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Table 5
Stratigraphic distribution of relevant vertebrate taxa in the San Angelo Formation. None of the taxa shown here extend beyond the Olenekian.
| Geological timescale | Taxa | ||||
|---|---|---|---|---|---|
| Series | Stages | Tupilakosauridae | Moradisaurini | Caseinae | Sphenacodontidae |
| Triassic | Olenekian | ? | |||
| Induan | X | ||||
| Lopingian | Changhsingian | X | X | ||
| Wuchiapingian | X | X | |||
| Guadalupian | Capitanian | X | X | ? | |
| Wordian | X | X | ? | ||
| Roadian | SA | SA | X | SA | |
| Cisuralian | Kungurian | X | X | ||
| Artinskian | X | ||||
| Sakmarian | X | ||||
| Asselian | X | ||||
Abbreviations: SA: present only in the San Angelo (and eventually in the Chickasha); ?: presence suggested by some studies but based upon fragmentary material of uncertain attribution or material from inadequately dated rocks.
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