北京大学学报（自然科学版）2024，Vol.60Issue(4)：626-638,13.DOI:10.13209/j.0479-8023.2024.040
山东寒武系崮山组褶颊虫类三叶虫Jiulongshania acalla个体发育过程中的头盖形态变化及其生态学意义
Cranidial Shape Variation during Ontogeny in Ptychopariid Trilobite Jiulongshania acalla from the Cambrian Gushan Formation of Shandong Province and Its Ecological Implication
摘要
Abstract
Based on a large number of cranidial specimens of Jiulongshania acalla Walcott,1905 from the Cambrian Gushan Formation at the Tangwangzhai section in Jinan City,Shandong Province,the traditional morphometric method and geometric morphometrics were used to measure and quantify the morphological features of the cranidium,revealing the cranidial shape variation during ontogeny.The results show that the growth rate of preglabellar field is the fastest,and the rate for the cranidial width is the slowest.The cranidial shape variation during ontogeny is mainly characterized by elongation of cranidium and gradual increase in the length of preglabellar field.It is proposed that the variation of trilobite exoskeletal morphology,particularly the cephalon,might be related to the feeding mode of trilobite.The results may suggest that the feeding habits of J.acalla might have changed during development.关键词
Jiulongshania acalla/头盖形态变化/寒武系/崮山组/山东Key words
Jiulongshania acalla/cranidial shape variation/Cambrian/Gushan Formation/Shandong引用本文复制引用
秦树健,董琳..山东寒武系崮山组褶颊虫类三叶虫Jiulongshania acalla个体发育过程中的头盖形态变化及其生态学意义[J].北京大学学报（自然科学版）,2024,60(4):626-638,13.基金项目
国家自然科学基金(41402025)资助 （41402025）
