陕西嵌齿象与同心铲齿象同物异名考及铲齿象属一新种
Attributing"Gomphotherium shensiense"to Platybelodon tongxinensis,and a new species of Platybelodon from the latest Middle Miocene
摘要
Abstract
Platybelodon is the predominant proboscidean of northern China's Middle Miocene.However,the cranial and cheek tooth morphologies are not clearly diagnosed.In particular,the differential diagnoses between Platybelodon and Gomphotherium have not been comprehensively examined.Here we restudied the cranium previously identified as Gomphotherium shensiense.The upper tusks lack an enamel band,the rostrum is long and narrow,the facial part is rostrally positioned,and a large"prenasal slope"is present.These characters are distinct from those of any species of Gomphotherium,but fit well with some primitive species of Platybelodon,i.e.,P.tongxinensis and P.danovi.The molars are also close to the type specimen of P.tongxinensis in the tetralophodont M3 with mesiodistally wide interlophs,curved outline,and a tendency of cementodonty.In this article,we synonymized Gomphotherium shensiense with P.tongxinensis.Moreover,we recognized a new species,Platybelodon tetralophus,from the P.grangeri material collected by the AMNH expedition in Tunggur region.Platybelodon tetralophus differs from P.grangeri and the other species in the tetralophodont M2 and m2,representing the most derived species within Platybelodon.It has only occurred in the uppermost horizon of the Tunggur Formation,i.e.,the Tamuqin Fauna(Platybelodon Quarry and Wolf Camp Quarry of AMHN).This work is a comprehensive amending of the genus Platybelodon.关键词
铲齿象属/嵌齿象属/生物地层/生物年代Key words
Platybelodon/Gomphotherium/biostratigraphy/biochronology分类
生物科学引用本文复制引用
王世骐,李春晓..陕西嵌齿象与同心铲齿象同物异名考及铲齿象属一新种[J].古脊椎动物学报,2022,60(2):117-133,17.基金项目
中国科学院战略性先导科技专项(编号:XDB26000000,XDA20070203,XDA20070301)、第二次青藏高原综合科学考察研究(编号:2019QZKK0705)、国家自然科学基金(批准号:41872001)、中国科学院前沿科学重点研究项目(编号:QYZDY-SSW-DQC022)和科技部基础专项课题(编号:DD20190009)资助.We thank Z.-X.Qiu,IVPP,for helping with the Russian paper of Platybelodon danovi.We thank J.Meng,AMNH,for access to the Platybelodon sample in the AMNH.We thank the reviewers for their improvement of the manuscript.This work was supported by the Strategic Priority Research Program of the Chinese Academy of Sciences(XDB26000000,XDA20070203,XDA20070301),the Second Comprehensive Scientific Expedition on the Tibetan Plateau(2019QZKK0705),the National Natural Science Foundation of China(41872001),the Chinese Academy of Sciences(QYZDY-SSW-DQC022),and the Special Research Program of Basic Science and Technology of the Ministry of Science and Technology(DD20190009). （编号:XDB26000000,XDA20070203,XDA20070301）
