RNames - Scheme: Ordovician time slices (Rassmussen et al., 2019) (11)
Binning results
| Structured Name | Oldest | Youngest |
|---|---|---|
| A Ross 1968 | Tr1 | Tr1 |
| Aalenian | Ka3 | Hi2 |
| Abak | Ka3 | Ka4 |
| Abarsaj | Ka3 | Hi2 |
| Aber Mawr Shales | Dw2 | Dw3 |
| Aber-Corris | Ka3 | Ka4 |
| Abercastle | Fl2 | Dp1 |
| Abercwmeiddaw | Ka3 | Ka4 |
| Abereiddi Tuff | Dw3 | Dw3 |
| Abereiddian | Dw2 | Dw3 |
| Acanthochitina barbata | Ka2 | Ka2 |
| Acanthochitina barbata | Ka1 | Ka2 |
| Acanthochitina cancellata | Ka1 | Ka2 |
| Acanthocordylodus festus | Ka1 | Ka1 |
| Acanthodina nobilis | Ka3 | Ka3 |
| Acanthodus lineatus | Tr1 | Tr1 |
| Acanthograptus sinensis | Tr1 | Tr2 |
| Acanthograptus suecicus | Dp1 | Dp1 |
| Acodus deltatus / Oneotodus costatus | Tr2 | Tr2 |
| Acodus deltatus / Paroistodus proteus | Tr1 | Fl1 |