enamelthickness: Enamel thickness and other molar data for hominoids.

In ryanraaum/bioanthdatasets: bioanthdatasets - real bioanth data examples

Description

A dataset containing enamel thickness, enamel area, and other data (see below) for 195 specimens representing 13 species of hominoids.

Usage

data(enamelthickness)

Format

A data frame with 195 rows and 9 variables:

accession

specimen identifier

taxon

hominoid species

tooth

mandibular molar M1, M2, or M3

enamel_area

enamel area, in mm squared

dentine_area

dentine area, in mm squared

edj_length

enamel-dentine junction length, in mm

bcd

bi-cervical diameter, in mm

aet

average enamel thickness, in mm

ret

relative enamel thickness

Source

Skinner MM, Alemseged Z, Gaunitz C, Hublin J-J. 2015. Enamel thickness trends in Plio-Pleistocene hominin mandibular molars. Journal of Human Evolution 85:35-45. http://dx.doi.org/10.1016/j.jhevol.2015.03.012

The data were extracted from the supplementary material. The following modifications were made:

• citation and basis for tooth identification columns dropped

• consolidated LM1 and RM1 into just M1, and the same for M2 and M3; none of the analyses in the paper itself differentiate between right and left

• fixed an apparent error in the values for bcd, aet, and ret for the specimens of unknown taxonomic attribution (column values were rotated)

Examples

boxplot(aet ~ taxon, data=enamelthickness, 
                     las=2, cex.axis=0.65)

ryanraaum/bioanthdatasets documentation built on May 14, 2019, 9 a.m.