古脊椎动物学报（中英文）2026，Vol.64Issue(3)：221-237,17.DOI:10.19615/j.cnki.2096-9899.250708
早白垩世燕子沟辽角龙(恐龙类:新角龙类)的骨组织学研究
Osteohistology on Liaoceratops yanzigouensis(Dinosauria:Neoceratopsia)from the Early Cretaceous Jehol Biota
摘要
Abstract
Ceratopsia is among the most extensively studied groups of dinosaurs.However,research on ceratopsian osteohistology remains extremely limited,leaving significant gaps in our understanding of their growth rates,growth patterns,and life histories.This study presents a detailed histological analysis of the fibulae and ribs from two Liaoceratops yanzigouensis specimens(IVPP V18616 and V17910).V18616 was identified as a juvenile,estimated to be less than one year old,while V17910 was classified as a subadult,at least three years of age.The results indicate that Liaoceratops experienced rapid growth during its juvenile stage,with fibrolamellar bone dominating the cortical bone.By the subadult stage,the growth rate had gradually slowed.This study also highlights the importance of standardized sampling protocols,as evidenced by the rib sections.The feasibility of conducting comparative studies is constrained by the non-standardized sampling locations.The presence of LAGs(Lines of Arrested Growth)in V17910 suggests that Liaoceratops had a cyclical,interrupted growth pattern.In contrast to the continuous growth seen in chasmosaurinae,early-diverging neoceratopsians may have predominantly experienced cyclic growth interruptions.关键词
骨组织学/角龙类/辽角龙/生长模式/周期性生长标志Key words
osteohistology/Ceratopsia/Liaoceratops/growth pattern/cyclical growth marks分类
生物科学引用本文复制引用
郭特,贺一鸣,赵祺..早白垩世燕子沟辽角龙(恐龙类:新角龙类)的骨组织学研究[J].古脊椎动物学报（中英文）,2026,64(3):221-237,17.基金项目
国家自然科学基金(批准号:42072008,42272020)资助. We thank Zhu Yuxia(IVPP)for helping to make the thin sections,and Hao Mingze(IVPP)for his beneficial suggestions and discussions.This study was supported by the National Natural Science Foundation of China(Grant Nos.42072008,42272020). （批准号:42072008,42272020）
