Multivariate analyses of skull morphology inform the taxonomy and evolution of geomyoid rodents

作     者：Lily A.Noftza Jonathan J.M.Calede 

作者机构：aBiology ProgramThe Ohio State University at Marion1459 Mount Vernon AvenueMarionOH 43302USA Department of EvolutionEcologyand Organismal BiologyThe Ohio State University318 W.12th Ave.ColumbusOH 43210USA. 

出 版 物：《Current Zoology》 (动物学报（英文版）)

年 卷 期：2023年第69卷第4期

页      面：456-474页

核心收录：

学科分类：0710[理学-生物学] 07[理学] 071002[理学-动物学] 

基　　金：This research was funded by a Paleontological Society Norman Newel Award a College of Arts and Sciences Regional Campus Research and Creative Activity Grant from the Ohio State University a research grant from the Ohio State University at Marion startup funds from the Ohio State University to JC and Summer Research Assistantship funds from the Ohio State University at Marion to LN.Some of the ideas for this project were developed while JC was supported by a Meaningful Inquiry grant from The Ohio State University library system 

主　　题：canalization convergent evolution Geomyidae Heteromyidae morphometrics phylomorphospace 

摘      要：Morphological analyses are critical to quantify phenotypic variation,identify taxa,inform phylogenetic relationships,and shed light on evolutionary *** work is particularly important in groups that display great morphological *** is the case in geomyoid rodents,a group that includes 2 of the most species-rich families of rodents in North America:the Geomyidae(pocket gophers)and the Heteromyidae(kangaroo rats,pocket mice,and their relatives).We assessed variation in skull morphology(including both shape and size)among geomyoids to test the hypothesis that there are statistically significant differences in skull measurements at the family,genus,and species *** sample includes 886 specimens representing all geomyoid genera and 39 *** used the geometric mean to compare size across *** used 14 measurements of the cranium and lower jaw normalized for size to compare shape among and within *** results show that skull measurements enable the distinction of geomyoids at the family,genus,and species *** is a larger amount of size variation within Geomyidae than within *** phylomorphospace analysis shows that the skull shape of the common ancestor of all geomyoids was more similar to the common ancestor of heteromyids than that of *** skulls display negative allometry whereas heteromyid skulls display positive *** heteromyids,dipodomyines,and non-dipodomyines show significantly different allometric *** analyses including fossils will be necessary to test our evolutionary hypotheses.