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Morphogenesis Rate Variability and Modularity of Development in Jurassic Ammonites of the Genus Arcticoceras Spath, 1924
Paleontological Journal ( IF 0.6 ) Pub Date : 2020-03-18 , DOI: 10.1134/s0031030120010050
D. N. Kiselev

Abstract

The high variability of ammonites is largely due to the diversity of combinations of individual heterochronies (bradimorphy, tachymorphy, bradygeronty, and tachygeronty) and the modularity of development. Using the genus Arcticoceras as an example, it was shown that heterochronies of various directions can be combined in any number of characters, and individual heterochronies differ from phylogenetic ones by their smaller range, and a larger number of combinations. The study of such combinations allowed intraspecific morphs to be recognized, and available Arcticoceras species to be revised. During the Early and Middle Bathonian, the family Cardioceratidae evolved through a series of paedomorphosis, and after the appearance of Cadoceratinae, through accelerations.


中文翻译:

形态发生率的变异性和发育的模块,在1924年Arcticoceras Spath属的侏罗纪亚Am。

摘要

炸药的高变异性很大程度上归因于各个异时相(杂种优势,速殖子形态,缓殖子和速殖子)的组合的多样性和发展的模块化。以大叶弧菌属为例,表明可以将任意方向的异时组合成任意数量的字符,各个异时与系统发育的异同时间范围较小,组合数量较大。对这种组合的研究使得可以识别种内形态,并修改了可用的Arcticoceras种类。在巴东时期的早期和中期,心脏科(Caioceratidae)通过一系列的pa变而进化,并且在Cadoceratinae出现之后,通过加速而进化。
更新日期:2020-03-18
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