Aberrant Arm Branches in Pennsylvanian Crinoids from the Moscow Region

IF 0.7 4区地球科学 Q4 PALEONTOLOGY

Paleontological Journal Pub Date : 2024-02-13 DOI:10.1134/s0031030123110084

G. V. Mirantsev

引用次数: 0

Abstract

Middle–Upper Carboniferous (Pennsylvanian) crinoids with aberrant arm branches from the Moscow region are studied. It is shown that aberrations in the arm branches can be the result of mechanical damage during incorrect (augmentative) regeneration, as previously assumed, or the result of initial phenotype disorders. The latter cases show the evolutionary potential of the group. Consolidation of such aberrations in the phylogenies of certain groups of crinoids led to speciation and formation of new taxa.

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莫斯科地区宾夕法尼亚巨壳类动物的异常臂枝

摘要研究了莫斯科地区臂枝畸变的中上石炭世（宾夕法尼亚）板齿类动物。结果表明，臂枝畸变可能是不正确（增殖）再生过程中机械损伤的结果（如之前假设的那样），也可能是初始表型失调的结果。后一种情况显示了该类群的进化潜力。在某些类群的棘皮动物系统发育过程中，这种畸变的巩固导致了物种的分化和新类群的形成。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Paleontological Journal 地学-古生物学

CiteScore

1.20

自引率

33.30%

发文量

审稿时长

6-12 weeks

期刊介绍： Paleontological Journal (Paleontologicheskii zhurnal) is the principal Russian periodical in paleontology. The journal publishes original work on the anatomy, morphology, and taxonomy of fossil organisms, as well as their distribution, ecology, and origin. It also publishes studies on the evolution of organisms, ecosystems, and the biosphere and provides invaluable information on global biostratigraphy with an emphasis on Eastern Europe and Asia.