古脊椎动物学报（中英文）2025，Vol.63Issue(4)：266-276,11.DOI:10.19615/j.cnki.2096-9899.250813
美国加州晚中新世食肉类扩散类群与其迁移路线及古环境的指示
Late Miocene immigrant carnivorans in California,USA highlight a coastal corridor for intercontinental dispersals
摘要
Abstract
The Neogene interval witnessed three major waves of intercontinental dispersals by carnivoran mammals,mainly migrating from Eurasia to North America but with rare occurrences going in the opposite direction(e.g.,Sthenictis,Leptarctus).The timing and composition of dispersers are thought to be controlled by filter-bridge mechanisms,but it is unclear what types of regional conditions promoted occasional dispersals outside of the three major waves.We study and report on new occurrences of small-bodied carnivorans from late Clarendonian-aged Black Hawk Ranch and Cuyama Valley fossil mammal assemblages in California.The relatively late occurrences of the mustelids Sthenictis and Hoplictis and the ailurid Alopecocyon in coastal regions of western North America suggest that nearshore dispersal corridors both facilitate and preserve faunal elements later than they might otherwise occur further inland.The availability of both marine-and terrestrially-derived food resources may be an important factor in allowing coastally dispersing taxa to be accommodated in those ecological communities compared to less heterogenous environments further inland.关键词
加利福尼亚/新生代/动物地理/哺乳动物/食肉目Key words
California/Cenozoic/paleobiogeography/mammals/Carnivora分类
生物学引用本文复制引用
曾志杰,王晓鸣..美国加州晚中新世食肉类扩散类群与其迁移路线及古环境的指示[J].古脊椎动物学报（中英文）,2025,63(4):266-276,11.基金项目
美国福布莱特奖学金资助. （）
