雷兽的异速生长、发育异时性与生物力学：修订一部进化经典著作

TITANOTHERE ALLOMETRY, HETEROCHRONY, AND BIOMECHANICS: REVISING AN EVOLUTIONARY CLASSIC.

作者信息

McKinney Michael L, Schoch Robert M

机构信息

Department of Geology and Geophysics, and Peabody Museum of Natural History, Yale University, New Haven, CT, 06511.

Division of Science, College of Basic Studies, Boston University, Boston, MA, 02215.

出版信息

Evolution. 1985 Nov;39(6):1352-1363. doi: 10.1111/j.1558-5646.1985.tb05700.x.

DOI:10.1111/j.1558-5646.1985.tb05700.x

PMID:28564257

Abstract

A reanalysis of Osborn's titanothere data indicates that extrapolative growth of a constant allometric relationship alone ("hypermorphosis") does not account for the trend toward body and horn size increase. Empirically, we also observe possible positive changes in the y-intercept ("predisplacement" or early onset of development), and possibly, changes in the slope ("acceleration/neoteny" or changes in growth rate) between the Oligocene and Eocene groups. Theoretically, these may be responses to more massive body shapes, perforce accompanying size increase, which increase the amount of force to which the horns were subjected.

摘要

对奥斯本的雷兽数据进行的重新分析表明，仅靠恒定异速生长关系的外推生长（“超形变”）并不能解释体型和角大小增加的趋势。从经验上看，我们还观察到渐新世和始新世群体之间可能存在y轴截距的正向变化（“预位移”或发育提前开始），以及斜率的可能变化（“加速/幼态持续”或生长速率变化）。从理论上讲，这些可能是对更大体型的反应，必然伴随着体型增大，这增加了角所承受的力量。