献类型：
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作者：
T. Oji
本文综述了棘皮动物化石骨骼再生的研究进展。在各种棘皮动物化石的再生中，海百合的再生最常见，已有许多例子报道。中生代和新生代海百合，亚类关节，其特点是占主导地位的肌肉关节的武器，他们只有少量的韧带关节的局部位置，专门为自切。肌肉关节的优势是最明显的家庭Isocrinidae和comatulid（无柄）海百合。大多数海百合的再生臂都是从这个韧带关节开始的。与此相反，大多数古生代海百合有更多的韧带关节和更少的肌肉关节在他们的武器比中生代到现代海百合。古生代海百合的韧带关节可能不能自切。化石和最近发现的海百合提供了关于身体部分丧失后再生的程度和方式的数据。若保留牙冠基底部的背口神经中枢，则可再生整个萼和臂。相反，如果失去了背口神经中枢，只保留了柄，则某些骨骼部分只能不完整和不规则地生成。这种不完美的再生更好地称为过度生长。Microsc. Res. Tech. 55：397-402，2001.© 2001 Wiley利斯公司
Regeneration of skeletal parts of fossil echinoderms is reviewed. Among regenerations of various fossil echinoderms, those of crinoids are most common and many examples have been reported. Mesozoic and Cenozoic crinoids, the subclass Articulata, are characterized by the dominance of muscular articulations in the arms and they have only a small number of ligamentary articulations in localized positions that are specialized for autotomy. The dominance of muscular articulations is most conspicuous in the family Isocrinidae and comatulid (stalkless) crinoids. Most of the regenerated arms of articulate crinoids start on this ligamentary articulation. In contrast, most Paleozoic crinoids have many more ligamentary articulations and fewer muscular articulations in their arms than the Mesozoic to Recent crinoids. The ligamentary articulations of Paleozoic crinoids were probably not capable of autotomy. Fossil and recent stalked crinoids provide data on the degree and style of regeneration after loss of body parts. If the aboral nerve center in the basal part of crown is retained, the entire calyx and arms can be regenerated. In contrast, if the aboral nerve center is lost and only the stalk is preserved, some skeletal parts can only be generated imperfectly and irregularly. This type of imperfect regeneration is better termed as overgrowth. Microsc. Res. Tech. 55:397–402, 2001. © 2001 Wiley‐Liss, Inc.
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