Covariable changes of septal spacing and conch shape during early ontogeny: a common characteristic between Perisphinctina and Ancyloceratina (Ammonoidea, Cephalopoda)

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2024-03-15 DOI:10.1017/jpa.2023.96

Yutaro Nishino, Keisuke Komazaki, Masaki Arai, Ai Hattori, Yuji Uoya, Takahiro Iida, Ryoji Wani

引用次数: 0

Abstract

We analyzed the ontogenetic trajectories of conch morphology and septal spacing between successive chambers in Cretaceous ammonoids (suborders Perisphinctina and Ancyloceratina) collected from southern India, Madagascar, and Japan. All examined species, except for the family Collignoniceratidae, exhibited similar characteristics during early ontogeny. The common ontogenetic trajectories of septal spacing show a cycle comprising an increase and a subsequent decrease in septal spacing during early ontogeny. The conch diameters at the end of the cycle were estimated to be 1–4 mm. The conch shape (aperture height and whorl expansion rate) covariably changed at this conch diameter. Such covariable changes are commonly recognized in the suborders Perisphinctina and Ancyloceratina. The similarity in the ontogenetic trajectories of conch morphology implies a closer phylogenetic relationship between these suborders compared to Lytoceratina or Phylloceratina.

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中隔间距和海螺形状在早期个体发育过程中的可变变化：Perisphinctina 和 Ancyloceratina（鲑形目，头足纲）之间的共同特征

我们分析了从印度南部、马达加斯加和日本采集的白垩纪芒鲷科（Perisphinctina 和 Ancyloceratina 亚目）海螺形态和连续腔室之间隔膜间距的个体发育轨迹。除了 Collignoniceratidae 科以外，所有被考察的物种在早期个体发育过程中都表现出相似的特征。中隔间距的共同个体发育轨迹显示，在早期个体发育过程中，中隔间距呈现先增大后减小的周期。周期末期的海螺直径估计为 1-4 毫米。海螺的形状（螺孔高度和螺轮膨胀率）在这一海螺直径时发生了变化。这种共变在 Perisphinctina 和 Ancyloceratina 亚目中很常见。与 Lytoceratina 或 Phylloceratina 相比，这些亚目海螺形态的发育轨迹相似，这意味着它们之间的系统发育关系更为密切。

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

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.