Groups
Animals
Crown-rump (mm)
Weight/g
Estimated age
1
1
9
0.05
14
2
9
0.056
14
2
1
10
0.085
14.5
2
10
0.111
14.5
3
10
0.111
14.5
4
10
0.12
14.5
5
10
0.132
14.5
6
11
0.146
15
3
1
16.5
0.513
16.5
2
17.5
0.519
17
3
18
0.59
17.5
4
18
0.599
17.5
5
18
0.638
17.5
4
1
20
1.09
18
2
21
0.871
18
3
22
0.929
18.5
5
1
25
1.09
19
2
27
1.309
19.5
6
1
28
1.787
20
2
30
2.154
20.5
Table 1:
Biometry and estimated ages according to Evans and Sack (1973) for Necromys. lasiurus (Rodentia, Cricetidae, Sigmodontinae) embryos and fetuses
