An Unusual Body Plan in Bilateria: a Fractal Branching Body

IF 0.7 4区地球科学 Q4 PALEONTOLOGY

Paleontological Journal Pub Date : 2024-02-13 DOI:10.1134/s0031030123110060

V. V. Isaeva

引用次数: 0

Abstract

A branching body pattern with one head and many “tails”, unique for recent Bilateria, was found in three species of endosymbiotic polychaetes of the family Syllidae (McIntosh, 1879; Glasby et al., 2012; Aguado et al., 2015, 2022). Among recent echinoderms, many species of crinoids, brittle stars, and holothurians have dendriform branching bodies with many distal, posterior ends of their arms, rays, and tentacles, which include the typical axial ambulacral complex. Multiple bifurcations of the posterior (distal) parts create fractal branching of the body pattern, representing a macroevolutionary transformation of the ancestral body plan in Bilateria.

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双尾目动物的不寻常身体结构：分形分支体

摘要在鞘翅目多毛类的三种内共生多毛类中发现了一种在近代双鞭毛目动物中独一无二的一头多 "尾 "的分支体模式（McIntosh，1879；Glasby等人，2012；Aguado等人，2015，2022）。在近代棘皮动物中，许多种类的棘皮动物、脆星和全棘皮动物都有树枝状的分支体，其臂、射线和触手有许多远端、后端，其中包括典型的轴伏复合体。后部（远端）的多个分叉形成了分形的身体形态分支，代表了双尾目动物祖先身体形态的宏观进化转变。

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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.