TABLE 1. Temporal data and taxonomic parameters of the study. Time units and absolute ages extracted from Gradstein and Ogg (2004). The limits and the duration (∆t) of each interval are shown in million years. N0, number of initial taxa; Nt, number of taxa with record in the subsequent interval; O, number of originated taxa; E, number of extinguished taxa; T, number of total taxa; St, number of singleton taxa; Nr, number of range-through taxa; Ne, number of extinguished taxa by discounting the singletons; Nf, number of originated taxa by discounting the singletons.
|
Temporal setting |
Taxonomic counts |
||||||||||||
|
Time unit |
Abbreviation |
Lower |
Upper |
?t |
N0 |
Nt |
O |
E |
T |
St |
Nr |
Ne |
Nf |
|
Late Silurian |
US |
428.2 |
416.0 |
12.2 |
1 |
2 |
2 |
0 |
3 |
0 |
/ |
0 |
2 |
|
Early Devonian |
LD |
416.0 |
397.5 |
18.5 |
2 |
4 |
4 |
2 |
6 |
1 |
1 |
1 |
3 |
|
Middle Devonian |
MD |
397.5 |
385.3 |
12.2 |
4 |
11 |
8 |
1 |
12 |
0 |
3 |
1 |
8 |
|
Late Devonian |
UD |
385.3 |
359.2 |
26.1 |
11 |
10 |
7 |
8 |
18 |
4 |
7 |
4 |
3 |
|
Mississippian |
LCa |
359.2 |
318.1 |
41.1 |
10 |
21 |
21 |
10 |
31 |
6 |
6 |
4 |
15 |
|
Pennsylvnian |
UCa |
318.1 |
299.0 |
19.1 |
21 |
27 |
25 |
19 |
46 |
10 |
12 |
9 |
15 |
|
Early Permian |
LPe |
299.0 |
270.6 |
28.4 |
27 |
20 |
7 |
14 |
34 |
2 |
15 |
12 |
5 |
|
Late Permian |
UPe |
270.6 |
251.0 |
19.6 |
20 |
10 |
7 |
17 |
27 |
3 |
6 |
14 |
4 |
|
Early Triassic |
LT |
251.0 |
245.0 |
6.0 |
10 |
13 |
5 |
2 |
15 |
2 |
10 |
0 |
3 |
|
Middle Triassic |
MT |
245.0 |
228.0 |
17.0 |
13 |
13 |
0 |
0 |
13 |
0 |
13 |
0 |
0 |
|
Late Triassic |
UT |
228.0 |
199.6 |
28.4 |
13 |
25 |
15 |
3 |
28 |
1 |
11 |
2 |
14 |
|
Early Jurassic |
LJ |
199.6 |
175.6 |
24.0 |
25 |
28 |
3 |
0 |
28 |
0 |
25 |
0 |
3 |
|
Middle Jurassic |
MJ |
175.6 |
161.2 |
14.4 |
28 |
31 |
4 |
1 |
32 |
0 |
27 |
1 |
4 |
|
Late Jurassic |
UJ |
161.2 |
145.5 |
15.7 |
31 |
31 |
2 |
2 |
33 |
0 |
29 |
2 |
2 |
|
Early Cretaceous |
LCr |
145.5 |
99.6 |
45.9 |
31 |
33 |
6 |
4 |
37 |
0 |
27 |
4 |
6 |
|
Late Cretaceous |
UCr |
99.6 |
65.5 |
34.1 |
33 |
58 |
32 |
7 |
65 |
1 |
27 |
6 |
31 |
|
Early Palaeogene |
LPa |
65.5 |
55.8 |
9.7 |
58 |
77 |
19 |
0 |
77 |
0 |
58 |
0 |
19 |
|
Middle Palaeogene |
MPa |
55.8 |
33.9 |
21.9 |
77 |
140 |
63 |
0 |
140 |
0 |
77 |
0 |
63 |
|
Late Palaeogene |
UPa |
33.9 |
23.0 |
10.9 |
140 |
158 |
18 |
0 |
158 |
0 |
140 |
0 |
18 |
|
Early Neogene |
LN |
23.0 |
5.3 |
17.7 |
158 |
183 |
25 |
0 |
183 |
0 |
158 |
0 |
25 |
|
Late Neogene |
UN |
5.3 |
0.0 |
5.3 |
183 |
183 |
3 |
0 |
186 |
0 |
/ |
0 |
3 |
Poster Winners 2024
The Princeton Field Guide to Mesozoic Sea Reptiles