Ch 8 Attribution of Sex

anth exam 2

anterior view 1

pubic symphysis

anterior view 2

ischial tuberosity

anterior view 3

acetabulum

medial view 1

pubic tubercle, next to the pubic symphyses

medial view 2

greater sciatic notch

lateral view 1

ilium

lateral view 2

ischium

lateral view 3

pubis

adults vs subadults

• adults vary in size and shape of the pelvis, long bones and skull

• only way to sex subadults is through DNA, since they do not show variation

interpopulational differences

• know your group! range of male and female phenotypes in that population

  • do this by seriation

• ex: males of one population may resemble females of another population

seriation

lay out skeletal elements looking for range of variation and pattern within a population

• usually long bones

• ex: can show variation in height

Bones used to sex adults

• pelvis

• skull

• long bones

pelvic girdle. 2

subpubic angle

pelvic girdle 3

ventral arc

os coxa 1

preauricular sulcus

os coxa 2

greater sciatic notch

os coxa 3

ishiopubic ramus

M/F pelvic inlet/outlet

Male

• narrow

M/F pelvic inlet/outlet

Female

• wide

Pre-auricular sulcus

Male: can be present, but diminished

Female: present, more pronounced

ventral arc variation

which is which M/F?

top= female

bottom= male

M/F

top= male

bottom= female

M/F

top= male

bottom= female

M/F

top= male

bottom= female

MF

left= male

right=female

M/F

left= male

right= female

MF

left= male

right= female

MF

left= male

female = right

M/F ischiopubic ramus

male= left

female = right

MF

left= male

female = right

MF

female= top

male = bottom

ischiopubic ramus

wide and dull= male

sharp and narrow= female

preauricular sulcus variation

1, female

2, probably female

3, intermediate

4, male

Skull: overall robusticity

male= more, left

female= less, right

Glabellar region

temporal and nuchal lines

supra orbital ridges/margin

• females: sharper feel

• male: thicker, rounder

nuchal crest variation

male: rugged with hook

female: smooth, hook uncommon

mastoid process variation

Browridges/ supra orbital tours/ glabella

left: male

right: female

nuchal crest

left: male

right: female

MF

left: male, broad chin

right: narrow female